test: add MockSource & MockInterval to test Feature

test/test_utils.py

@@ -3,6 +3,28 @@ import unittest
 
 import pipeline.utils as utils
 
+class MockSource():
+    """Mock Source object for testing Feature"""
+    def __init__(self, source):
+        self.source = source
+
+    def __str__(self):
+        return self.source
+
+    def to_json(self):
+        return {"source": self.source}
+
+    def __eq__(self, other):
+        return self.source == other.source
+
+class MockInterval():
+    """Mock Interval object for testing Feature"""
+    def __init__(self, start, end):
+        self.start = start
+        self.end = end
+
+    def to_json(self):
+        return {"start": self.start, "end": self.end}
 
 class TestSource(unittest.TestCase):
     """Source is a container for source, path, and provider of a media file