test: Add mocked test calls to TestLFE

test/test_feature_extractors.py

@@ -20,6 +20,42 @@ class TestSourceMedia():
         return SourceMedia(sources=[TestSource().one_colour_silent_audio()])
 
 class TestLaughterFeatureExtractor(unittest.TestCase):
+    def _mock_laughdetect_callout(self, *args, **kwargs):
+        """Mock _laughdetect callout
+
+        **kwargs:
+          - n : int >=0, number of laughter instances to generate
+        Return a list of 2-tuple floats (start, end) representing laughter instances
+        """
+        laughs = []
+        n = kwargs.get("n", 0)
+        for i in range(n):
+            laughs.append((i, i+1))
+
+        return laughs
+
+    def _mock_run_get_output(self, *args, **kwargs) -> str:
+        """Mock run_get_output callout
+
+        kwargs:
+          - n : int >=0, number of laughter instances to generate
+
+        Return a string of laughter instance of the form:
+        instance: (1.234, 5.678)
+        """
+        # TODO: decide if we want non-"instance" output for testing parsing?
+        # (maybe)
+        output = []
+        n = kwargs.get("n", 0)
+        for i in range(n):
+            output.append(f"instance: ({i}.{i+1}{i+2}{i+3}, {i+4}.{i+5}{i+6}{i+7})")
+        return "\n".join(output)
+
+    def _sgo5(self, *args, **kwargs):
+        """Mock run_get_output callout"""
+        return self._mock_run_get_output(*args, **kwargs, n=5)
+
+
     """Test LaughterFeatureExtractor"""
     def test_init(self):
         test_extractor = extractors.LaughterFeatureExtractor()
@@ -32,6 +68,48 @@ class TestLaughterFeatureExtractor(unittest.TestCase):
             test_extractor.setup()
         # NB test WITH sources implicitly tested in test_extract
 
+    @pytest.mark.slow
+    def test_extract_mocked_nolaughs(self):
+        """Test extract with mocked laughter detection - no laughs"""
+        video_source = TestSource().one_colour_silent_audio()
+        test_extractor = extractors.LaughterFeatureExtractor(input_files=[video_source])
+        test_extractor._laughdetect = self._mock_laughdetect_callout
+        test_extractor.setup()
+        test_extractor.run()
+        test_extractor.teardown()
+        self.assertEqual(len(test_extractor.features), 0)
+
+    def test_extract_mocked_run_get_output_none(self):
+        """Test extract with mocked laughter detection - no laughs"""
+        video_source = TestSource().one_colour_silent_audio()
+        test_extractor = extractors.LaughterFeatureExtractor(input_files=[video_source])
+        test_extractor._run_get_output = self._mock_run_get_output
+        test_extractor.setup()
+        test_extractor.run()
+        test_extractor.teardown()
+        self.assertEqual(len(test_extractor.features), 0)
+
+    def test_extract_mocked_run_get_output_5(self):
+        """Test extract with mocked laughter detection - 5 laughs"""
+        video_source = TestSource().one_colour_silent_audio()
+        test_extractor = extractors.LaughterFeatureExtractor(input_files=[video_source])
+        test_extractor._run_get_output = self._sgo5
+        test_extractor.setup()
+        test_extractor.run()
+        test_extractor.teardown()
+        self.assertEqual(len(test_extractor.features), 5)
+
+    def test_run_get_output(self):
+        """Test run_get_output"""
+        video_source = TestSource().one_colour_silent_audio()
+        test_extractor = extractors.LaughterFeatureExtractor(input_files=[video_source])
+        test_cmd = ["echo", "foo"]
+        test_extractor.setup()
+        output = test_extractor._run_get_output(test_cmd)
+        self.assertEqual(output, "foo\n")
+
+    # TODO: add sample video with laughs to test _laughdetect()
+
 class TestRandomFeatureExtractor(unittest.TestCase):
     """Test RandomFeatureExtractor"""
     def test_init(self):