[AZ-238] [AZ-239] Add resource restart tests

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/blackbox/test_cold_start_restart.py

@@ -0,0 +1,71 @@
+from pathlib import Path
+
+from e2e.replay.harness import (
+    BlackboxReplayRunner,
+    ScenarioConfig,
+    ScenarioGroup,
+    ScenarioResult,
+    relocalization_required,
+    summarize_cold_start_trials,
+)
+
+
+def test_disconnected_segment_triggers_relocalization_request_check() -> None:
+    # Act / Assert
+    assert relocalization_required(visual_overlap_fraction=0.03, disconnected_duration_s=0.5) is True
+    assert relocalization_required(visual_overlap_fraction=0.5, disconnected_duration_s=4.0) is True
+    assert relocalization_required(visual_overlap_fraction=0.5, disconnected_duration_s=1.0) is False
+
+
+def test_restart_scenario_records_first_output_or_blocked_prerequisite(tmp_path: Path) -> None:
+    # Arrange
+    scenario = ScenarioConfig(
+        scenario_id="NFT-RES-03",
+        name="Companion restart recovery",
+        group=ScenarioGroup.RESILIENCE,
+        input_dataset="restart_trace",
+        required_paths=(tmp_path / "restart-trace.tlog",),
+    )
+
+    # Act
+    result = BlackboxReplayRunner(output_root=tmp_path, scenarios=(scenario,)).run()
+
+    # Assert
+    report = result.reports[0]
+    assert report.result == ScenarioResult.BLOCKED
+    assert "restart-trace.tlog" in report.error_message
+    assert report.artifacts[0].exists()
+
+
+def test_cold_start_trials_report_p95_first_fix_and_resource_spike() -> None:
+    # Arrange
+    first_fix_latencies_s = tuple(20.0 + (index % 5) for index in range(50))
+    peak_memory_bytes = tuple(2_500_000_000 + index * 1_000_000 for index in range(50))
+
+    # Act
+    summary = summarize_cold_start_trials(first_fix_latencies_s, peak_memory_bytes)
+
+    # Assert
+    assert summary["trial_count"] == 50.0
+    assert summary["p95_first_fix_s"] < 30.0
+    assert summary["first_fix_passed"] is True
+    assert summary["memory_passed"] is True
+
+
+def test_cold_start_hardware_prerequisites_are_blocked_not_passed(tmp_path: Path) -> None:
+    # Arrange
+    scenario = ScenarioConfig(
+        scenario_id="NFT-RES-LIM-05",
+        name="Cold-start resource spike",
+        group=ScenarioGroup.RESOURCE_LIMIT,
+        input_dataset="jetson_resource_monitor",
+        required_services=("jetson",),
+    )
+
+    # Act
+    result = BlackboxReplayRunner(output_root=tmp_path, scenarios=(scenario,)).run()
+
+    # Assert
+    report = result.reports[0]
+    assert report.result == ScenarioResult.BLOCKED
+    assert "Jetson prerequisite blocked" in report.error_message