test: [WordFE] test call to model.transcribe()

test/test_feature_extractors.py

@@ -451,3 +451,13 @@ class TestWordFeatureExtractor(unittest.TestCase):
         test_extractor.teardown()
 
         self.assertEqual(len(test_extractor.features), 3)
+
+    def test_transcribe(self):
+        """Test _transcribe -- it calls model.transcribe"""
+        video_source = TestSourceMedia().one_colour_silent_audio()
+        test_extractor = extractors.WordFeatureExtractor(input_files=video_source)
+        mock_model = MagicMock()
+        test_extractor._transcribe(mock_model, "test.mp4")
+        mock_model.transcribe.assert_called_once()
+
+