test(e2e): add VPAIRAdapter (pose-only; fixed-wing capability)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/e2e/test_vpair_adapter.py

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+"""VPAIRAdapter unit tests with a fabricated vpair_sample/ layout."""
+
+from pathlib import Path
+
+import pytest
+
+from gps_denied.testing.datasets.base import (
+    DatasetNotAvailableError,
+    PlatformClass,
+)
+from gps_denied.testing.datasets.vpair import VPAIRAdapter
+
+
+@pytest.fixture
+def fake_vpair_root(tmp_path: Path) -> Path:
+    (tmp_path / "queries").mkdir()
+    for fn in ("q_00000.jpg", "q_00001.jpg"):
+        (tmp_path / "queries" / fn).write_bytes(b"\xff\xd8\xff\xd9")  # minimal JPEG
+    (tmp_path / "poses.csv").write_text(
+        "filename,lat,lon,alt,qx,qy,qz,qw,timestamp_ns\n"
+        "q_00000.jpg,50.737,7.095,350.0,0,0,0,1,0\n"
+        "q_00001.jpg,50.7372,7.0952,350.0,0,0,0,1,1000000000\n"
+    )
+    return tmp_path
+
+
+def test_raises_when_missing(tmp_path: Path):
+    with pytest.raises(DatasetNotAvailableError):
+        VPAIRAdapter(tmp_path / "nope")
+
+
+def test_capabilities_no_raw_imu(fake_vpair_root: Path):
+    adapter = VPAIRAdapter(fake_vpair_root)
+    cap = adapter.capabilities
+    assert cap.has_raw_imu is False
+    assert cap.platform_class == PlatformClass.FIXED_WING
+
+
+def test_iter_frames(fake_vpair_root: Path):
+    adapter = VPAIRAdapter(fake_vpair_root)
+    frames = list(adapter.iter_frames())
+    assert len(frames) == 2
+    assert Path(frames[0].image_path).name == "q_00000.jpg"
+    assert frames[1].timestamp_ns == 1_000_000_000
+
+
+def test_iter_imu_empty(fake_vpair_root: Path):
+    adapter = VPAIRAdapter(fake_vpair_root)
+    assert list(adapter.iter_imu()) == []
+
+
+def test_iter_ground_truth(fake_vpair_root: Path):
+    adapter = VPAIRAdapter(fake_vpair_root)
+    gt = list(adapter.iter_ground_truth())
+    assert len(gt) == 2
+    assert gt[0].lat == pytest.approx(50.737)
+    assert gt[0].alt == pytest.approx(350.0)