5444f19d45
build_runtimes() logs-and-skips a camera it cannot open, so a wrong /dev/video index or an unseated ribbon produced a green systemd unit that silently monitored one camera less. - edge/probe.py: opens each camera in CAMERAS, retries while the sensor settles, reports frame geometry, optionally saves preview PNGs, and exits non-zero with a backend-specific hint (v4l2-ctl / rpicam-hello) - setup_online.sh: new step [8/9] runs it against the installed package and the CAMERAS line actually written to edge.env, and refuses to enable the unit on failure. SKIP_CAMERA_CHECK=1 opts out. Tests: 174 pass, 2 skipped (7 new).
78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
"""Camera probe (edge/probe.py) — all with fakes, no hardware."""
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import pytest
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from edge import probe
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class FakeFrame:
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def __init__(self, shape):
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self.shape = shape
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class FakeSource:
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"""Yields `blanks` empty reads, then frames. Records that close() was called."""
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def __init__(self, blanks=0, shape=(480, 640, 3)):
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self._blanks = blanks
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self._shape = shape
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self.closed = False
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def read(self):
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if self._blanks > 0:
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self._blanks -= 1
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return False, None
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return True, FakeFrame(self._shape)
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def close(self):
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self.closed = True
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def test_probe_reports_frame_geometry():
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r = probe.probe_one("uvc", "0", "cam-02", build_source=lambda b, d: FakeSource())
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assert r.ok
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assert "640x480" in r.detail and "3 channel" in r.detail
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def test_probe_retries_while_the_sensor_settles():
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# A UVC camera commonly returns nothing for the first reads; that is not a failure.
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src = FakeSource(blanks=probe._READ_ATTEMPTS - 1)
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r = probe.probe_one("uvc", "0", "cam-02", build_source=lambda b, d: src)
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assert r.ok
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def test_probe_fails_when_no_frame_ever_arrives(monkeypatch):
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monkeypatch.setattr(probe, "_READ_DELAY_S", 0)
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src = FakeSource(blanks=probe._READ_ATTEMPTS)
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r = probe.probe_one("csi", "0", "cam-01", build_source=lambda b, d: src)
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assert not r.ok
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assert "no frame" in r.detail
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def test_probe_fails_when_the_device_cannot_be_opened():
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def boom(backend, device):
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raise RuntimeError("UVC device 0 failed to open")
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r = probe.probe_one("uvc", "0", "cam-02", build_source=boom)
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assert not r.ok
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assert "open failed" in r.detail
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def test_probe_closes_the_source_even_on_failure(monkeypatch):
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monkeypatch.setattr(probe, "_READ_DELAY_S", 0)
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src = FakeSource(blanks=probe._READ_ATTEMPTS)
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probe.probe_one("uvc", "0", "cam-02", build_source=lambda b, d: src)
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assert src.closed, "a probe that holds the device open would block the daemon start"
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def test_probe_all_covers_every_configured_camera():
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env = {"CAMERAS": "csi:0:cam-01,uvc:0:cam-02"}
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results = probe.probe_all(env, build_source=lambda b, d: FakeSource())
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assert [r.camera_id for r in results] == ["cam-01", "cam-02"]
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assert [r.backend for r in results] == ["csi", "uvc"]
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assert all(r.ok for r in results)
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def test_probe_all_rejects_a_malformed_cameras_value():
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with pytest.raises(ValueError):
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probe.probe_all({"CAMERAS": "csi:0"}, build_source=lambda b, d: FakeSource())
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