test: [LoudFE._keep_min] test min duration

test/test_feature_extractors.py

@@ -252,6 +252,19 @@ class TestLoudAudioFeatureExtractor(unittest.TestCase):
             test_extractor.teardown()
             self.assertEqual(len(test_extractor.features), 10)
 
+        # test with min_duration
+        min_duration = 100
+        with self.subTest("min_duration"):
+            test_extractor = extractors.LoudAudioFeatureExtractor(input_files=video_source,
+                                                                  min_duration=min_duration,
+                                                                  num_features=10)
+            test_extractor._get_loudnesses = self._mock_get_loudnessess
+            test_extractor.setup()
+            test_extractor.run()
+            test_extractor.teardown()
+            for feature in test_extractor.features:
+                self.assertGreaterEqual(feature.interval.duration, min_duration)
+
     # TODO: add sample video with loud audio to test _loudnessdetect()
 
 class TestVideoActivityFeatureExtractor(unittest.TestCase):