Add tests for recordings retention and fix bug (#7183)

* Add tests for segment info

* Fix logic

frigate/test/test_record_retention.py

@@ -0,0 +1,33 @@
+import unittest
+
+from frigate.config import RetainModeEnum
+from frigate.record.maintainer import SegmentInfo
+
+
+class TestRecordRetention(unittest.TestCase):
+    def test_motion_should_keep_motion_not_object(self):
+        segment_info = SegmentInfo(
+            motion_box_count=1, active_object_count=0, average_dBFS=0
+        )
+        assert not segment_info.should_discard_segment(RetainModeEnum.motion)
+        assert segment_info.should_discard_segment(RetainModeEnum.active_objects)
+
+    def test_object_should_keep_object_not_motion(self):
+        segment_info = SegmentInfo(
+            motion_box_count=0, active_object_count=1, average_dBFS=0
+        )
+        assert segment_info.should_discard_segment(RetainModeEnum.motion)
+        assert not segment_info.should_discard_segment(RetainModeEnum.active_objects)
+
+    def test_all_should_keep_all(self):
+        segment_info = SegmentInfo(
+            motion_box_count=0, active_object_count=0, average_dBFS=0
+        )
+        assert not segment_info.should_discard_segment(RetainModeEnum.all)
+
+    def test_should_keep_audio_in_motion_mode(self):
+        segment_info = SegmentInfo(
+            motion_box_count=0, active_object_count=0, average_dBFS=1
+        )
+        assert not segment_info.should_discard_segment(RetainModeEnum.motion)
+        assert segment_info.should_discard_segment(RetainModeEnum.active_objects)