Add tests for serialize.py

This includes tests for serialize_recording and
serialize_artist_credits.

brainzutils/musicbrainz_db/tests/test_serialize.py

@@ -0,0 +1,56 @@
+from brainzutils.musicbrainz_db.serialize import serialize_recording, serialize_artist_credit
+from brainzutils.musicbrainz_db.test_data import recording_numb_encore_explicit, artistcredit_jay_z_linkin_park
+from unittest import TestCase
+
+class SerializeTestCase(TestCase):
+    def test_serialize_recording(self):
+        """Tests that recordings are serialized properly."""
+        # Without any includes
+        recording = serialize_recording(recording_numb_encore_explicit)
+        self.assertDictEqual(recording,
+            {
+                'length': 205.28,
+                'id': 'daccb724-8023-432a-854c-e0accb6c8678',
+                'name': 'Numb/Encore (explicit)',
+            }
+        )
+
+        # With artists included
+        recording = serialize_recording(recording_numb_encore_explicit, includes={'artists'})
+        self.assertDictEqual(recording,
+            {
+                'id': 'daccb724-8023-432a-854c-e0accb6c8678',
+                'name': 'Numb/Encore (explicit)',
+                'length': 205.28,
+                'artists':[
+                    {
+                        'id': 'f82bcf78-5b69-4622-a5ef-73800768d9ac',
+                        'name': 'JAY Z',
+                        'credited_name': 'Jay-Z',
+                        'join_phrase': '/'
+                    },
+                    {
+                        'id': 'f59c5520-5f46-4d2c-b2c4-822eabf53419',
+                        'name': 'Linkin Park'
+                    }
+                ]
+            }
+        )
+
+    def test_serialize_artist_credits(self):
+        """Test that artist_credits are serialized properly."""
+        artist_credits = serialize_artist_credit(artistcredit_jay_z_linkin_park)
+        self.assertListEqual(artist_credits,
+            [
+                {
+                    'id': 'f82bcf78-5b69-4622-a5ef-73800768d9ac',
+                    'name': 'JAY Z',
+                    'credited_name': 'Jay-Z',
+                    'join_phrase': '/'
+                },
+                {
+                    'id': 'f59c5520-5f46-4d2c-b2c4-822eabf53419',
+                    'name': 'Linkin Park'
+                }
+            ]
+        )