Add unit test

tests/test_colorspace.py

@@ -0,0 +1,20 @@
+from av.video.reformatter import ColorRange, Colorspace
+import av
+
+from .common import TestCase, fate_suite
+
+
+class TestColorSpace(TestCase):
+    def test_color_range(self):
+        container = av.open(
+            fate_suite("amv/MTV_high_res_320x240_sample_Penguin_Joke_MTV_from_WMV.amv")
+        )
+        stream = container.streams.video[0]
+
+        self.assertEqual(stream.color_range, None)
+
+        for packet in container.demux(stream):
+            for frame in packet.decode():
+                self.assertEqual(frame.color_range, ColorRange.JPEG)  # a.k.a "pc"
+                self.assertEqual(frame.colorspace, Colorspace.ITU601)
+                return