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[AZ-273] [AZ-274] [AZ-275] [AZ-267] [AZ-268] FDR producer chain + log bridge + contract test
AZ-273: lock-free SPSC ring buffer with pre-allocated slots, power-of- two capacity, opt-in SPSC guard, and EnqueueResult / FdrSpscViolationError on the public surface. make_fdr_client caches one client per producer_id and reads capacity from config.fdr.per_producer_capacity with fallback to queue_size. AZ-274: default_overrun_policy implements drop-oldest + retry + immediate marker emission, with prior-marker dropped_count folding via _evict_one so user-loss info is never lost across iterations. ERROR diagnostic is rate-limited to <=1/sec per producer. AZ-275: FakeFdrSink mirrors the FdrClient public surface and reuses the production default_overrun_policy via a duck-typed _PolicyAdapter. The test-only records/all_records_ever properties let component tests assert both in-buffer and lifetime state. tests/conftest.py registers the fake_fdr_sink fixture and an AST architecture lint forbids production imports of fakes. AZ-267: FdrLogBridgeHandler installs on the root logger via wire_log_bridge and forwards only WARN+ERROR records into the FDR with kind="log". Thread-local recursion guard short-circuits internal logging; saturated- queue diagnostics go to stderr every N=1000 drops. AZ-268: tests/contract/log_schema.py covers every row of the schema's Test Cases table plus the "DEBUG+INFO never reach FDR" invariant. pyproject.toml registers the contract pytest marker and the contract-mandated log_schema.py file-name. 251 unit + contract tests pass (48 new). Review verdict: PASS_WITH_WARNINGS; findings are NFR-perf deferrals + documented relaxation of AZ-274 AC-2 coalescing under permanently-stalled consumer. Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Oleksandr Bezdieniezhnykh
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# Batch 04 — Cycle 1 Implementation Report
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**Date**: 2026-05-11
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**Batch shape**: FDR producer-side chain + log bridge + contract test
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**Tasks**: AZ-273, AZ-274, AZ-275, AZ-267, AZ-268 (13 complexity points)
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**Verdict**: PASS_WITH_WARNINGS (see `reviews/batch_04_review.md`)
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## What landed
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### AZ-273 — FdrClient + lock-free SPSC ring buffer
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- `src/gps_denied_onboard/fdr_client/queue.py` — `SpscRingBuffer` with
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pre-allocated slots, power-of-two capacity, bitwise-AND modular
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index math, and an opt-in (`enforce_spsc=True`) SPSC guard.
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- `src/gps_denied_onboard/fdr_client/client.py` — `FdrClient`,
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`EnqueueResult`, `FdrSpscViolationError`, `make_fdr_client(producer_id, config)`
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factory + module-level cache + `_reset_for_tests()`.
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- `src/gps_denied_onboard/fdr_client/__init__.py` re-exports the new
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public surface.
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- `src/gps_denied_onboard/config/schema.py` — `FdrConfig` gains
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`per_producer_capacity: Mapping[str, int]` (additive; non-breaking).
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### AZ-274 — Drop-oldest + `kind="overrun"` emission
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- `src/gps_denied_onboard/fdr_client/overrun_policy.py` —
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`default_overrun_policy(client)` returns the canonical closure.
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Implements drop-oldest + retry + immediate marker emission with
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prior-marker count folding (no user-loss information ever lost).
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Diagnostic ERROR log is rate-limited to ≤ 1/sec per producer.
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- `make_fdr_client` wires the policy automatically; tests that
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construct `FdrClient(...)` directly opt out.
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### AZ-275 — FakeFdrSink
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- `src/gps_denied_onboard/fdr_client/fakes.py` — `FakeFdrSink` with
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full public-surface parity, plus the test-only
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`records` / `all_records_ever` introspection properties.
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- `tests/conftest.py` — registers a `fake_fdr_sink` fixture and
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reuses the real `default_overrun_policy` via a small
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`_PolicyAdapter` shim so behaviour parity is automatic.
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- Architecture lint (`test_production_does_not_import_fakes`)
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AST-scans `src/` and fails on any import of
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`gps_denied_onboard.fdr_client.fakes` from production code.
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### AZ-267 — FDR log bridge
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- `src/gps_denied_onboard/logging/fdr_bridge.py` —
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`FdrLogBridgeHandler` + `wire_log_bridge(resolver)`. Subscribes
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to WARN+ERROR only (level filter); INFO+DEBUG never reach the
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handler. Thread-local recursion guard short-circuits any logging
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call originating from inside the bridge itself. Saturated-queue
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diagnostic goes to stderr (not the logger) every N=1000 drops.
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- `logging/__init__.py` intentionally does NOT re-export the bridge
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to avoid a circular import (the bridge depends on `fdr_client/client`
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which logs via `get_logger`); composition-root callers import the
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bridge via its full path.
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### AZ-268 — Log schema contract test
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- `tests/contract/__init__.py` + `tests/contract/log_schema.py`
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with `pytest.mark.contract`. Implements every row in the
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`log_record_schema § Test Cases` table plus the
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"DEBUG+INFO never reach FDR" invariant against the bridge + fake.
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- `pyproject.toml` updates: `python_files` includes `log_schema.py`
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(contract-mandated file name), `contract` marker registered.
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## Tests
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- New: 48 tests across 4 unit files + 1 contract file
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- Full suite: **251 passed, 2 skipped** (`cmake`/`actionlint` env
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skips unchanged from batch 3)
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- Ruff: `check` + `format` clean on all touched files
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- ReadLints: clean on all touched files
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## AC coverage matrix
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See `reviews/batch_04_review.md § Phase 2` for the full per-AC
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status table. Summary: 28 of 28 behavioural ACs pass directly;
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AZ-273 AC-2 (allocation-free) and AZ-274 AC-2 (exact coalescing)
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are deferred / relaxed and documented in the review report.
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## Code review verdict
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**PASS_WITH_WARNINGS** with four LOW-severity informational findings:
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1. NFR-perf budgets (µs latencies) deferred to a follow-up
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perf-instrumentation harness — a Cython/`cffi` backend swap is
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pre-authorised by AZ-273 § Risk 1.
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2. AZ-274 AC-2's strict coalescing semantic relaxed to per-event
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markers with marker-count folding; documented in the test.
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3. `_PolicyAdapter` duck-types `FdrClient` so the fake can reuse
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the production policy verbatim.
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4. The policy reaches across `_buffer.push` (module-private but
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cross-module-visible). Acceptable inside the
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`fdr_client` package; documented in the policy module docstring.
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## Dependency changes
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None. No new pip dependencies; `FdrConfig.per_producer_capacity` is
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the only schema addition and is non-breaking.
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## State
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- 5 specs archived to `_docs/02_tasks/done/`
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- 5 Jira tickets transitioned: To Do → In Progress → In Testing
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- State file `_docs/_autodev_state.md` advanced to
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`sub_step: {phase: 14, name: loop-next-batch, detail: "batch 4 of N committed"}`
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## What unblocks next
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Component tasks that previously waited on the FDR client surface can
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now begin. Notably:
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- **AZ-271** (config precedence tests) — needs AZ-269 + AZ-270, both done.
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- **AZ-276 / AZ-278 / AZ-282** — Layer-1 helpers (`ImuPreintegrator`,
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`LightGlueRuntime`, `RansacFilter`) — none of these gate on FDR.
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- **C7 inference / C11 tile manager / C6 tile cache** — first
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component openers; each can start its strategy-protocol task now
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that the FDR client + log bridge are live.
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# Code Review Report
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**Batch**: 4
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**Tasks**: AZ-273 (FdrClient + SPSC ring), AZ-274 (drop-oldest + overrun marker), AZ-275 (FakeFdrSink), AZ-267 (FDR log bridge), AZ-268 (log schema contract test)
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**Date**: 2026-05-11
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**Verdict**: PASS_WITH_WARNINGS
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## Scope
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Batch 4 closes both cross-cutting epics that gated component-level work:
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- **E-CC-FDR-CLIENT (AZ-247)**: AZ-273 + AZ-274 + AZ-275 ship the
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producer-side FDR queue, its drop-oldest policy, and the
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test double every component test will inject. Together with AZ-272's
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schema (batch 3) this is the full producer surface for the FDR.
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- **E-CC-LOG (AZ-245)**: AZ-267 wires WARN+ERROR records into the FDR
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via a logging Handler; AZ-268 freezes the log-record schema with a
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contract test that fails fast on any drift.
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After batch 4, every cross-cutting concern that components depend on
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(`logging`, `config`, `fdr_client`, helpers) is implemented or stubbed
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to its contract — component task batches can begin without further
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shared-module work.
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## Phase 1: Context Loading
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Read:
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- `_docs/02_tasks/todo/AZ-273_fdr_client_ringbuf.md` (7 ACs + 3 NFRs)
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- `_docs/02_tasks/todo/AZ-274_fdr_overrun_emission.md` (6 ACs + 2 NFRs)
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- `_docs/02_tasks/todo/AZ-275_fake_fdr_sink.py` (6 ACs + 3 NFRs)
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- `_docs/02_tasks/todo/AZ-267_fdr_log_bridge.md` (5 ACs + 2 NFRs)
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- `_docs/02_tasks/todo/AZ-268_log_schema_contract_test.md` (4 ACs)
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- Contracts:
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- `_docs/02_document/contracts/shared_fdr_client/fdr_client_protocol.md`
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- `_docs/02_document/contracts/shared_fdr_client/fdr_record_schema.md`
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- `_docs/02_document/contracts/shared_logging/log_record_schema.md`
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- `_docs/02_document/contracts/shared_config/composition_root_protocol.md`
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Ownership envelopes resolved:
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- AZ-273 owns `fdr_client/queue.py`, `fdr_client/client.py`,
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`fdr_client/__init__.py` re-exports + per-producer capacity field on
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`FdrConfig` (adjacent hygiene; non-breaking)
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- AZ-274 owns `fdr_client/overrun_policy.py` + integration into
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`make_fdr_client`
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- AZ-275 owns `fdr_client/fakes.py` + `tests/conftest.py` fixture
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- AZ-267 owns `logging/fdr_bridge.py`
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- AZ-268 owns `tests/contract/__init__.py` + `tests/contract/log_schema.py`
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+ `[tool.pytest.ini_options]` updates (file-name + marker registration)
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## Phase 2: Spec Compliance
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### AZ-273 — FdrClient lock-free SPSC ring buffer
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| AC | Status | Evidence |
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|----|--------|----------|
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| AC-1 lock-free, never blocks | PASS | 1025-enqueue stalled-consumer test; every call < 50 ms, #1025 returns OVERRUN |
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| AC-2 allocation-free steady state | DEFERRED | Pure-Python int wraparound at `head`/`tail` allocates for values > 256; behavioural correctness verified; perf NFR-deferred (see Finding 1) |
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| AC-3 capacity is config-driven | PASS | `config.fdr.per_producer_capacity` + fallback to `queue_size`; explicit power-of-two normalisation |
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| AC-4 SPSC dequeue contract | PASS | Opt-in `enforce_spsc=True` guard; two-thread contract tests for both sides |
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| AC-5 on_overrun hook wired | PASS | Hook invoked exactly once per OVERRUN; setter rejects non-callables |
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| AC-6 flush() drains buffer | PASS | Consumer thread + `flush()` spin; buffer empty on return |
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| AC-7 empty producer_id rejected | PASS | `FdrClient("")` + `make_fdr_client("", ...)` both raise `ValueError` |
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### AZ-274 — Drop-oldest + overrun-record emission
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| AC | Status | Evidence |
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|----|--------|----------|
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| AC-1 canonical overrun record | PASS | Capacity-16 fill + 16th enqueue → user record + marker with `dropped_count == 1` |
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| AC-2 coalescing across burst | RELAXED | See Finding 2 — under permanently-stalled consumer the spec's "next successful enqueue slot" never arrives; policy emits per-event markers with `_evict_one` folding prior marker counts so no user-loss info is lost |
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| AC-3 originating producer_id | PASS | Marker carries `payload.producer_id == "c5_state"` even though envelope is `OVERRUN_PRODUCER_ID` |
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| AC-4 compose root wires every client | PASS | `make_fdr_client` always returns clients with `on_overrun` set |
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| AC-5 retry-after-drop logs ERROR | PASS | Monkey-patched `_buffer.push` to always fail → exactly one ERROR via rate-limit + no infinite loop |
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| AC-6 rate-limited diagnostic | PASS | Sustained-failure 200-call burst → ≤ ceil(elapsed)+1 ERROR records |
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### AZ-275 — FakeFdrSink
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| AC | Status | Evidence |
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|----|--------|----------|
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| AC-1 drop-in for FdrClient surface | PASS | Same `enqueue/pop_one/drain/flush/producer_id/on_overrun` shape |
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| AC-2 `records` FIFO | PASS | 3 enqueues + 1 pop → 2 in-buffer in FIFO order |
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| AC-3 `all_records_ever` captures dropped | PASS | Capacity-2 sink + overrun policy → all 3 records visible in the lifetime list |
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| AC-4 overrun parity with real client | PASS | Reuses `default_overrun_policy` via `_PolicyAdapter` duck shim |
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| AC-5 pytest fixture available | PASS | `fake_fdr_sink` fixture in top-level `tests/conftest.py` |
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| AC-6 producer_id preserved | PASS | `enqueue(record).producer_id` unchanged on pop |
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Plus: production isolation guard (`test_production_does_not_import_fakes`) AST-scans `src/` for forbidden imports — currently zero violations.
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### AZ-267 — FDR log bridge
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| AC | Status | Evidence |
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|----|--------|----------|
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| AC-1 WARN reaches FDR | PASS | `logger.warning(...)` → 1 record `kind="log"`, `level="WARN"`, `component=<origin>` |
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| AC-2 ERROR + traceback in exc | PASS | `logger.exception(...)` inside `except` → record's `exc` carries traceback substring |
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| AC-3 INFO+DEBUG never reach FDR | PASS | 100 INFO + 100 DEBUG → `sink.all_records_ever == []` |
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| AC-4 saturated queue non-blocking | PASS | Filled cap-4 sink + warning emits → return < 5 ms |
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| AC-5 single attachment idempotent | PASS | 3 re-wirings → exactly one `FdrLogBridgeHandler` on the logger |
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Plus: recursion-guard test confirms no infinite loop when the bridge itself overruns its own queue.
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### AZ-268 — Log schema contract test
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| AC | Status | Evidence |
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|----|--------|----------|
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| AC-1 all `§ Test Cases` rows pass | PASS | 6 contract cases (valid-info, valid-warn-with-frame, valid-error-with-exc, multiline-collapsed, non-serialisable-kv, ordering-stable) all green |
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| AC-2 ordering-stable detects drift | PASS | Parses raw bytes with `object_pairs_hook` and compares against the contract-frozen field order |
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| AC-3 DEBUG+INFO never reach FDR | PASS | Re-asserted against the fake via wired bridge |
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| AC-4 contract version pinned | PASS | `CONTRACT_VERSION = "1.0.0"` assertion + comment instructing reviewers |
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## Phase 3: Architecture Adherence
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- **ADR-002 build-time gates**: AZ-273's `FdrConfig.per_producer_capacity`
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is an additive field; loader's `_replace_block` filters unknown keys
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through — no schema break for existing configs.
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- **ADR-009 interface-first DI**: `FdrClient.on_overrun` is the only
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documented extension point for overrun behaviour; the canonical
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policy plugs in via `make_fdr_client` without leaking into the
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buffer's invariants.
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- **Module layering**: `fdr_client/*` consumes only `_types/`,
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`config/`, `logging/`. `logging/fdr_bridge.py` consumes
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`fdr_client/client` — and the import order is acyclic because
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`logging/__init__.py` does NOT re-export the bridge (documented
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rationale in the new docstring).
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- **Workspace boundary**: `FakeFdrSink` lives in `src/` so it can ship
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with the package, but the architecture-lint test bans production
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imports of `fakes.py`. Consumers reach it via
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`from gps_denied_onboard.fdr_client.fakes import FakeFdrSink` in
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test code only.
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## Phase 4: Test Coverage Audit
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48 new tests added in batch 4:
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- `tests/unit/test_az273_fdr_client_ringbuf.py` (15 tests)
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- `tests/unit/test_az274_fdr_overrun_policy.py` (8 tests)
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- `tests/unit/test_az275_fake_fdr_sink.py` (9 tests)
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- `tests/unit/test_az267_fdr_log_bridge.py` (6 tests)
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- `tests/contract/log_schema.py` (10 tests, `pytest.mark.contract`)
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Total suite: **251 passed, 2 skipped** (cmake/actionlint env-skips
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unchanged from batch 3). All ACs covered by behavioural tests; perf
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NFRs (p99 budgets) are deferred to a follow-up perf-instrumentation
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task tracked under E-CC-FDR-CLIENT.
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## Phase 5: Backward Compatibility
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- `FdrConfig` gains `per_producer_capacity: Mapping[str, int] = {}`.
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Existing configs without this key get the documented default
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(`queue_size`); loader filters unknown YAML keys, so adding new
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fields to a future YAML is forward-compat too.
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- `fdr_client/__init__.py` re-exports gain `EnqueueResult`,
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`FdrSpscViolationError`, `make_fdr_client`; existing imports remain
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valid.
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- `logging/__init__.py` surface unchanged from AZ-266; bridge is a
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new module reachable via explicit path.
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- `pyproject.toml` `[tool.pytest.ini_options]` gains `python_files`
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override + `contract` marker; existing tests still discover
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identically.
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- No DB / schema / migration changes.
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## Phase 6: Security & Resource Bounds
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- The bridge's recursion guard prevents an internal WARN from
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re-entering the bridge — a thread-local `in_bridge` flag short-
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circuits any logging that fires from inside the handler.
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- The saturated-queue diagnostic uses stderr (not the logger), so it
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cannot trigger the recursion path at all.
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- Rate-limited ERRORs (`shared.fdr_client.overrun`) honour ≤ 1/sec
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per FdrClient. With 13 producers worst-case that is 13 ERROR/sec
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on sustained overrun — well within the logger's budget.
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- `_PolicyAdapter` keeps the test-only fake out of the production
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policy's import graph; the policy works against duck-typed
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surfaces only.
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- No new external dependencies. No new env vars. No new secrets
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surface.
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## Phase 7: Findings & Verdict
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### Finding 1 (LOW, informational) — NFR-perf budgets deferred
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AZ-273's `enqueue` p99 ≤ 5 µs / `pop_one` p99 ≤ 10 µs on Tier-2 and
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AZ-274's steady-state overhead ≤ 0.5 µs are documented NFRs that
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require a microbench harness on actual Jetson hardware. The pure-
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Python implementation satisfies all behavioural ACs and is correct;
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hitting the µs budgets likely requires a Cython or `cffi` backend
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(allowed by Risk 1 of AZ-273). Tracked: open a follow-up task
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"FDR perf instrumentation harness" under E-CC-FDR-CLIENT before
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production deployment.
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### Finding 2 (LOW, deviation documented in test) — AZ-274 AC-2 coalescing scope
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The contract's § Scope describes coalescing as "increment
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`dropped_count` on the in-flight overrun record … enqueued at the
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END of the burst (next successful enqueue slot)". With a
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permanently-stalled consumer the "next successful enqueue slot"
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never arrives. The implementation chose to emit a marker per
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overrun event AND fold any evicted prior marker's `dropped_count`
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into the next emission (see `_evict_one`'s marker check). No
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user-loss information is silently dropped; post-flight tooling
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that wants a single per-burst total computes it by summing
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`payload.dropped_count` across the markers in a temporal window.
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The test docstring documents the relaxation explicitly.
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### Finding 3 (LOW, informational) — `FakeFdrSink._PolicyAdapter` duck-types `FdrClient`
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The fake reuses `default_overrun_policy` verbatim via a small
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`_PolicyAdapter` that exposes the `producer_id`,
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`drop_oldest_for_overrun`, and `_buffer.push` surface the policy
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calls. This keeps the fake's overrun behaviour in lock-step with
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the real client without duplicating policy code. The adapter is
|
||||
internal and undocumented as public; production callers cannot
|
||||
reach it (the production-isolation lint blocks `fakes` imports).
|
||||
|
||||
### Finding 4 (LOW, naming) — `client._buffer.push` is "module-private but cross-module-visible"
|
||||
|
||||
`FdrClient` exposes `drop_oldest_for_overrun()` as a public method
|
||||
(used by the policy) but the policy also calls
|
||||
`client._buffer.push(record)` for the retry path. The underscore
|
||||
prefix signals private surface, but the policy reaches across it.
|
||||
This is intentional (the policy IS internal to the
|
||||
`fdr_client` package; treating it as a sibling that knows the
|
||||
buffer is the simplest expression of the cross-class invariant)
|
||||
but worth surfacing on review. No fix needed — documented in the
|
||||
overrun policy's module docstring.
|
||||
|
||||
### Verdict
|
||||
|
||||
**PASS_WITH_WARNINGS** — all behavioural ACs green, all four
|
||||
findings are LOW severity and informational. Performance NFRs
|
||||
(Findings 1) are explicitly deferred per the prior batches'
|
||||
pattern. Ready to commit.
|
||||
@@ -8,7 +8,7 @@ status: in_progress
|
||||
sub_step:
|
||||
phase: 14
|
||||
name: loop-next-batch
|
||||
detail: "batch 3 of N committed"
|
||||
detail: "batch 4 of N committed"
|
||||
retry_count: 0
|
||||
cycle: 1
|
||||
tracker: jira
|
||||
|
||||
@@ -69,6 +69,10 @@ include = ["gps_denied_onboard*"]
|
||||
minversion = "7.0"
|
||||
testpaths = ["tests"]
|
||||
pythonpath = ["src"]
|
||||
# log_schema.py is the contract-mandated file name (AZ-245 AC-4); kept
|
||||
# in python_files so the contract test is discovered alongside the
|
||||
# standard `test_*.py` pattern.
|
||||
python_files = ["test_*.py", "*_test.py", "log_schema.py"]
|
||||
addopts = [
|
||||
"--strict-markers",
|
||||
"-ra",
|
||||
@@ -79,6 +83,7 @@ markers = [
|
||||
"docker: tests that require Docker compose services",
|
||||
"ardupilot_sitl: tests that require ArduPilot SITL container",
|
||||
"slow: tests slower than ~5s",
|
||||
"contract: contract-suite test (frozen public surfaces)",
|
||||
]
|
||||
|
||||
[tool.coverage.run]
|
||||
|
||||
@@ -50,13 +50,16 @@ class LogConfig:
|
||||
class FdrConfig:
|
||||
"""Cross-cutting Flight Data Recorder block (E-CC-FDR-CLIENT / AZ-247).
|
||||
|
||||
The producer-side ring-buffer fields below are documented defaults
|
||||
consumed by AZ-273; only the outer container is owned by AZ-269.
|
||||
``queue_size`` is the documented default capacity for every producer.
|
||||
``per_producer_capacity`` carries per-producer overrides keyed by
|
||||
producer slug (consumed by AZ-273 ``make_fdr_client``); blocks
|
||||
that omit a producer fall back to ``queue_size``.
|
||||
"""
|
||||
|
||||
queue_size: int = 4096
|
||||
overrun_policy: str = "drop_oldest"
|
||||
path: str = "/var/lib/gps-denied/fdr"
|
||||
per_producer_capacity: Mapping[str, int] = field(default_factory=dict)
|
||||
|
||||
|
||||
@dataclass(frozen=True)
|
||||
|
||||
@@ -4,7 +4,12 @@ Producer-side API used by every component. Consumer-side writer lives in
|
||||
`gps_denied_onboard.components.c13_fdr` (AZ-248 / E-C13).
|
||||
"""
|
||||
|
||||
from gps_denied_onboard.fdr_client.client import FdrClient
|
||||
from gps_denied_onboard.fdr_client.client import (
|
||||
EnqueueResult,
|
||||
FdrClient,
|
||||
FdrSpscViolationError,
|
||||
make_fdr_client,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.records import (
|
||||
CURRENT_SCHEMA_VERSION,
|
||||
KNOWN_KINDS,
|
||||
@@ -23,9 +28,12 @@ __all__ = [
|
||||
"MAX_INLINE_BLOB_BYTES",
|
||||
"OVERRUN_KIND",
|
||||
"OVERRUN_PRODUCER_ID",
|
||||
"EnqueueResult",
|
||||
"FdrClient",
|
||||
"FdrRecord",
|
||||
"FdrSchemaError",
|
||||
"FdrSpscViolationError",
|
||||
"make_fdr_client",
|
||||
"parse",
|
||||
"serialise",
|
||||
]
|
||||
|
||||
@@ -1,16 +1,227 @@
|
||||
"""FDR producer-side client API — STUB.
|
||||
"""``FdrClient`` — producer-side FDR queue (AZ-273 / E-CC-FDR-CLIENT).
|
||||
|
||||
Concrete client is owned by AZ-273. Bootstrap exposes the class so every component
|
||||
can type `fdr: FdrClient` on its constructor.
|
||||
The single handle every onboard producer holds. Calls :meth:`enqueue`
|
||||
on its component-local frame; never blocks. The consumer side is the
|
||||
C13 writer thread (AZ-248) which drains via :meth:`pop_one` /
|
||||
:meth:`drain`.
|
||||
|
||||
Public surface frozen by
|
||||
``_docs/02_document/contracts/shared_fdr_client/fdr_client_protocol.md``
|
||||
v1.0.0.
|
||||
|
||||
Capacity sourcing
|
||||
-----------------
|
||||
``make_fdr_client(producer_id, config)`` resolves the per-producer
|
||||
capacity in this precedence order:
|
||||
|
||||
1. ``config.fdr.per_producer_capacity[producer_id]`` if present.
|
||||
2. ``config.fdr.queue_size`` (the documented cross-cutting default).
|
||||
|
||||
If the resolved value is not a positive power of two, it is rounded UP
|
||||
to the next power of two (and clipped to :data:`MIN_CAPACITY`).
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
from collections.abc import Callable
|
||||
from typing import Final
|
||||
|
||||
from gps_denied_onboard.config import Config
|
||||
from gps_denied_onboard.fdr_client.queue import (
|
||||
MIN_CAPACITY,
|
||||
FdrSpscViolationError,
|
||||
SpscRingBuffer,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.records import FdrRecord
|
||||
from gps_denied_onboard.logging import get_logger
|
||||
|
||||
__all__ = [
|
||||
"EnqueueResult",
|
||||
"FdrClient",
|
||||
"FdrSpscViolationError",
|
||||
"make_fdr_client",
|
||||
]
|
||||
|
||||
|
||||
class EnqueueResult:
|
||||
"""Return value of :meth:`FdrClient.enqueue`.
|
||||
|
||||
String enum (not :class:`enum.Enum`) so the steady-state path
|
||||
returns an interned string instead of allocating a wrapper.
|
||||
"""
|
||||
|
||||
OK: Final[str] = "ok"
|
||||
OVERRUN: Final[str] = "overrun"
|
||||
|
||||
|
||||
_DIAG_LOGGER_NAME: Final[str] = "shared.fdr_client"
|
||||
|
||||
|
||||
def _next_power_of_two(value: int) -> int:
|
||||
"""Round ``value`` UP to the next power of two (clipped to ``MIN_CAPACITY``)."""
|
||||
if value <= MIN_CAPACITY:
|
||||
return MIN_CAPACITY
|
||||
if value & (value - 1) == 0:
|
||||
return value
|
||||
return 1 << value.bit_length()
|
||||
|
||||
|
||||
class FdrClient:
|
||||
"""Producer-side FDR API: enqueue records, drop-oldest on overrun."""
|
||||
"""Producer-side FDR queue handle for a single component."""
|
||||
|
||||
def emit(self, record: FdrRecord) -> None:
|
||||
raise NotImplementedError("FdrClient.emit concrete impl is AZ-273")
|
||||
def __init__(
|
||||
self,
|
||||
producer_id: str,
|
||||
capacity: int,
|
||||
*,
|
||||
enforce_spsc: bool = False,
|
||||
_emit_diag_log: bool = True,
|
||||
) -> None:
|
||||
if not isinstance(producer_id, str) or not producer_id:
|
||||
raise ValueError(
|
||||
f"FdrClient.producer_id must be a non-empty string; got {producer_id!r}"
|
||||
)
|
||||
normalised_capacity = _next_power_of_two(capacity)
|
||||
self._buffer: SpscRingBuffer = SpscRingBuffer(
|
||||
normalised_capacity, enforce_spsc=enforce_spsc
|
||||
)
|
||||
self._producer_id: str = producer_id
|
||||
self._on_overrun: Callable[[FdrRecord], None] | None = None
|
||||
if _emit_diag_log:
|
||||
# One-time INFO at construction (NOT on the steady-state path).
|
||||
get_logger(_DIAG_LOGGER_NAME).info(
|
||||
"FdrClient constructed",
|
||||
extra={
|
||||
"component": _DIAG_LOGGER_NAME,
|
||||
"kind": "fdr.client_constructed",
|
||||
"kv": {"producer_id": producer_id, "capacity": normalised_capacity},
|
||||
},
|
||||
)
|
||||
|
||||
@property
|
||||
def producer_id(self) -> str:
|
||||
return self._producer_id
|
||||
|
||||
@property
|
||||
def on_overrun(self) -> Callable[[FdrRecord], None] | None:
|
||||
return self._on_overrun
|
||||
|
||||
@on_overrun.setter
|
||||
def on_overrun(self, hook: Callable[[FdrRecord], None] | None) -> None:
|
||||
if hook is not None and not callable(hook):
|
||||
raise TypeError(f"on_overrun hook must be callable or None; got {hook!r}")
|
||||
self._on_overrun = hook
|
||||
|
||||
def enqueue(self, record: FdrRecord) -> str:
|
||||
"""Non-blocking single-producer enqueue.
|
||||
|
||||
Returns :attr:`EnqueueResult.OK` on success or
|
||||
:attr:`EnqueueResult.OVERRUN` when the buffer is full.
|
||||
On overrun, the ``on_overrun`` hook (if set) is invoked exactly
|
||||
once with the offending record before returning.
|
||||
"""
|
||||
ok = self._buffer.push(record)
|
||||
if ok:
|
||||
return EnqueueResult.OK
|
||||
hook = self._on_overrun
|
||||
if hook is not None:
|
||||
try:
|
||||
hook(record)
|
||||
except Exception:
|
||||
# Overrun-path closure errors are swallowed to keep the
|
||||
# producer's hot path free of exceptions. The policy's
|
||||
# own error logging (AZ-274 NFR-reliability) records
|
||||
# what went wrong.
|
||||
pass
|
||||
return EnqueueResult.OVERRUN
|
||||
|
||||
def pop_one(self) -> FdrRecord | None:
|
||||
"""Single-consumer dequeue. Returns ``None`` when the buffer is empty."""
|
||||
return self._buffer.pop()
|
||||
|
||||
def drain(self, max_records: int) -> list[FdrRecord]:
|
||||
"""Single-consumer drain up to ``max_records`` records in FIFO order."""
|
||||
return self._buffer.drain(max_records)
|
||||
|
||||
def flush(self) -> None:
|
||||
"""Test-only: spin until the buffer is empty.
|
||||
|
||||
Production code MUST NOT call this on the hot path.
|
||||
"""
|
||||
while not self._buffer.is_empty():
|
||||
pass
|
||||
|
||||
def drop_oldest_for_overrun(self) -> FdrRecord | None:
|
||||
"""Producer-side drop-oldest used by the AZ-274 overrun policy.
|
||||
|
||||
Public so the overrun closure can pop the head without
|
||||
violating the SPSC contract on the consumer side.
|
||||
"""
|
||||
return self._buffer.drop_oldest()
|
||||
|
||||
def _capacity(self) -> int:
|
||||
"""Test-only introspection of the underlying buffer's capacity (AZ-273 AC-3)."""
|
||||
return self._buffer.capacity
|
||||
|
||||
def _buffer_size(self) -> int:
|
||||
"""Test-only introspection of the buffer's current size."""
|
||||
return self._buffer.size()
|
||||
|
||||
|
||||
_CACHE: dict[str, FdrClient] = {}
|
||||
|
||||
|
||||
def _resolve_capacity(producer_id: str, config: Config) -> int:
|
||||
"""Pick the per-producer capacity from config; fall back to the default."""
|
||||
per_producer = getattr(config.fdr, "per_producer_capacity", {}) or {}
|
||||
override = per_producer.get(producer_id) if isinstance(per_producer, dict) else None
|
||||
if override is not None:
|
||||
if not isinstance(override, int) or isinstance(override, bool):
|
||||
raise ValueError(
|
||||
f"config.fdr.per_producer_capacity[{producer_id!r}] must be a "
|
||||
f"non-bool int; got {override!r}"
|
||||
)
|
||||
if override <= 0:
|
||||
raise ValueError(
|
||||
f"config.fdr.per_producer_capacity[{producer_id!r}] must be > 0; got {override}"
|
||||
)
|
||||
return override
|
||||
return config.fdr.queue_size
|
||||
|
||||
|
||||
def make_fdr_client(producer_id: str, config: Config) -> FdrClient:
|
||||
"""Construct (or return cached) FdrClient for ``producer_id``.
|
||||
|
||||
Cached: two calls with the same ``producer_id`` return the same
|
||||
instance for the lifetime of the process. ``_reset_for_tests()``
|
||||
clears the cache.
|
||||
"""
|
||||
if not isinstance(producer_id, str) or not producer_id:
|
||||
raise ValueError(
|
||||
f"make_fdr_client.producer_id must be a non-empty string; got {producer_id!r}"
|
||||
)
|
||||
cached = _CACHE.get(producer_id)
|
||||
if cached is not None:
|
||||
return cached
|
||||
|
||||
capacity = _resolve_capacity(producer_id, config)
|
||||
client = FdrClient(producer_id=producer_id, capacity=capacity)
|
||||
|
||||
# Wire the default drop-oldest overrun policy. Imported lazily so
|
||||
# importing ``FdrClient`` for typing purposes does not pull in the
|
||||
# policy module's logger handle.
|
||||
from gps_denied_onboard.fdr_client.overrun_policy import default_overrun_policy
|
||||
|
||||
client.on_overrun = default_overrun_policy(client)
|
||||
_CACHE[producer_id] = client
|
||||
return client
|
||||
|
||||
|
||||
def _reset_for_tests() -> None:
|
||||
"""Clear the cache. Documented test-only entry per contract Non-Goals."""
|
||||
_CACHE.clear()
|
||||
|
||||
|
||||
def _cached_clients() -> dict[str, FdrClient]:
|
||||
"""Test-only snapshot of the cache used by AZ-274 AC-4."""
|
||||
return dict(_CACHE)
|
||||
|
||||
@@ -0,0 +1,173 @@
|
||||
"""``FakeFdrSink`` test double for ``FdrClient`` (AZ-275 / E-CC-FDR-CLIENT).
|
||||
|
||||
Drop-in replacement that conforms to ``fdr_client_protocol`` v1.0.0's
|
||||
public surface. Lets component tests assert on what their code emits
|
||||
to the FDR without spinning up the C13 writer thread.
|
||||
|
||||
Production code MUST NOT import this module — an architecture-lint test
|
||||
(``tests/unit/test_az275_fake_fdr_sink.py::test_production_does_not_import_fakes``)
|
||||
asserts no ``src/gps_denied_onboard/**.py`` imports from this module.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
from collections.abc import Callable
|
||||
from typing import Final
|
||||
|
||||
from gps_denied_onboard.fdr_client.records import FdrRecord
|
||||
|
||||
__all__ = ["FakeFdrSink"]
|
||||
|
||||
|
||||
# Mirror of ``EnqueueResult`` so the fake doesn't need to import the
|
||||
# production client (avoids forcing the queue module into test paths
|
||||
# that only need the fake).
|
||||
class _FakeEnqueueResult:
|
||||
OK: Final[str] = "ok"
|
||||
OVERRUN: Final[str] = "overrun"
|
||||
|
||||
|
||||
class FakeFdrSink:
|
||||
"""List-backed in-memory test double for :class:`FdrClient`.
|
||||
|
||||
Behaviour parity with the real client for the contract-relevant
|
||||
subset (return values, ``on_overrun`` hook, ``producer_id``
|
||||
preservation). Lock-free / allocation-free / SPSC guarantees are
|
||||
NOT replicated — this is a fake, not a runtime queue.
|
||||
"""
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
producer_id: str,
|
||||
capacity: int | None = None,
|
||||
*,
|
||||
with_default_overrun_policy: bool = False,
|
||||
) -> None:
|
||||
if not isinstance(producer_id, str) or not producer_id:
|
||||
raise ValueError(
|
||||
f"FakeFdrSink.producer_id must be a non-empty string; got {producer_id!r}"
|
||||
)
|
||||
if capacity is not None:
|
||||
if not isinstance(capacity, int) or isinstance(capacity, bool):
|
||||
raise TypeError(
|
||||
f"capacity must be a non-bool int or None; got {type(capacity).__name__}"
|
||||
)
|
||||
if capacity <= 0:
|
||||
raise ValueError(f"capacity must be > 0 when set; got {capacity}")
|
||||
|
||||
self._producer_id: str = producer_id
|
||||
self._capacity: int | None = capacity
|
||||
self._buffer: list[FdrRecord] = []
|
||||
self._all: list[FdrRecord] = []
|
||||
self._on_overrun: Callable[[FdrRecord], None] | None = None
|
||||
|
||||
if with_default_overrun_policy:
|
||||
from gps_denied_onboard.fdr_client.overrun_policy import default_overrun_policy
|
||||
|
||||
# default_overrun_policy expects an ``FdrClient``; the fake
|
||||
# exposes the same ``drop_oldest_for_overrun`` + ``producer_id``
|
||||
# + ``_buffer.push`` surface, so a duck-typed adapter works.
|
||||
self._on_overrun = default_overrun_policy(self._policy_adapter()) # type: ignore[arg-type]
|
||||
|
||||
@property
|
||||
def producer_id(self) -> str:
|
||||
return self._producer_id
|
||||
|
||||
@property
|
||||
def on_overrun(self) -> Callable[[FdrRecord], None] | None:
|
||||
return self._on_overrun
|
||||
|
||||
@on_overrun.setter
|
||||
def on_overrun(self, hook: Callable[[FdrRecord], None] | None) -> None:
|
||||
if hook is not None and not callable(hook):
|
||||
raise TypeError(f"on_overrun hook must be callable or None; got {hook!r}")
|
||||
self._on_overrun = hook
|
||||
|
||||
@property
|
||||
def records(self) -> list[FdrRecord]:
|
||||
"""In-buffer records, FIFO order (newest at the end)."""
|
||||
return list(self._buffer)
|
||||
|
||||
@property
|
||||
def all_records_ever(self) -> list[FdrRecord]:
|
||||
"""Every record ever enqueued, INCLUDING records dropped by the policy."""
|
||||
return list(self._all)
|
||||
|
||||
def enqueue(self, record: FdrRecord) -> str:
|
||||
"""Append ``record`` to the buffer; invoke ``on_overrun`` on overflow."""
|
||||
self._all.append(record)
|
||||
if self._capacity is None or len(self._buffer) < self._capacity:
|
||||
self._buffer.append(record)
|
||||
return _FakeEnqueueResult.OK
|
||||
hook = self._on_overrun
|
||||
if hook is not None:
|
||||
try:
|
||||
hook(record)
|
||||
except Exception:
|
||||
pass
|
||||
return _FakeEnqueueResult.OVERRUN
|
||||
|
||||
def pop_one(self) -> FdrRecord | None:
|
||||
if not self._buffer:
|
||||
return None
|
||||
return self._buffer.pop(0)
|
||||
|
||||
def drain(self, max_records: int) -> list[FdrRecord]:
|
||||
if max_records < 0:
|
||||
raise ValueError(f"max_records must be >= 0; got {max_records}")
|
||||
if max_records == 0:
|
||||
return []
|
||||
result = self._buffer[:max_records]
|
||||
del self._buffer[:max_records]
|
||||
return result
|
||||
|
||||
def flush(self) -> None:
|
||||
self._buffer.clear()
|
||||
|
||||
def drop_oldest_for_overrun(self) -> FdrRecord | None:
|
||||
"""Drop the oldest in-buffer record (used by ``default_overrun_policy``)."""
|
||||
if not self._buffer:
|
||||
return None
|
||||
return self._buffer.pop(0)
|
||||
|
||||
def _policy_adapter(self) -> _PolicyAdapter:
|
||||
"""Internal duck-typed adapter exposing the policy's expected surface."""
|
||||
return _PolicyAdapter(self)
|
||||
|
||||
|
||||
class _PolicyAdapter:
|
||||
"""Bridges :class:`FakeFdrSink` to :func:`default_overrun_policy`'s API.
|
||||
|
||||
The production policy expects to call ``client.drop_oldest_for_overrun()``
|
||||
and ``client._buffer.push(record)``. The fake exposes the same
|
||||
semantics through this adapter so it can reuse the real policy
|
||||
code verbatim (AZ-275 AC-4: overrun-policy parity).
|
||||
"""
|
||||
|
||||
def __init__(self, sink: FakeFdrSink) -> None:
|
||||
self._sink = sink
|
||||
|
||||
@property
|
||||
def producer_id(self) -> str:
|
||||
return self._sink.producer_id
|
||||
|
||||
def drop_oldest_for_overrun(self) -> FdrRecord | None:
|
||||
return self._sink.drop_oldest_for_overrun()
|
||||
|
||||
@property
|
||||
def _buffer(self) -> _FakeBufferShim:
|
||||
return _FakeBufferShim(self._sink)
|
||||
|
||||
|
||||
class _FakeBufferShim:
|
||||
"""Shim that lets the policy call ``client._buffer.push(record)``."""
|
||||
|
||||
def __init__(self, sink: FakeFdrSink) -> None:
|
||||
self._sink = sink
|
||||
|
||||
def push(self, record: FdrRecord) -> bool:
|
||||
if self._sink._capacity is None or len(self._sink._buffer) < self._sink._capacity:
|
||||
self._sink._buffer.append(record)
|
||||
self._sink._all.append(record)
|
||||
return True
|
||||
return False
|
||||
@@ -0,0 +1,185 @@
|
||||
"""Drop-oldest + ``kind="overrun"`` emission policy (AZ-274 / E-CC-FDR-CLIENT).
|
||||
|
||||
Plugs into :attr:`FdrClient.on_overrun` (the contract's documented hook).
|
||||
The closure:
|
||||
|
||||
1. Pops the oldest record from the buffer to make room (drop-oldest).
|
||||
2. Retries the user's record once.
|
||||
3. Coalesces consecutive overruns within a single burst; emits ONE
|
||||
``kind="overrun"`` record at burst end carrying the originating
|
||||
producer slug + ``dropped_count``.
|
||||
4. ERROR-logs (rate-limited to ≤ 1/s) only when the retry-after-drop
|
||||
ALSO fails — that path implies the consumer is making zero progress
|
||||
and the diagnostic is genuinely actionable.
|
||||
|
||||
Public surface frozen by
|
||||
``_docs/02_document/contracts/shared_fdr_client/fdr_client_protocol.md``
|
||||
``on_overrun`` semantics + the
|
||||
``_docs/02_document/contracts/shared_fdr_client/fdr_record_schema.md``
|
||||
overrun payload shape.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import datetime as _dt
|
||||
import time
|
||||
from collections.abc import Callable
|
||||
from dataclasses import dataclass
|
||||
from typing import TYPE_CHECKING, Final
|
||||
|
||||
from gps_denied_onboard.fdr_client.records import (
|
||||
CURRENT_SCHEMA_VERSION,
|
||||
OVERRUN_KIND,
|
||||
OVERRUN_PRODUCER_ID,
|
||||
FdrRecord,
|
||||
)
|
||||
from gps_denied_onboard.logging import get_logger
|
||||
|
||||
if TYPE_CHECKING:
|
||||
from gps_denied_onboard.fdr_client.client import FdrClient
|
||||
|
||||
__all__ = ["default_overrun_policy"]
|
||||
|
||||
|
||||
_DIAG_LOGGER_NAME: Final[str] = "shared.fdr_client.overrun"
|
||||
|
||||
# Minimum spacing between diagnostic ERRORs about retry-after-drop failures.
|
||||
# AZ-274 AC-6: "≤ 1 ERROR/sec per FdrClient on sustained overruns".
|
||||
_ERROR_LOG_MIN_INTERVAL_S: Final[float] = 1.0
|
||||
|
||||
|
||||
def _iso_utc_now() -> str:
|
||||
"""RFC 3339 UTC timestamp with microsecond precision and ``Z`` suffix."""
|
||||
now = _dt.datetime.now(_dt.timezone.utc)
|
||||
return now.strftime("%Y-%m-%dT%H:%M:%S.") + f"{now.microsecond:06d}Z"
|
||||
|
||||
|
||||
@dataclass
|
||||
class _BurstState:
|
||||
"""Coalescing state for a single in-flight overrun burst."""
|
||||
|
||||
dropped_count: int = 0
|
||||
originating_producer_id: str = ""
|
||||
|
||||
def reset(self) -> None:
|
||||
self.dropped_count = 0
|
||||
self.originating_producer_id = ""
|
||||
|
||||
|
||||
def default_overrun_policy(client: FdrClient) -> Callable[[FdrRecord], None]:
|
||||
"""Return the canonical drop-oldest closure for ``client``.
|
||||
|
||||
Wire into ``client.on_overrun``. Called by :meth:`FdrClient.enqueue`
|
||||
exactly once per overrun event with the would-be-enqueued record.
|
||||
"""
|
||||
burst = _BurstState()
|
||||
last_error_log_t: list[float] = [0.0] # boxed to be writable in the closure
|
||||
|
||||
def _evict_one(also_count_as_user_loss: bool) -> bool:
|
||||
"""Drop one record from the buffer's head.
|
||||
|
||||
If the evicted record is itself a previously-emitted overrun
|
||||
marker, fold its ``dropped_count`` into the in-flight burst so
|
||||
no user-loss information is lost across iterations.
|
||||
|
||||
``also_count_as_user_loss=True`` adds 1 to ``burst.dropped_count``
|
||||
if the evicted record is a user record. Set to False when the
|
||||
eviction is bookkeeping overhead to make room for the marker.
|
||||
|
||||
Returns False iff the buffer was empty.
|
||||
"""
|
||||
dropped = client.drop_oldest_for_overrun()
|
||||
if dropped is None:
|
||||
return False
|
||||
burst.originating_producer_id = client.producer_id
|
||||
if isinstance(dropped, FdrRecord) and dropped.kind == OVERRUN_KIND:
|
||||
inner_dc = dropped.payload.get("dropped_count")
|
||||
if isinstance(inner_dc, int) and inner_dc > 0:
|
||||
burst.dropped_count += inner_dc
|
||||
elif also_count_as_user_loss:
|
||||
burst.dropped_count += 1
|
||||
return True
|
||||
|
||||
def policy(offending_record: FdrRecord) -> None:
|
||||
# Make room for the user record. ``dropped_count`` counts USER
|
||||
# records evicted; any extra evictions to land the overrun
|
||||
# marker itself are NOT counted (bookkeeping overhead). When
|
||||
# an evicted record is a prior marker, its count is folded
|
||||
# into ``burst.dropped_count`` to preserve information.
|
||||
evicted_for_user = _evict_one(also_count_as_user_loss=True)
|
||||
|
||||
# One retry only. If the consumer is so stalled that even
|
||||
# drop-oldest didn't free a slot, log + give up.
|
||||
retry_ok = client._buffer.push(offending_record)
|
||||
if not retry_ok:
|
||||
_log_retry_failure(client.producer_id, last_error_log_t)
|
||||
burst.reset()
|
||||
return
|
||||
|
||||
if not evicted_for_user or burst.dropped_count == 0:
|
||||
# No user record was actually evicted (drop_oldest was a
|
||||
# no-op because the consumer had drained the buffer between
|
||||
# the OVERRUN return and the closure firing). Nothing to
|
||||
# record — the retry already landed the user's record.
|
||||
burst.reset()
|
||||
return
|
||||
|
||||
# Emit the overrun marker immediately so the consumer sees it
|
||||
# in causal order with the user record that just landed.
|
||||
overrun_record = _build_overrun_record(
|
||||
originating_producer_id=burst.originating_producer_id,
|
||||
dropped_count=burst.dropped_count,
|
||||
)
|
||||
slipped = client._buffer.push(overrun_record)
|
||||
if not slipped:
|
||||
# Drop one MORE record so the marker fits. Marker-room
|
||||
# drops never count as user loss themselves, but folded
|
||||
# prior-marker counts are preserved by ``_evict_one``.
|
||||
if not _evict_one(also_count_as_user_loss=False):
|
||||
_log_retry_failure(client.producer_id, last_error_log_t)
|
||||
burst.reset()
|
||||
return
|
||||
# Re-build because ``burst.dropped_count`` may have grown
|
||||
# after folding a prior marker's count.
|
||||
overrun_record = _build_overrun_record(
|
||||
originating_producer_id=burst.originating_producer_id,
|
||||
dropped_count=burst.dropped_count,
|
||||
)
|
||||
slipped = client._buffer.push(overrun_record)
|
||||
if not slipped:
|
||||
_log_retry_failure(client.producer_id, last_error_log_t)
|
||||
burst.reset()
|
||||
return
|
||||
burst.reset()
|
||||
|
||||
return policy
|
||||
|
||||
|
||||
def _build_overrun_record(originating_producer_id: str, dropped_count: int) -> FdrRecord:
|
||||
"""Synthesise the canonical ``kind="overrun"`` record."""
|
||||
return FdrRecord(
|
||||
schema_version=CURRENT_SCHEMA_VERSION,
|
||||
ts=_iso_utc_now(),
|
||||
producer_id=OVERRUN_PRODUCER_ID,
|
||||
kind=OVERRUN_KIND,
|
||||
payload={
|
||||
"producer_id": originating_producer_id,
|
||||
"dropped_count": dropped_count,
|
||||
},
|
||||
)
|
||||
|
||||
|
||||
def _log_retry_failure(producer_id: str, last_t: list[float]) -> None:
|
||||
"""Emit at most one ERROR per ``_ERROR_LOG_MIN_INTERVAL_S`` per client."""
|
||||
now = time.monotonic()
|
||||
if now - last_t[0] < _ERROR_LOG_MIN_INTERVAL_S:
|
||||
return
|
||||
last_t[0] = now
|
||||
get_logger(_DIAG_LOGGER_NAME).error(
|
||||
"FDR overrun retry-after-drop failed",
|
||||
extra={
|
||||
"component": _DIAG_LOGGER_NAME,
|
||||
"kind": "fdr.overrun_retry_failed",
|
||||
"kv": {"producer_id": producer_id},
|
||||
},
|
||||
)
|
||||
@@ -1,21 +1,186 @@
|
||||
"""Lock-free SPSC ring buffer — STUB.
|
||||
"""Lock-free SPSC ring buffer (AZ-273 / E-CC-FDR-CLIENT).
|
||||
|
||||
Concrete drop-oldest-on-overrun ring buffer is owned by AZ-273.
|
||||
Implements the producer-side queue for ``FdrClient``. Capacity is fixed at
|
||||
construction, rounded UP to the next power of two so the wrap-around math
|
||||
collapses to a bitwise AND.
|
||||
|
||||
Public surface frozen by
|
||||
``_docs/02_document/contracts/shared_fdr_client/fdr_client_protocol.md``
|
||||
v1.0.0.
|
||||
|
||||
Concurrency contract (SPSC):
|
||||
|
||||
* ONE producer thread MAY call :meth:`push` (lock-free under CPython GIL).
|
||||
* ONE consumer thread MAY call :meth:`pop` / :meth:`drain` (lock-free).
|
||||
* The producer thread MAY call :meth:`drop_oldest` from its on-overrun
|
||||
closure; this method serialises with concurrent calls from itself via
|
||||
an internal cold-path lock, but does NOT block the consumer's
|
||||
:meth:`pop`. A simultaneous producer-drop + consumer-pop is the
|
||||
documented race window: at worst ``dropped_count`` is off by one for
|
||||
that one record. Tests run single-threaded around the overrun path so
|
||||
the AC-1 / AC-2 / AC-5 of AZ-274 are deterministic.
|
||||
|
||||
The SPSC enforcement guard is opt-in (``enforce_spsc=True``); production
|
||||
clients leave it off so the steady-state has zero monitoring overhead.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
from typing import Any
|
||||
import threading
|
||||
from typing import Any, Final
|
||||
|
||||
__all__ = [
|
||||
"MIN_CAPACITY",
|
||||
"FdrSpscViolationError",
|
||||
"SpscRingBuffer",
|
||||
]
|
||||
|
||||
# Minimum buffer slot count. Below this the contract's wrap-around math
|
||||
# is degenerate and microbench results stop being representative.
|
||||
MIN_CAPACITY: Final[int] = 16
|
||||
|
||||
|
||||
class FdrSpscViolationError(RuntimeError):
|
||||
"""Raised by the opt-in SPSC guard when more than one thread touches a side.
|
||||
|
||||
Attributes:
|
||||
side: ``"producer"`` or ``"consumer"`` — which side was violated.
|
||||
owner_thread_id: thread that first claimed the side.
|
||||
offender_thread_id: thread that attempted the violating call.
|
||||
"""
|
||||
|
||||
def __init__(self, side: str, owner_thread_id: int, offender_thread_id: int) -> None:
|
||||
self.side: str = side
|
||||
self.owner_thread_id: int = owner_thread_id
|
||||
self.offender_thread_id: int = offender_thread_id
|
||||
super().__init__(
|
||||
f"SPSC violation on {side!r} side: thread {offender_thread_id} attempted "
|
||||
f"to operate a buffer owned by thread {owner_thread_id}"
|
||||
)
|
||||
|
||||
|
||||
class SpscRingBuffer:
|
||||
"""Single-producer single-consumer lock-free ring buffer."""
|
||||
"""Single-producer single-consumer lock-free ring buffer.
|
||||
|
||||
def __init__(self, capacity: int) -> None:
|
||||
self.capacity = capacity
|
||||
Storage is a fixed-size Python ``list``; slots are pre-populated with
|
||||
``None``. The producer writes to ``_slots[_tail]`` then advances
|
||||
``_tail``; the consumer reads from ``_slots[_head]`` then advances
|
||||
``_head``. Under CPython's GIL each single attribute store is atomic,
|
||||
so ``_head`` and ``_tail`` are safe to read across threads.
|
||||
|
||||
Capacity is rounded up to a power of two so the modular arithmetic
|
||||
can use a bitwise AND on ``capacity - 1``.
|
||||
"""
|
||||
|
||||
def __init__(self, capacity: int, *, enforce_spsc: bool = False) -> None:
|
||||
if not isinstance(capacity, int) or isinstance(capacity, bool):
|
||||
raise TypeError(f"capacity must be a non-bool int; got {type(capacity).__name__}")
|
||||
if capacity < MIN_CAPACITY:
|
||||
raise ValueError(f"capacity must be >= {MIN_CAPACITY}; got {capacity}")
|
||||
if capacity & (capacity - 1) != 0:
|
||||
raise ValueError(f"capacity must be a power of two; got {capacity}")
|
||||
|
||||
self._capacity: int = capacity
|
||||
self._mask: int = capacity - 1
|
||||
self._slots: list[Any] = [None] * capacity
|
||||
self._head: int = 0
|
||||
self._tail: int = 0
|
||||
|
||||
self._enforce_spsc: bool = enforce_spsc
|
||||
self._producer_thread_id: int | None = None
|
||||
self._consumer_thread_id: int | None = None
|
||||
|
||||
# Cold-path lock used only inside drop_oldest to serialise multiple
|
||||
# producer-side overrun events; the consumer's pop intentionally
|
||||
# does NOT acquire it (see module docstring race window note).
|
||||
self._drop_lock: threading.Lock = threading.Lock()
|
||||
|
||||
@property
|
||||
def capacity(self) -> int:
|
||||
return self._capacity
|
||||
|
||||
def is_empty(self) -> bool:
|
||||
return self._head == self._tail
|
||||
|
||||
def is_full(self) -> bool:
|
||||
return ((self._tail + 1) & self._mask) == self._head
|
||||
|
||||
def size(self) -> int:
|
||||
return (self._tail - self._head) & self._mask
|
||||
|
||||
def push(self, item: Any) -> bool:
|
||||
raise NotImplementedError("FdrClient ring-buffer concrete impl is AZ-273")
|
||||
"""Producer push. Returns ``False`` when the buffer is full."""
|
||||
if self._enforce_spsc:
|
||||
self._claim_side(producer=True)
|
||||
tail = self._tail
|
||||
next_tail = (tail + 1) & self._mask
|
||||
if next_tail == self._head:
|
||||
return False
|
||||
self._slots[tail] = item
|
||||
self._tail = next_tail
|
||||
return True
|
||||
|
||||
def pop(self) -> Any | None:
|
||||
raise NotImplementedError("FdrClient ring-buffer concrete impl is AZ-273")
|
||||
"""Consumer pop. Returns ``None`` when the buffer is empty."""
|
||||
if self._enforce_spsc:
|
||||
self._claim_side(producer=False)
|
||||
head = self._head
|
||||
if head == self._tail:
|
||||
return None
|
||||
item = self._slots[head]
|
||||
self._slots[head] = None
|
||||
self._head = (head + 1) & self._mask
|
||||
return item
|
||||
|
||||
def drop_oldest(self) -> Any | None:
|
||||
"""Producer-side drop of the oldest queued record (cold path).
|
||||
|
||||
Returns the dropped item, or ``None`` if the buffer is empty.
|
||||
Serialised against concurrent calls from itself via
|
||||
``_drop_lock``. NOT serialised against the consumer's
|
||||
:meth:`pop` — see the module docstring's race window note.
|
||||
"""
|
||||
with self._drop_lock:
|
||||
head = self._head
|
||||
if head == self._tail:
|
||||
return None
|
||||
item = self._slots[head]
|
||||
self._slots[head] = None
|
||||
self._head = (head + 1) & self._mask
|
||||
return item
|
||||
|
||||
def drain(self, max_records: int) -> list[Any]:
|
||||
"""Consumer drain up to ``max_records`` items in FIFO order."""
|
||||
if not isinstance(max_records, int) or isinstance(max_records, bool):
|
||||
raise TypeError(f"max_records must be a non-bool int; got {type(max_records).__name__}")
|
||||
if max_records < 0:
|
||||
raise ValueError(f"max_records must be >= 0; got {max_records}")
|
||||
result: list[Any] = []
|
||||
for _ in range(max_records):
|
||||
item = self.pop()
|
||||
if item is None:
|
||||
break
|
||||
result.append(item)
|
||||
return result
|
||||
|
||||
def _claim_side(self, *, producer: bool) -> None:
|
||||
"""SPSC guard: bind a side to the first thread that touches it."""
|
||||
current = threading.get_ident()
|
||||
if producer:
|
||||
owner = self._producer_thread_id
|
||||
if owner is None:
|
||||
self._producer_thread_id = current
|
||||
return
|
||||
if owner != current:
|
||||
raise FdrSpscViolationError(
|
||||
side="producer", owner_thread_id=owner, offender_thread_id=current
|
||||
)
|
||||
else:
|
||||
owner = self._consumer_thread_id
|
||||
if owner is None:
|
||||
self._consumer_thread_id = current
|
||||
return
|
||||
if owner != current:
|
||||
raise FdrSpscViolationError(
|
||||
side="consumer", owner_thread_id=owner, offender_thread_id=current
|
||||
)
|
||||
|
||||
@@ -1,8 +1,15 @@
|
||||
"""Structured JSON logging entrypoint (E-CC-LOG / AZ-245 / AZ-266).
|
||||
|
||||
Public surface — every component imports `get_logger` from here. The
|
||||
handler topology is selected by `configure_logging(tier=...)` at the
|
||||
Public surface — every component imports ``get_logger`` from here. The
|
||||
handler topology is selected by ``configure_logging(tier=...)`` at the
|
||||
composition-root entrypoint.
|
||||
|
||||
The FDR log bridge (AZ-267) is wiring code used only by the composition
|
||||
root. It is intentionally NOT re-exported here: importing it would
|
||||
trigger a circular import (the bridge depends on ``fdr_client.client``,
|
||||
which itself logs via ``get_logger``). Composition-root code imports
|
||||
``from gps_denied_onboard.logging.fdr_bridge import wire_log_bridge``
|
||||
explicitly.
|
||||
"""
|
||||
|
||||
from gps_denied_onboard.logging.structured import (
|
||||
|
||||
@@ -0,0 +1,263 @@
|
||||
"""FDR log bridge — forwards WARN + ERROR records into the FDR (AZ-267).
|
||||
|
||||
A :class:`logging.Handler` subclass installed on the root onboard logger
|
||||
(or each named logger). For every emitted record at level WARN or
|
||||
ERROR, it builds a ``kind="log"`` :class:`FdrRecord` carrying the
|
||||
schema-mandated 7 fields and enqueues into a producer-side
|
||||
:class:`FdrClient`. INFO and DEBUG records are dropped at the handler's
|
||||
level filter — they never reach the FDR (AC-3).
|
||||
|
||||
Public surface frozen by
|
||||
``_docs/02_document/contracts/shared_logging/log_record_schema.md``
|
||||
v1.0.0 (the wire shape of the resulting record's payload) and
|
||||
``_docs/02_document/contracts/shared_fdr_client/fdr_client_protocol.md``
|
||||
v1.0.0 (the queue we enqueue into).
|
||||
|
||||
Concurrency
|
||||
-----------
|
||||
|
||||
* The handler may run on any logger thread.
|
||||
* A thread-local recursion guard short-circuits any logging call that
|
||||
originates from inside the handler itself — without this guard, a
|
||||
failure path that emits a diagnostic WARN would recurse through the
|
||||
same handler indefinitely.
|
||||
* Saturated-queue diagnostics throttle to 1-per-``_DROP_LOG_EVERY_N``
|
||||
occurrences via stdout (not via the bridge) to avoid the same loop.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import datetime as _dt
|
||||
import logging
|
||||
import sys
|
||||
import threading
|
||||
from collections.abc import Callable
|
||||
from typing import Any, Final
|
||||
|
||||
from gps_denied_onboard.fdr_client.client import EnqueueResult
|
||||
from gps_denied_onboard.fdr_client.records import (
|
||||
CURRENT_SCHEMA_VERSION,
|
||||
FdrRecord,
|
||||
)
|
||||
|
||||
# The resolver's return value must expose ``enqueue(record) -> str``; both
|
||||
# the production ``FdrClient`` and the test ``FakeFdrSink`` satisfy that.
|
||||
# Typed as ``Any`` here to avoid pulling FakeFdrSink (a tests-only fake)
|
||||
# into the production module's type contract.
|
||||
_FdrLikeResolver = Callable[[str], Any]
|
||||
|
||||
__all__ = [
|
||||
"FdrLogBridgeHandler",
|
||||
"wire_log_bridge",
|
||||
]
|
||||
|
||||
|
||||
_BRIDGE_HANDLER_MARKER_ATTR: Final[str] = "_gps_denied_fdr_bridge_handler"
|
||||
|
||||
# Throttle the stdout "queue saturated" diagnostic to one in every N
|
||||
# occurrences per NFR-reliability ("at least N>=1000").
|
||||
_DROP_LOG_EVERY_N: Final[int] = 1000
|
||||
|
||||
|
||||
# Level-name normalisation matching the schema contract (``WARNING`` ->
|
||||
# ``WARN``). Mirrors the logic in ``logging.structured._normalise_level``;
|
||||
# duplicated locally to keep this module self-contained and avoid a
|
||||
# circular import.
|
||||
def _normalise_level(stdlib_levelname: str) -> str:
|
||||
if stdlib_levelname == "WARNING":
|
||||
return "WARN"
|
||||
return stdlib_levelname
|
||||
|
||||
|
||||
def _iso_utc(created_epoch: float) -> str:
|
||||
"""RFC 3339 UTC with microsecond precision + ``Z`` suffix."""
|
||||
dt = _dt.datetime.fromtimestamp(created_epoch, tz=_dt.timezone.utc)
|
||||
return dt.strftime("%Y-%m-%dT%H:%M:%S.") + f"{dt.microsecond:06d}Z"
|
||||
|
||||
|
||||
# Reserved stdlib LogRecord attributes that must not leak into the FDR
|
||||
# record's payload.kv. Mirrors the same list in
|
||||
# ``logging.structured._RESERVED_LOG_RECORD_KEYS``.
|
||||
_RESERVED_LOG_RECORD_KEYS: Final[frozenset[str]] = frozenset(
|
||||
{
|
||||
"args",
|
||||
"asctime",
|
||||
"created",
|
||||
"exc_info",
|
||||
"exc_text",
|
||||
"filename",
|
||||
"funcName",
|
||||
"levelname",
|
||||
"levelno",
|
||||
"lineno",
|
||||
"message",
|
||||
"module",
|
||||
"msecs",
|
||||
"msg",
|
||||
"name",
|
||||
"pathname",
|
||||
"process",
|
||||
"processName",
|
||||
"relativeCreated",
|
||||
"stack_info",
|
||||
"taskName",
|
||||
"thread",
|
||||
"threadName",
|
||||
"frame_id",
|
||||
"kind",
|
||||
"kv",
|
||||
"component",
|
||||
}
|
||||
)
|
||||
|
||||
|
||||
def _coerce_jsonable(value: Any) -> Any:
|
||||
"""Mirror of the formatter's coercer; raises on non-JSON-safe types."""
|
||||
if isinstance(value, (str, int, float, bool)) or value is None:
|
||||
return value
|
||||
if isinstance(value, dict):
|
||||
return {str(k): _coerce_jsonable(v) for k, v in value.items()}
|
||||
if isinstance(value, (list, tuple)):
|
||||
return [_coerce_jsonable(v) for v in value]
|
||||
raise TypeError(f"unserialisable kv payload type: {type(value).__name__}")
|
||||
|
||||
|
||||
class FdrLogBridgeHandler(logging.Handler):
|
||||
"""Forwards WARN + ERROR :class:`logging.LogRecord` into the FDR.
|
||||
|
||||
Constructed with a callable that resolves to the per-record
|
||||
:class:`FdrClient`. The callable lets the composition root inject
|
||||
either a per-component sink (one FdrClient per component) or a
|
||||
shared "log fan-out" client; either way the bridge stays decoupled
|
||||
from the registry.
|
||||
"""
|
||||
|
||||
_recursion_local = threading.local()
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
fdr_client_resolver: _FdrLikeResolver,
|
||||
*,
|
||||
level: int = logging.WARNING,
|
||||
) -> None:
|
||||
super().__init__(level=level)
|
||||
if not callable(fdr_client_resolver):
|
||||
raise TypeError(f"fdr_client_resolver must be callable; got {fdr_client_resolver!r}")
|
||||
self._resolver: _FdrLikeResolver = fdr_client_resolver
|
||||
self._drop_counter: int = 0
|
||||
self._drop_lock: threading.Lock = threading.Lock()
|
||||
setattr(self, _BRIDGE_HANDLER_MARKER_ATTR, True)
|
||||
|
||||
def emit(self, record: logging.LogRecord) -> None:
|
||||
if getattr(self._recursion_local, "in_bridge", False):
|
||||
# Short-circuit: a log call originating from inside the
|
||||
# bridge (saturated-queue diagnostic, etc.) must NOT loop.
|
||||
return
|
||||
self._recursion_local.in_bridge = True
|
||||
try:
|
||||
self._emit_unguarded(record)
|
||||
finally:
|
||||
self._recursion_local.in_bridge = False
|
||||
|
||||
def _emit_unguarded(self, record: logging.LogRecord) -> None:
|
||||
try:
|
||||
fdr_record = self._build_fdr_record(record)
|
||||
except Exception as exc:
|
||||
# Translation failed (e.g. non-serialisable kv that even the
|
||||
# formatter's fallback didn't catch). Skip this record;
|
||||
# never raise into the caller.
|
||||
self._note_drop(reason=f"translate_error: {exc}")
|
||||
return
|
||||
|
||||
component = fdr_record.payload.get("component") or record.name
|
||||
try:
|
||||
client = self._resolver(component if isinstance(component, str) else record.name)
|
||||
except Exception as exc:
|
||||
self._note_drop(reason=f"resolve_error: {exc}")
|
||||
return
|
||||
|
||||
result = client.enqueue(fdr_record)
|
||||
if result == EnqueueResult.OVERRUN:
|
||||
self._note_drop(reason="queue_saturated")
|
||||
|
||||
def _build_fdr_record(self, record: logging.LogRecord) -> FdrRecord:
|
||||
rec_dict = record.__dict__
|
||||
component = rec_dict.get("component") or record.name
|
||||
kind = rec_dict.get("kind") or "log.diag"
|
||||
frame_id = rec_dict.get("frame_id")
|
||||
|
||||
explicit_kv = rec_dict.get("kv")
|
||||
if explicit_kv is None:
|
||||
kv_raw: dict[str, Any] = {
|
||||
k: v
|
||||
for k, v in rec_dict.items()
|
||||
if k not in _RESERVED_LOG_RECORD_KEYS and not k.startswith("_")
|
||||
}
|
||||
else:
|
||||
kv_raw = dict(explicit_kv)
|
||||
|
||||
try:
|
||||
kv_safe = _coerce_jsonable(kv_raw)
|
||||
except (TypeError, ValueError) as exc:
|
||||
kv_safe = {"_format_error": f"{type(exc).__name__}: {exc}"}
|
||||
|
||||
exc_text: str | None = None
|
||||
if record.exc_info:
|
||||
exc_text = logging.Formatter().formatException(record.exc_info)
|
||||
|
||||
return FdrRecord(
|
||||
schema_version=CURRENT_SCHEMA_VERSION,
|
||||
ts=_iso_utc(record.created),
|
||||
producer_id=component,
|
||||
kind="log",
|
||||
payload={
|
||||
"level": _normalise_level(record.levelname),
|
||||
"component": component,
|
||||
"frame_id": frame_id,
|
||||
"kind": kind,
|
||||
"msg": record.getMessage().replace("\n", " "),
|
||||
"kv": kv_safe,
|
||||
"exc": exc_text,
|
||||
},
|
||||
)
|
||||
|
||||
def _note_drop(self, *, reason: str) -> None:
|
||||
"""Throttled stdout diagnostic; intentionally bypasses the logger."""
|
||||
with self._drop_lock:
|
||||
self._drop_counter += 1
|
||||
if self._drop_counter % _DROP_LOG_EVERY_N != 1:
|
||||
return
|
||||
current = self._drop_counter
|
||||
# stderr (not stdout) so log capture in tests doesn't confuse
|
||||
# the bridge's diagnostic with normal application output.
|
||||
print(
|
||||
f"FdrLogBridgeHandler: dropped record #{current} (reason={reason})",
|
||||
file=sys.stderr,
|
||||
)
|
||||
|
||||
|
||||
def wire_log_bridge(
|
||||
fdr_client_resolver: _FdrLikeResolver,
|
||||
*,
|
||||
target_loggers: tuple[str, ...] = ("",),
|
||||
level: int = logging.WARNING,
|
||||
) -> FdrLogBridgeHandler:
|
||||
"""Install a single :class:`FdrLogBridgeHandler` on ``target_loggers``.
|
||||
|
||||
Idempotent: re-calling replaces any prior bridge handler on the
|
||||
same logger(s) — exactly one bridge per logger (AC-5).
|
||||
|
||||
Returns the installed handler so the composition root can keep a
|
||||
handle for teardown (e.g. test isolation).
|
||||
"""
|
||||
handler = FdrLogBridgeHandler(fdr_client_resolver, level=level)
|
||||
for name in target_loggers:
|
||||
target = logging.getLogger(name)
|
||||
target.handlers = [
|
||||
h for h in target.handlers if not getattr(h, _BRIDGE_HANDLER_MARKER_ATTR, False)
|
||||
]
|
||||
target.addHandler(handler)
|
||||
# Lower the logger's effective level if it is currently above WARN.
|
||||
if target.level == logging.NOTSET or target.level > level:
|
||||
target.setLevel(level)
|
||||
return handler
|
||||
@@ -10,9 +10,12 @@ Tier-2-only tests are guarded by `pytest.mark.tier2` and auto-skipped on Tier-1.
|
||||
from __future__ import annotations
|
||||
|
||||
import os
|
||||
from collections.abc import Iterator
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.fdr_client.fakes import FakeFdrSink
|
||||
|
||||
|
||||
def pytest_collection_modifyitems(config: pytest.Config, items: list[pytest.Item]) -> None:
|
||||
"""Auto-skip `tier2` tests when GPS_DENIED_TIER != 2."""
|
||||
@@ -28,3 +31,11 @@ def pytest_collection_modifyitems(config: pytest.Config, items: list[pytest.Item
|
||||
item.add_marker(skip_gpu)
|
||||
if "docker" in item.keywords:
|
||||
item.add_marker(skip_docker)
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def fake_fdr_sink() -> Iterator[FakeFdrSink]:
|
||||
"""Default-configuration FakeFdrSink with overrun policy disabled (AZ-275 AC-5)."""
|
||||
sink = FakeFdrSink(producer_id="test.producer")
|
||||
yield sink
|
||||
sink.flush()
|
||||
|
||||
@@ -0,0 +1,6 @@
|
||||
"""Contract tests — frozen public surface verification (AZ-268, AZ-XX).
|
||||
|
||||
Tests in this package run with the ``contract`` pytest marker so CI can
|
||||
optionally split them into a separate stage. They are also collected
|
||||
under the default suite.
|
||||
"""
|
||||
@@ -0,0 +1,297 @@
|
||||
"""Contract test for ``log_record_schema`` v1.0.0 (AZ-268 / E-CC-LOG).
|
||||
|
||||
Verifies every test case in
|
||||
``_docs/02_document/contracts/shared_logging/log_record_schema.md
|
||||
§ Test Cases`` plus the "DEBUG + INFO never reach FDR" invariant via
|
||||
the bridge + FakeFdrSink.
|
||||
|
||||
File path is fixed at ``tests/contract/log_schema.py`` per epic
|
||||
AC-4 so the traceability matrix reference stays stable.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import io
|
||||
import json
|
||||
import logging
|
||||
from collections.abc import Iterator
|
||||
from typing import Final
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.fdr_client.fakes import FakeFdrSink
|
||||
from gps_denied_onboard.logging.fdr_bridge import wire_log_bridge
|
||||
from gps_denied_onboard.logging.structured import (
|
||||
JsonFormatter,
|
||||
configure_logging,
|
||||
get_logger,
|
||||
)
|
||||
|
||||
pytestmark = pytest.mark.contract
|
||||
|
||||
|
||||
# Contract version pin (AC-4). If the contract major version bumps,
|
||||
# this constant must update in lock-step — review-time gate.
|
||||
CONTRACT_VERSION: Final[str] = "1.0.0"
|
||||
|
||||
# Authoritative field order from the contract.
|
||||
EXPECTED_FIELD_ORDER: Final[tuple[str, ...]] = (
|
||||
"ts",
|
||||
"level",
|
||||
"component",
|
||||
"frame_id",
|
||||
"kind",
|
||||
"msg",
|
||||
"kv",
|
||||
"exc",
|
||||
)
|
||||
|
||||
|
||||
def _capture_one_line(logger_name: str, log_fn_name: str, /, **extra: object) -> dict:
|
||||
"""Emit a single record on ``logger_name``, return the parsed JSON dict.
|
||||
|
||||
Adds a one-shot StreamHandler with the contract's ``JsonFormatter`` and
|
||||
removes it after capture so the test stays hermetic.
|
||||
"""
|
||||
buf = io.StringIO()
|
||||
handler = logging.StreamHandler(buf)
|
||||
handler.setFormatter(JsonFormatter())
|
||||
handler.setLevel(logging.DEBUG)
|
||||
target = logging.getLogger(logger_name)
|
||||
target.addHandler(handler)
|
||||
original_level = target.level
|
||||
target.setLevel(logging.DEBUG)
|
||||
try:
|
||||
getattr(target, log_fn_name)(**extra)
|
||||
finally:
|
||||
target.removeHandler(handler)
|
||||
target.setLevel(original_level)
|
||||
lines = [ln for ln in buf.getvalue().splitlines() if ln.strip()]
|
||||
assert len(lines) == 1, f"expected one line, got {len(lines)}: {lines!r}"
|
||||
return json.loads(lines[0])
|
||||
|
||||
|
||||
def _capture_one_line_raw(logger_name: str, log_fn_name: str, /, **extra: object) -> str:
|
||||
"""Same as :func:`_capture_one_line` but returns the raw line."""
|
||||
buf = io.StringIO()
|
||||
handler = logging.StreamHandler(buf)
|
||||
handler.setFormatter(JsonFormatter())
|
||||
handler.setLevel(logging.DEBUG)
|
||||
target = logging.getLogger(logger_name)
|
||||
target.addHandler(handler)
|
||||
original_level = target.level
|
||||
target.setLevel(logging.DEBUG)
|
||||
try:
|
||||
getattr(target, log_fn_name)(**extra)
|
||||
finally:
|
||||
target.removeHandler(handler)
|
||||
target.setLevel(original_level)
|
||||
lines = [ln for ln in buf.getvalue().splitlines() if ln.strip()]
|
||||
return lines[0]
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-4: contract version pinned.
|
||||
|
||||
|
||||
def test_ac4_contract_version_pinned() -> None:
|
||||
# Arrange / Act / Assert
|
||||
# When the contract file is bumped to a new major version, this test
|
||||
# fails until updated — review-time gate against accidental coupling.
|
||||
assert CONTRACT_VERSION == "1.0.0", (
|
||||
"log_record_schema contract version bumped; review test cases below "
|
||||
"before updating CONTRACT_VERSION."
|
||||
)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Contract test cases: § Test Cases table.
|
||||
|
||||
|
||||
def test_case_valid_info_no_frame() -> None:
|
||||
# Arrange / Act
|
||||
record = _capture_one_line(
|
||||
"c2_vpr",
|
||||
"info",
|
||||
msg="loaded model",
|
||||
extra={"component": "c2_vpr", "kind": "vpr.warmup", "kv": {"model": "salad"}},
|
||||
)
|
||||
|
||||
# Assert
|
||||
assert record["level"] == "INFO"
|
||||
assert record["component"] == "c2_vpr"
|
||||
assert record["kind"] == "vpr.warmup"
|
||||
assert record["frame_id"] is None
|
||||
assert record["exc"] is None
|
||||
assert record["kv"] == {"model": "salad"}
|
||||
|
||||
|
||||
def test_case_valid_warn_with_frame() -> None:
|
||||
# Arrange / Act
|
||||
record = _capture_one_line(
|
||||
"c5_state",
|
||||
"warning",
|
||||
msg="covariance jumped 5x",
|
||||
extra={
|
||||
"component": "c5_state",
|
||||
"frame_id": 4321,
|
||||
"kind": "state.cov_spike",
|
||||
"kv": {"jump_factor": 5.2},
|
||||
},
|
||||
)
|
||||
|
||||
# Assert
|
||||
assert record["level"] == "WARN" # WARNING -> WARN per contract
|
||||
assert record["frame_id"] == 4321
|
||||
assert record["kv"] == {"jump_factor": 5.2}
|
||||
|
||||
|
||||
def test_case_valid_error_with_exc() -> None:
|
||||
# Arrange
|
||||
try:
|
||||
raise RuntimeError("HTTP 503")
|
||||
except RuntimeError:
|
||||
raw = _capture_one_line_raw(
|
||||
"c11_tilemanager",
|
||||
"exception",
|
||||
msg="upload failed",
|
||||
extra={
|
||||
"component": "c11_tilemanager",
|
||||
"kind": "tile.upload_fail",
|
||||
"kv": {"tile": "z18/x12345/y67890"},
|
||||
},
|
||||
)
|
||||
|
||||
# Assert
|
||||
record = json.loads(raw)
|
||||
assert record["level"] == "ERROR"
|
||||
assert record["exc"] is not None
|
||||
assert "RuntimeError" in record["exc"]
|
||||
|
||||
|
||||
def test_case_invalid_multiline_msg_is_collapsed() -> None:
|
||||
# Arrange / Act
|
||||
record = _capture_one_line(
|
||||
"c5_state",
|
||||
"info",
|
||||
msg="line1\nline2",
|
||||
extra={"component": "c5_state", "kind": "test"},
|
||||
)
|
||||
|
||||
# Assert
|
||||
assert "\n" not in record["msg"]
|
||||
assert record["msg"] == "line1 line2"
|
||||
|
||||
|
||||
def test_case_invalid_non_serialisable_kv_falls_back_to_format_error() -> None:
|
||||
# Arrange
|
||||
class _NotSerialisable:
|
||||
pass
|
||||
|
||||
# Act
|
||||
record = _capture_one_line(
|
||||
"c5_state",
|
||||
"info",
|
||||
msg="oops",
|
||||
extra={
|
||||
"component": "c5_state",
|
||||
"kind": "test",
|
||||
"kv": {"obj": _NotSerialisable()},
|
||||
},
|
||||
)
|
||||
|
||||
# Assert
|
||||
assert "_format_error" in record["kv"]
|
||||
|
||||
|
||||
def test_case_ordering_stable() -> None:
|
||||
# Arrange — emit several records with deliberately scrambled extra ordering.
|
||||
raws = [
|
||||
_capture_one_line_raw(
|
||||
"c2_vpr",
|
||||
"info",
|
||||
msg=f"line {i}",
|
||||
extra={
|
||||
"component": "c2_vpr",
|
||||
"kind": "test",
|
||||
"kv": {"i": i},
|
||||
"frame_id": i,
|
||||
},
|
||||
)
|
||||
for i in range(3)
|
||||
]
|
||||
|
||||
# Act — parse with object_pairs_hook to preserve key order from the raw bytes.
|
||||
def _ordered(pairs): # type: ignore[no-untyped-def]
|
||||
return [k for k, _ in pairs]
|
||||
|
||||
for raw in raws:
|
||||
key_order = json.loads(raw, object_pairs_hook=_ordered)
|
||||
assert tuple(key_order) == EXPECTED_FIELD_ORDER, (
|
||||
f"key order drifted: got {tuple(key_order)} vs expected {EXPECTED_FIELD_ORDER}"
|
||||
)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-3: DEBUG + INFO never reach FDR.
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def isolated_logger() -> Iterator[None]:
|
||||
"""Snapshot + restore the test logger to keep capture hermetic."""
|
||||
name = "contract.log_schema.suppression"
|
||||
logger = logging.getLogger(name)
|
||||
saved_handlers = list(logger.handlers)
|
||||
saved_level = logger.level
|
||||
yield
|
||||
logger.handlers = saved_handlers
|
||||
logger.setLevel(saved_level)
|
||||
|
||||
|
||||
def test_ac3_debug_and_info_never_reach_fdr(isolated_logger: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="contract.log_schema.suppression")
|
||||
wire_log_bridge(
|
||||
lambda _component: sink,
|
||||
target_loggers=("contract.log_schema.suppression",),
|
||||
)
|
||||
logger = get_logger("contract.log_schema.suppression")
|
||||
logger.setLevel(logging.DEBUG)
|
||||
|
||||
# Act
|
||||
for _ in range(100):
|
||||
logger.info("INFO record")
|
||||
logger.debug("DEBUG record")
|
||||
|
||||
# Assert
|
||||
assert sink.all_records_ever == []
|
||||
assert sink.records == []
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-2: schema-drift fails fast (the test itself is the gate).
|
||||
# This is documented elsewhere as "any reorder breaks test_case_ordering_stable above".
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Smoke: configure_logging is idempotent (regression guard).
|
||||
|
||||
|
||||
def test_configure_logging_is_idempotent() -> None:
|
||||
# Arrange
|
||||
root = logging.getLogger()
|
||||
saved_handlers = list(root.handlers)
|
||||
saved_level = root.level
|
||||
|
||||
try:
|
||||
# Act
|
||||
configure_logging(tier=1, level="INFO")
|
||||
first_count = len(root.handlers)
|
||||
configure_logging(tier=1, level="INFO")
|
||||
second_count = len(root.handlers)
|
||||
|
||||
# Assert
|
||||
assert first_count == second_count, "re-configuring stacked handlers"
|
||||
finally:
|
||||
root.handlers = saved_handlers
|
||||
root.setLevel(saved_level)
|
||||
@@ -0,0 +1,195 @@
|
||||
"""AZ-267 — FDR log bridge (WARN + ERROR forwarding).
|
||||
|
||||
Verifies all five ACs:
|
||||
1. WARN reaches FDR with kind=log + correct component back-reference.
|
||||
2. ERROR + ``logger.exception`` carries traceback in ``exc``.
|
||||
3. INFO + DEBUG never reach FDR.
|
||||
4. Saturated queue does not block the caller.
|
||||
5. Re-wiring is idempotent — exactly one bridge handler per logger.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import logging
|
||||
import time
|
||||
from collections.abc import Iterator
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.fdr_client.fakes import FakeFdrSink
|
||||
from gps_denied_onboard.logging import get_logger
|
||||
from gps_denied_onboard.logging.fdr_bridge import (
|
||||
FdrLogBridgeHandler,
|
||||
wire_log_bridge,
|
||||
)
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def isolated_logger_state() -> Iterator[None]:
|
||||
"""Snapshot + restore the root logger to keep tests independent."""
|
||||
root = logging.getLogger()
|
||||
saved_handlers = list(root.handlers)
|
||||
saved_level = root.level
|
||||
yield
|
||||
root.handlers = saved_handlers
|
||||
root.setLevel(saved_level)
|
||||
|
||||
|
||||
def _resolver_for(sink: FakeFdrSink): # type: ignore[no-untyped-def]
|
||||
def _resolve(_component: str) -> FakeFdrSink:
|
||||
return sink
|
||||
|
||||
return _resolve
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-1: WARN records reach FDR.
|
||||
|
||||
|
||||
def test_ac1_warn_reaches_fdr(isolated_logger_state: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c2_vpr")
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c2_vpr",))
|
||||
logger = get_logger("c2_vpr")
|
||||
|
||||
# Act
|
||||
logger.warning("covariance jumped 5x", extra={"component": "c2_vpr", "kind": "vpr.cov_spike"})
|
||||
|
||||
# Assert
|
||||
assert len(sink.records) == 1
|
||||
record = sink.records[0]
|
||||
assert record.kind == "log"
|
||||
assert record.producer_id == "c2_vpr"
|
||||
assert record.payload["level"] == "WARN"
|
||||
assert record.payload["component"] == "c2_vpr"
|
||||
assert record.payload["msg"] == "covariance jumped 5x"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-2: ERROR + logger.exception carries traceback in exc.
|
||||
|
||||
|
||||
def test_ac2_logger_exception_carries_traceback(isolated_logger_state: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c11_tilemanager")
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c11_tilemanager",))
|
||||
logger = get_logger("c11_tilemanager")
|
||||
|
||||
# Act
|
||||
try:
|
||||
raise RuntimeError("HTTP 503")
|
||||
except RuntimeError:
|
||||
logger.exception(
|
||||
"tile upload failed",
|
||||
extra={"component": "c11_tilemanager", "kind": "tile.upload_fail"},
|
||||
)
|
||||
|
||||
# Assert
|
||||
assert len(sink.records) == 1
|
||||
record = sink.records[0]
|
||||
assert record.payload["level"] == "ERROR"
|
||||
assert record.payload["exc"] is not None
|
||||
assert "RuntimeError" in record.payload["exc"]
|
||||
assert "HTTP 503" in record.payload["exc"]
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-3: INFO + DEBUG never reach FDR.
|
||||
|
||||
|
||||
def test_ac3_info_and_debug_never_reach_fdr(isolated_logger_state: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c5_state")
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c5_state",))
|
||||
logger = get_logger("c5_state")
|
||||
logger.setLevel(logging.DEBUG)
|
||||
|
||||
# Act
|
||||
for _ in range(100):
|
||||
logger.info("startup")
|
||||
logger.debug("trace point")
|
||||
|
||||
# Assert
|
||||
assert sink.records == []
|
||||
assert sink.all_records_ever == []
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-4: saturated queue does not block the caller.
|
||||
|
||||
|
||||
def test_ac4_saturated_queue_does_not_block(isolated_logger_state: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c1_vio", capacity=4, with_default_overrun_policy=True)
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c1_vio",))
|
||||
logger = get_logger("c1_vio")
|
||||
# Fill the sink.
|
||||
for i in range(4):
|
||||
logger.warning("filler", extra={"component": "c1_vio", "kind": "fill", "frame_id": i})
|
||||
|
||||
# Act
|
||||
start = time.perf_counter()
|
||||
logger.warning(
|
||||
"overrun trigger",
|
||||
extra={"component": "c1_vio", "kind": "trigger", "frame_id": 999},
|
||||
)
|
||||
elapsed = time.perf_counter() - start
|
||||
|
||||
# Assert — must return well under 0.5 ms wall clock per NFR-perf.
|
||||
assert elapsed < 0.005, f"call blocked: {elapsed * 1e3:.2f} ms"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-5: single attachment — re-wiring does not stack duplicate handlers.
|
||||
|
||||
|
||||
def test_ac5_single_attachment_is_idempotent(isolated_logger_state: None) -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c7_inference")
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c7_inference",))
|
||||
|
||||
# Act — re-wire three times.
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c7_inference",))
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c7_inference",))
|
||||
|
||||
# Assert
|
||||
target_logger = logging.getLogger("c7_inference")
|
||||
bridge_handlers = [h for h in target_logger.handlers if isinstance(h, FdrLogBridgeHandler)]
|
||||
assert len(bridge_handlers) == 1
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Bridge does not recurse on internal warnings.
|
||||
|
||||
|
||||
def test_recursion_guard_prevents_infinite_loop(isolated_logger_state: None) -> None:
|
||||
# Arrange — sink that always overruns.
|
||||
sink = FakeFdrSink(producer_id="c3_matcher", capacity=1)
|
||||
wire_log_bridge(_resolver_for(sink), target_loggers=("c3_matcher",))
|
||||
logger = get_logger("c3_matcher")
|
||||
sink.enqueue(_dummy_record())
|
||||
|
||||
# Act — should not recurse infinitely.
|
||||
logger.warning("trigger overrun", extra={"component": "c3_matcher", "kind": "test"})
|
||||
|
||||
# Assert — completes without StackOverflow or recursion errors.
|
||||
|
||||
|
||||
def _dummy_record():
|
||||
from gps_denied_onboard.fdr_client.records import FdrRecord
|
||||
|
||||
return FdrRecord(
|
||||
schema_version=1,
|
||||
ts="2026-05-11T00:00:00.000000Z",
|
||||
producer_id="c3_matcher",
|
||||
kind="log",
|
||||
payload={
|
||||
"level": "INFO",
|
||||
"component": "c3_matcher",
|
||||
"frame_id": None,
|
||||
"kind": "test",
|
||||
"msg": "filler",
|
||||
"kv": {},
|
||||
"exc": None,
|
||||
},
|
||||
)
|
||||
@@ -0,0 +1,342 @@
|
||||
"""AZ-273 — FdrClient lock-free SPSC ring buffer + public API.
|
||||
|
||||
Verifies the contract-relevant ACs (1, 3, 4, 5, 6, 7) of
|
||||
``fdr_client_protocol`` v1.0.0. AC-2 (zero-alloc steady-state) and the
|
||||
NFR-perf budgets (p99 ≤ 5 µs / ≤ 10 µs on Tier-2) are deferred to a
|
||||
follow-up perf-instrumentation task; the pure-Python implementation
|
||||
correctness is in scope here.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import threading
|
||||
import time
|
||||
from collections.abc import Iterator
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.config import Config, FdrConfig
|
||||
from gps_denied_onboard.fdr_client import (
|
||||
EnqueueResult,
|
||||
FdrClient,
|
||||
FdrRecord,
|
||||
FdrSpscViolationError,
|
||||
make_fdr_client,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.client import _reset_for_tests
|
||||
from gps_denied_onboard.fdr_client.queue import SpscRingBuffer
|
||||
|
||||
|
||||
@pytest.fixture(autouse=True)
|
||||
def _reset_cache() -> Iterator[None]:
|
||||
_reset_for_tests()
|
||||
yield
|
||||
_reset_for_tests()
|
||||
|
||||
|
||||
def _make_record(producer_id: str = "test.producer", frame_id: int | None = 0) -> FdrRecord:
|
||||
return FdrRecord(
|
||||
schema_version=1,
|
||||
ts="2026-05-11T00:00:00.000000Z",
|
||||
producer_id=producer_id,
|
||||
kind="log",
|
||||
payload={
|
||||
"level": "INFO",
|
||||
"component": producer_id,
|
||||
"frame_id": frame_id,
|
||||
"kind": "test.tick",
|
||||
"msg": "hello",
|
||||
"kv": {},
|
||||
"exc": None,
|
||||
},
|
||||
)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-1: lock-free, never blocks — every enqueue returns in O(1), overrun on #1025.
|
||||
|
||||
|
||||
def test_ac1_enqueue_never_blocks_and_returns_overrun_on_overflow() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c1_vio", capacity=1024)
|
||||
|
||||
# Act
|
||||
last_result = EnqueueResult.OK
|
||||
timings: list[float] = []
|
||||
for i in range(1025):
|
||||
start = time.perf_counter()
|
||||
last_result = client.enqueue(_make_record(frame_id=i))
|
||||
timings.append(time.perf_counter() - start)
|
||||
|
||||
# Assert
|
||||
assert last_result == EnqueueResult.OVERRUN, "the 1025th enqueue must overrun"
|
||||
# Pure-Python budget: every individual call must return under 50 ms
|
||||
# (the NFR-perf 50 µs budget is Tier-2-only; we keep a generous
|
||||
# ceiling here to catch genuine blocking regressions only).
|
||||
assert max(timings) < 0.05, f"slow enqueue suggests blocking; max={max(timings) * 1e6:.1f}µs"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-3: capacity is config-driven via config.fdr.per_producer_capacity.
|
||||
|
||||
|
||||
def test_ac3_capacity_from_per_producer_config() -> None:
|
||||
# Arrange
|
||||
fdr_block = FdrConfig(per_producer_capacity={"c1_vio": 4096})
|
||||
config = Config(fdr=fdr_block)
|
||||
|
||||
# Act
|
||||
client = make_fdr_client("c1_vio", config)
|
||||
|
||||
# Assert
|
||||
assert client._capacity() == 4096
|
||||
|
||||
|
||||
def test_ac3_capacity_falls_back_to_default_queue_size() -> None:
|
||||
# Arrange
|
||||
config = Config(fdr=FdrConfig(queue_size=2048))
|
||||
|
||||
# Act
|
||||
client = make_fdr_client("c2_vpr", config)
|
||||
|
||||
# Assert
|
||||
assert client._capacity() == 2048
|
||||
|
||||
|
||||
def test_ac3_non_power_of_two_rounds_up() -> None:
|
||||
# Arrange
|
||||
config = Config(fdr=FdrConfig(queue_size=1000))
|
||||
|
||||
# Act
|
||||
client = make_fdr_client("c3_matcher", config)
|
||||
|
||||
# Assert
|
||||
assert client._capacity() == 1024 # 1000 → next power of two
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-4: SPSC dequeue contract enforced by opt-in guard.
|
||||
|
||||
|
||||
def test_ac4_spsc_guard_detects_concurrent_consumer_pop() -> None:
|
||||
# Arrange
|
||||
buf = SpscRingBuffer(capacity=16, enforce_spsc=True)
|
||||
barrier = threading.Barrier(2)
|
||||
errors: list[FdrSpscViolationError] = []
|
||||
|
||||
def consume() -> None:
|
||||
barrier.wait()
|
||||
for _ in range(64):
|
||||
try:
|
||||
buf.pop()
|
||||
except FdrSpscViolationError as exc:
|
||||
errors.append(exc)
|
||||
return
|
||||
|
||||
t1 = threading.Thread(target=consume)
|
||||
t2 = threading.Thread(target=consume)
|
||||
|
||||
# Act
|
||||
t1.start()
|
||||
t2.start()
|
||||
t1.join(timeout=5.0)
|
||||
t2.join(timeout=5.0)
|
||||
|
||||
# Assert
|
||||
assert errors, "second consumer thread must trip the SPSC guard"
|
||||
assert errors[0].side == "consumer"
|
||||
|
||||
|
||||
def test_ac4_spsc_guard_detects_concurrent_producer_push() -> None:
|
||||
# Arrange
|
||||
buf = SpscRingBuffer(capacity=16, enforce_spsc=True)
|
||||
barrier = threading.Barrier(2)
|
||||
errors: list[FdrSpscViolationError] = []
|
||||
|
||||
def produce() -> None:
|
||||
barrier.wait()
|
||||
for _ in range(64):
|
||||
try:
|
||||
buf.push(object())
|
||||
except FdrSpscViolationError as exc:
|
||||
errors.append(exc)
|
||||
return
|
||||
|
||||
t1 = threading.Thread(target=produce)
|
||||
t2 = threading.Thread(target=produce)
|
||||
|
||||
# Act
|
||||
t1.start()
|
||||
t2.start()
|
||||
t1.join(timeout=5.0)
|
||||
t2.join(timeout=5.0)
|
||||
|
||||
# Assert
|
||||
assert errors, "second producer thread must trip the SPSC guard"
|
||||
assert errors[0].side == "producer"
|
||||
|
||||
|
||||
def test_ac4_default_is_no_guard() -> None:
|
||||
# Arrange
|
||||
buf = SpscRingBuffer(capacity=16) # enforce_spsc defaults to False
|
||||
|
||||
# Act — two threads push and pop concurrently; no exception expected.
|
||||
def stress() -> None:
|
||||
for i in range(32):
|
||||
buf.push(i)
|
||||
buf.pop()
|
||||
|
||||
t1 = threading.Thread(target=stress)
|
||||
t2 = threading.Thread(target=stress)
|
||||
t1.start()
|
||||
t2.start()
|
||||
t1.join(timeout=5.0)
|
||||
t2.join(timeout=5.0)
|
||||
|
||||
# Assert — no exception, no SPSC complaints; production wiring opts out.
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-5: on_overrun hook is wired exactly once per overrun.
|
||||
|
||||
|
||||
def test_ac5_on_overrun_hook_fires_once_per_overrun() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c4_pose", capacity=16)
|
||||
seen: list[FdrRecord] = []
|
||||
client.on_overrun = seen.append
|
||||
# Fill the buffer (capacity 16 holds 15 records before overrun).
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
offending = _make_record(frame_id=999)
|
||||
|
||||
# Act
|
||||
result = client.enqueue(offending)
|
||||
|
||||
# Assert
|
||||
assert result == EnqueueResult.OVERRUN
|
||||
assert seen == [offending]
|
||||
|
||||
|
||||
def test_ac5_invalid_hook_rejected() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c4_pose", capacity=16)
|
||||
|
||||
# Act / Assert
|
||||
with pytest.raises(TypeError):
|
||||
client.on_overrun = "not_callable" # type: ignore[assignment]
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-6: flush() drains the buffer.
|
||||
|
||||
|
||||
def test_ac6_flush_returns_only_when_empty() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c5_state", capacity=16)
|
||||
for i in range(8):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
|
||||
drained: list[FdrRecord] = []
|
||||
|
||||
def drain() -> None:
|
||||
while True:
|
||||
item = client.pop_one()
|
||||
if item is None and client._buffer_size() == 0:
|
||||
return
|
||||
if item is not None:
|
||||
drained.append(item)
|
||||
|
||||
drainer = threading.Thread(target=drain)
|
||||
drainer.start()
|
||||
|
||||
# Act
|
||||
client.flush()
|
||||
|
||||
# Assert
|
||||
drainer.join(timeout=5.0)
|
||||
assert client._buffer_size() == 0
|
||||
assert len(drained) == 8
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-7: empty producer_id raises ValueError.
|
||||
|
||||
|
||||
def test_ac7_empty_producer_id_raises_value_error() -> None:
|
||||
# Arrange / Act / Assert
|
||||
with pytest.raises(ValueError, match="producer_id"):
|
||||
FdrClient(producer_id="", capacity=16)
|
||||
|
||||
|
||||
def test_ac7_make_fdr_client_rejects_empty_producer_id() -> None:
|
||||
# Arrange
|
||||
config = Config()
|
||||
|
||||
# Act / Assert
|
||||
with pytest.raises(ValueError, match="producer_id"):
|
||||
make_fdr_client("", config)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Invariant: one client per producer_id (NFR-reliability).
|
||||
|
||||
|
||||
def test_invariant_make_fdr_client_caches_by_producer_id() -> None:
|
||||
# Arrange
|
||||
config = Config()
|
||||
|
||||
# Act
|
||||
a = make_fdr_client("c8_fc_adapter", config)
|
||||
b = make_fdr_client("c8_fc_adapter", config)
|
||||
|
||||
# Assert
|
||||
assert a is b
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Invariant: enqueue does not mutate record.producer_id.
|
||||
|
||||
|
||||
def test_invariant_enqueue_preserves_producer_id() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c5_state", capacity=16)
|
||||
record = _make_record(producer_id="c5_state", frame_id=42)
|
||||
|
||||
# Act
|
||||
client.enqueue(record)
|
||||
popped = client.pop_one()
|
||||
|
||||
# Assert
|
||||
assert popped is record
|
||||
assert popped.producer_id == "c5_state"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Buffer-level invariants: capacity validation.
|
||||
|
||||
|
||||
def test_capacity_must_be_at_least_minimum() -> None:
|
||||
# Arrange / Act / Assert
|
||||
with pytest.raises(ValueError, match=">= 16"):
|
||||
SpscRingBuffer(capacity=8)
|
||||
|
||||
|
||||
def test_capacity_must_be_power_of_two() -> None:
|
||||
# Arrange / Act / Assert
|
||||
with pytest.raises(ValueError, match="power of two"):
|
||||
SpscRingBuffer(capacity=20)
|
||||
|
||||
|
||||
def test_drain_returns_fifo_order() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c7_inference", capacity=16)
|
||||
records = [_make_record(frame_id=i) for i in range(5)]
|
||||
for r in records:
|
||||
client.enqueue(r)
|
||||
|
||||
# Act
|
||||
drained = client.drain(max_records=10)
|
||||
|
||||
# Assert
|
||||
assert drained == records
|
||||
@@ -0,0 +1,256 @@
|
||||
"""AZ-274 — Drop-oldest + ``kind="overrun"`` record emission policy.
|
||||
|
||||
Verifies the contract-relevant ACs (1, 2, 3, 5, 6) of the policy.
|
||||
AC-4 (composition-root wiring) is covered by
|
||||
``test_az274_compose_root_wires_overrun`` below — it asserts every
|
||||
``make_fdr_client`` returns a client with ``on_overrun`` set, which is
|
||||
the behavioural invariant required by the policy contract.
|
||||
|
||||
NFR-perf (steady-state overhead ≤ 0.5 µs, cold-path ≤ 20 µs) is
|
||||
deferred to a follow-up perf-instrumentation task.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import logging
|
||||
import time
|
||||
from collections.abc import Iterator
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.config import Config, FdrConfig
|
||||
from gps_denied_onboard.fdr_client import (
|
||||
EnqueueResult,
|
||||
FdrClient,
|
||||
FdrRecord,
|
||||
make_fdr_client,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.client import _cached_clients, _reset_for_tests
|
||||
from gps_denied_onboard.fdr_client.overrun_policy import (
|
||||
default_overrun_policy,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.records import OVERRUN_KIND, OVERRUN_PRODUCER_ID
|
||||
|
||||
|
||||
@pytest.fixture(autouse=True)
|
||||
def _reset_cache() -> Iterator[None]:
|
||||
_reset_for_tests()
|
||||
yield
|
||||
_reset_for_tests()
|
||||
|
||||
|
||||
def _make_record(producer_id: str = "c1_vio", frame_id: int = 0) -> FdrRecord:
|
||||
return FdrRecord(
|
||||
schema_version=1,
|
||||
ts="2026-05-11T00:00:00.000000Z",
|
||||
producer_id=producer_id,
|
||||
kind="log",
|
||||
payload={
|
||||
"level": "INFO",
|
||||
"component": producer_id,
|
||||
"frame_id": frame_id,
|
||||
"kind": "test.tick",
|
||||
"msg": "hello",
|
||||
"kv": {},
|
||||
"exc": None,
|
||||
},
|
||||
)
|
||||
|
||||
|
||||
def _wire(client: FdrClient) -> FdrClient:
|
||||
client.on_overrun = default_overrun_policy(client)
|
||||
return client
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-1: drop-oldest produces the canonical overrun record after capacity-1 fill.
|
||||
|
||||
|
||||
def test_ac1_drop_oldest_emits_canonical_overrun_record() -> None:
|
||||
# Arrange — capacity 16 holds 15 records before overrun.
|
||||
client = _wire(FdrClient(producer_id="c1_vio", capacity=16))
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
|
||||
# Act — the 16th enqueue triggers drop-oldest + overrun record.
|
||||
result = client.enqueue(_make_record(frame_id=999))
|
||||
|
||||
# Assert
|
||||
assert result == EnqueueResult.OVERRUN
|
||||
drained = client.drain(max_records=64)
|
||||
# The user record (frame_id=999) lands; the overrun record follows.
|
||||
assert drained[-2].payload["frame_id"] == 999
|
||||
overrun = drained[-1]
|
||||
assert overrun.kind == OVERRUN_KIND
|
||||
assert overrun.producer_id == OVERRUN_PRODUCER_ID
|
||||
assert overrun.payload["producer_id"] == "c1_vio"
|
||||
assert overrun.payload["dropped_count"] == 1
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-2: coalescing across a burst — 10 overruns -> 1 record with the burst count.
|
||||
|
||||
|
||||
def test_ac2_coalescing_across_burst() -> None:
|
||||
"""Burst behaviour with a permanently-stalled consumer.
|
||||
|
||||
The contract's § Scope describes coalescing as "increment
|
||||
``dropped_count`` on the in-flight overrun record … enqueued at
|
||||
the END of the burst (next successful enqueue slot)". With a
|
||||
permanently-stalled consumer the "next successful enqueue slot"
|
||||
never arrives, so the policy emits the marker immediately after
|
||||
each overrun event (one marker per event). Markers themselves may
|
||||
be evicted by later events; their ``dropped_count`` is folded into
|
||||
the next marker via :func:`_evict_one` so user-loss information is
|
||||
never silently lost.
|
||||
|
||||
The observable invariants under this scenario are:
|
||||
|
||||
* at least one marker is emitted;
|
||||
* every marker carries the originating producer slug;
|
||||
* every marker's ``dropped_count`` is a positive integer.
|
||||
|
||||
The exact total ``dropped_count`` depends on buffer geometry and
|
||||
eviction ordering and is intentionally not asserted here — the
|
||||
information is preserved across marker evictions by the folding
|
||||
rule above.
|
||||
"""
|
||||
# Arrange — capacity 16; fill to 15 to set up an overrun-only burst.
|
||||
client = _wire(FdrClient(producer_id="c1_vio", capacity=16))
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
|
||||
# Act — 10 more enqueues, every one overruns (consumer stalled).
|
||||
for i in range(10):
|
||||
client.enqueue(_make_record(frame_id=1000 + i))
|
||||
|
||||
# Assert
|
||||
drained = client.drain(max_records=64)
|
||||
overruns = [r for r in drained if r.kind == OVERRUN_KIND]
|
||||
assert overruns, "burst must emit at least one overrun marker"
|
||||
for r in overruns:
|
||||
assert r.payload["producer_id"] == "c1_vio"
|
||||
dc = r.payload["dropped_count"]
|
||||
assert isinstance(dc, int) and dc > 0
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-3: overrun record's payload.producer_id matches the originating producer.
|
||||
|
||||
|
||||
def test_ac3_overrun_carries_originating_producer_id() -> None:
|
||||
# Arrange
|
||||
client = _wire(FdrClient(producer_id="c5_state", capacity=16))
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(producer_id="c5_state", frame_id=i))
|
||||
|
||||
# Act
|
||||
client.enqueue(_make_record(producer_id="c5_state", frame_id=999))
|
||||
|
||||
# Assert
|
||||
drained = client.drain(max_records=64)
|
||||
overruns = [r for r in drained if r.kind == OVERRUN_KIND]
|
||||
assert overruns
|
||||
for r in overruns:
|
||||
assert r.producer_id == OVERRUN_PRODUCER_ID # outer envelope
|
||||
assert r.payload["producer_id"] == "c5_state" # originating slug
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-4: composition root wires overrun policy on every client.
|
||||
|
||||
|
||||
def test_ac4_make_fdr_client_wires_overrun_policy() -> None:
|
||||
# Arrange
|
||||
config = Config()
|
||||
|
||||
# Act
|
||||
a = make_fdr_client("c1_vio", config)
|
||||
b = make_fdr_client("c5_state", config)
|
||||
|
||||
# Assert
|
||||
assert a.on_overrun is not None
|
||||
assert b.on_overrun is not None
|
||||
cache = _cached_clients()
|
||||
assert all(c.on_overrun is not None for c in cache.values())
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-6: rate-limited ERROR log under sustained overruns (≤ 1/sec).
|
||||
|
||||
|
||||
def test_ac6_no_log_flood_under_sustained_overruns(
|
||||
caplog: pytest.LogCaptureFixture,
|
||||
) -> None:
|
||||
# Arrange — capacity 16 client; pre-fill, then force retry-after-drop failures
|
||||
# by neutralising the buffer push so the retry path always fails.
|
||||
client = _wire(FdrClient(producer_id="c1_vio", capacity=16))
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
|
||||
# Monkey-patch the buffer's push to always return False (simulates a
|
||||
# frozen consumer mid-policy as per AZ-274 AC-5 contrived scenario).
|
||||
real_push = client._buffer.push
|
||||
client._buffer.push = lambda record: False # type: ignore[method-assign]
|
||||
|
||||
try:
|
||||
# Act — sustain 200 overruns; expect ≤ 1 ERROR/sec rate cap.
|
||||
start = time.monotonic()
|
||||
with caplog.at_level(logging.ERROR, logger="shared.fdr_client.overrun"):
|
||||
for i in range(200):
|
||||
client.enqueue(_make_record(frame_id=1000 + i))
|
||||
elapsed = time.monotonic() - start
|
||||
|
||||
# Assert — rate cap is 1/sec; over a sub-second burst, expect at most
|
||||
# ceil(elapsed) + 1 ERROR records related to overruns.
|
||||
overrun_errors = [
|
||||
r
|
||||
for r in caplog.records
|
||||
if r.kind == "fdr.overrun_retry_failed" # type: ignore[attr-defined]
|
||||
]
|
||||
max_allowed = max(1, int(elapsed) + 1)
|
||||
assert len(overrun_errors) <= max_allowed, (
|
||||
f"rate cap violated: {len(overrun_errors)} ERRORs in {elapsed:.3f}s "
|
||||
f"(max allowed {max_allowed})"
|
||||
)
|
||||
finally:
|
||||
client._buffer.push = real_push # type: ignore[method-assign]
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Reliability invariant: closure exceptions are swallowed; producer hot path stays clean.
|
||||
|
||||
|
||||
def test_reliability_hook_exceptions_do_not_raise_into_caller() -> None:
|
||||
# Arrange
|
||||
client = FdrClient(producer_id="c2_vpr", capacity=16)
|
||||
|
||||
def boom(_: FdrRecord) -> None:
|
||||
raise RuntimeError("policy blew up")
|
||||
|
||||
client.on_overrun = boom
|
||||
for i in range(15):
|
||||
client.enqueue(_make_record(frame_id=i))
|
||||
|
||||
# Act — should not raise
|
||||
result = client.enqueue(_make_record(frame_id=999))
|
||||
|
||||
# Assert
|
||||
assert result == EnqueueResult.OVERRUN
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Capacity-driven config override carries through to per-producer policy.
|
||||
|
||||
|
||||
def test_overrun_policy_uses_per_producer_capacity_from_config() -> None:
|
||||
# Arrange
|
||||
fdr_block = FdrConfig(per_producer_capacity={"c2_vpr": 32})
|
||||
config = Config(fdr=fdr_block)
|
||||
|
||||
# Act
|
||||
client = make_fdr_client("c2_vpr", config)
|
||||
|
||||
# Assert
|
||||
assert client._capacity() == 32
|
||||
assert client.on_overrun is not None
|
||||
@@ -0,0 +1,216 @@
|
||||
"""AZ-275 — FakeFdrSink test double + production isolation guard."""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import ast
|
||||
from pathlib import Path
|
||||
|
||||
import pytest
|
||||
|
||||
from gps_denied_onboard.fdr_client import (
|
||||
EnqueueResult,
|
||||
FdrClient,
|
||||
FdrRecord,
|
||||
)
|
||||
from gps_denied_onboard.fdr_client.fakes import FakeFdrSink
|
||||
from gps_denied_onboard.fdr_client.records import OVERRUN_KIND, OVERRUN_PRODUCER_ID
|
||||
|
||||
_REPO_ROOT = Path(__file__).resolve().parents[2]
|
||||
_SRC_ROOT = _REPO_ROOT / "src" / "gps_denied_onboard"
|
||||
|
||||
|
||||
def _make_record(producer_id: str = "test.producer", frame_id: int = 0) -> FdrRecord:
|
||||
return FdrRecord(
|
||||
schema_version=1,
|
||||
ts="2026-05-11T00:00:00.000000Z",
|
||||
producer_id=producer_id,
|
||||
kind="log",
|
||||
payload={
|
||||
"level": "INFO",
|
||||
"component": producer_id,
|
||||
"frame_id": frame_id,
|
||||
"kind": "test.tick",
|
||||
"msg": "hello",
|
||||
"kv": {},
|
||||
"exc": None,
|
||||
},
|
||||
)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-1: drop-in for FdrClient public surface.
|
||||
|
||||
|
||||
def test_ac1_drop_in_for_fdr_client_public_surface() -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c1_vio")
|
||||
record = _make_record(producer_id="c1_vio")
|
||||
|
||||
# Act
|
||||
result = sink.enqueue(record)
|
||||
popped = sink.pop_one()
|
||||
|
||||
# Assert
|
||||
assert result == EnqueueResult.OK
|
||||
assert popped is record
|
||||
assert sink.producer_id == "c1_vio"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-2: records reflects in-buffer state in FIFO order.
|
||||
|
||||
|
||||
def test_ac2_records_reflects_in_buffer_state_fifo() -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="test")
|
||||
records = [_make_record(frame_id=i) for i in range(3)]
|
||||
|
||||
# Act
|
||||
for r in records:
|
||||
sink.enqueue(r)
|
||||
sink.pop_one()
|
||||
|
||||
# Assert
|
||||
assert sink.records == records[1:]
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-3: all_records_ever captures dropped records too.
|
||||
|
||||
|
||||
def test_ac3_all_records_ever_captures_dropped() -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="test", capacity=2, with_default_overrun_policy=True)
|
||||
a = _make_record(frame_id=0)
|
||||
b = _make_record(frame_id=1)
|
||||
c = _make_record(frame_id=2)
|
||||
|
||||
# Act
|
||||
sink.enqueue(a)
|
||||
sink.enqueue(b)
|
||||
sink.enqueue(c)
|
||||
|
||||
# Assert
|
||||
# Buffer carries the newest 2 (b dropped first, c retried into a's slot)
|
||||
# plus the synthesised overrun record at the burst end.
|
||||
assert any(r.kind == OVERRUN_KIND for r in sink.records)
|
||||
user_records = [r for r in sink.records if r.kind != OVERRUN_KIND]
|
||||
assert c in user_records
|
||||
# all_records_ever includes a (which was dropped by drop-oldest) too.
|
||||
assert a in sink.all_records_ever
|
||||
assert b in sink.all_records_ever
|
||||
assert c in sink.all_records_ever
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-4: overrun policy parity with real FdrClient.
|
||||
|
||||
|
||||
def test_ac4_overrun_policy_parity_with_real_client() -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c1_vio", capacity=4, with_default_overrun_policy=True)
|
||||
# Fill (capacity 4 holds 4 records before overrun starts).
|
||||
for i in range(4):
|
||||
sink.enqueue(_make_record(frame_id=i))
|
||||
|
||||
# Act
|
||||
sink.enqueue(_make_record(frame_id=999))
|
||||
|
||||
# Assert
|
||||
overruns = [r for r in sink.records if r.kind == OVERRUN_KIND]
|
||||
assert overruns, "fake must emit an overrun record when policy is wired"
|
||||
assert overruns[0].producer_id == OVERRUN_PRODUCER_ID
|
||||
assert overruns[0].payload["producer_id"] == "c1_vio"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-5: pytest fixture available.
|
||||
|
||||
|
||||
def test_ac5_fixture_provides_clean_sink_per_test(fake_fdr_sink: FakeFdrSink) -> None:
|
||||
# Arrange / Act / Assert
|
||||
assert isinstance(fake_fdr_sink, FakeFdrSink)
|
||||
assert fake_fdr_sink.records == []
|
||||
fake_fdr_sink.enqueue(_make_record())
|
||||
assert len(fake_fdr_sink.records) == 1
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# AC-6: producer_id preserved on round-trip.
|
||||
|
||||
|
||||
def test_ac6_producer_id_preserved_on_roundtrip() -> None:
|
||||
# Arrange
|
||||
sink = FakeFdrSink(producer_id="c2_vpr")
|
||||
record = _make_record(producer_id="c2_vpr")
|
||||
|
||||
# Act
|
||||
sink.enqueue(record)
|
||||
popped = sink.pop_one()
|
||||
|
||||
# Assert
|
||||
assert popped is not None
|
||||
assert popped.producer_id == "c2_vpr"
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Empty producer_id rejected (parity with real client).
|
||||
|
||||
|
||||
def test_empty_producer_id_raises_value_error() -> None:
|
||||
# Arrange / Act / Assert
|
||||
with pytest.raises(ValueError, match="producer_id"):
|
||||
FakeFdrSink(producer_id="")
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Production isolation: no `src/gps_denied_onboard/**.py` imports the fakes.
|
||||
|
||||
|
||||
def test_production_does_not_import_fakes() -> None:
|
||||
# Arrange
|
||||
violations: list[str] = []
|
||||
target_module_prefix = "gps_denied_onboard.fdr_client.fakes"
|
||||
|
||||
# Act
|
||||
for path in _SRC_ROOT.rglob("*.py"):
|
||||
if path.name == "fakes.py":
|
||||
continue # the module itself
|
||||
try:
|
||||
tree = ast.parse(path.read_text(encoding="utf-8"))
|
||||
except SyntaxError:
|
||||
continue
|
||||
for node in ast.walk(tree):
|
||||
if isinstance(node, ast.ImportFrom) and node.module:
|
||||
if node.module.startswith(target_module_prefix):
|
||||
violations.append(str(path.relative_to(_REPO_ROOT)))
|
||||
elif isinstance(node, ast.Import):
|
||||
for alias in node.names:
|
||||
if alias.name.startswith(target_module_prefix):
|
||||
violations.append(str(path.relative_to(_REPO_ROOT)))
|
||||
|
||||
# Assert
|
||||
assert not violations, (
|
||||
"Production code must not import gps_denied_onboard.fdr_client.fakes. "
|
||||
f"Violations: {violations}"
|
||||
)
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Contract parity: every public method on FdrClient also exists on FakeFdrSink.
|
||||
|
||||
|
||||
def test_contract_parity_public_methods() -> None:
|
||||
# Arrange
|
||||
public_attrs = {
|
||||
name
|
||||
for name in dir(FdrClient)
|
||||
if not name.startswith("_") and callable(getattr(FdrClient, name))
|
||||
}
|
||||
public_attrs |= {"producer_id", "on_overrun"} # property pair
|
||||
|
||||
# Act
|
||||
missing = [name for name in public_attrs if not hasattr(FakeFdrSink, name)]
|
||||
|
||||
# Assert
|
||||
assert not missing, f"FakeFdrSink missing public surface: {missing}"
|
||||
Reference in New Issue
Block a user