's'

d2ypp2/tests/test_hdmi_control.py

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+from __future__ import annotations
+
+import unittest
+
+from src.hdmi_control import _parse_v4l2_devices, _recommend_capture_device
+
+
+class HdmiControlTests(unittest.TestCase):
+    def test_parse_v4l2_devices_extracts_nodes(self) -> None:
+        text = (
+            "USB Video:\n"
+            "\t/dev/video0\n"
+            "\t/dev/video1\n"
+            "\n"
+            "bcm2835-codec:\n"
+            "\t/dev/video10\n"
+        )
+        items = _parse_v4l2_devices(text)
+        self.assertEqual(items[0]["name"], "USB Video")
+        self.assertEqual(items[0]["nodes"], ["/dev/video0", "/dev/video1"])
+        self.assertTrue(items[0]["is_capture_candidate"])
+
+    def test_parse_v4l2_devices_handles_empty(self) -> None:
+        self.assertEqual(_parse_v4l2_devices(""), [])
+
+    def test_recommend_capture_device_skips_codec_only_nodes(self) -> None:
+        text = (
+            "bcm2835-codec:\n"
+            "\t/dev/video10\n"
+            "\n"
+            "USB Video:\n"
+            "\t/dev/video0\n"
+        )
+        items = _parse_v4l2_devices(text)
+        self.assertFalse(items[0]["is_capture_candidate"])
+        self.assertEqual(_recommend_capture_device(["/dev/video0", "/dev/video10"], items), "/dev/video0")
+
+
+if __name__ == "__main__":
+    unittest.main()