Added unit tests to cover protocol.album_art

tests/protocol/test_albumart.py

@@ -0,0 +1,53 @@
+from io import BytesIO
+from mopidy_mpd.protocol import album_art
+from unittest import mock
+from mopidy.models import Album, Track, Image
+
+from tests import protocol
+
+
+def mock_get_images(self, uris):
+    result = {}
+    for uri in uris:
+        result[uri] = [Image(uri="dummy:/albumart.jpg", width=128, height=128)]
+    return result
+
+
+class AlbumArtTest(protocol.BaseTestCase):
+    def test_albumart_for_track_without_art(self):
+        track = Track(
+            uri="dummy:/à",
+            name="a nàme",
+            album=Album(uri="something:àlbum:12345"),
+        )
+        self.backend.library.dummy_library = [track]
+        self.core.tracklist.add(uris=[track.uri]).get()
+
+        self.core.playback.play().get()
+
+        self.send_request("albumart /home/test/music.flac 0")
+        self.assertInResponse("binary: 0")
+
+    @mock.patch.object(
+        protocol.core.library.LibraryController, "get_images", mock_get_images
+    )
+    def test_albumart(self):
+        track = Track(
+            uri="dummy:/à",
+            name="a nàme",
+            album=Album(uri="something:àlbum:12345"),
+        )
+        self.backend.library.dummy_library = [track]
+        self.core.tracklist.add(uris=[track.uri]).get()
+
+        self.core.playback.play().get()
+
+        ##
+        expected = b"result"
+
+        with mock.patch.object(
+            album_art, "urlopen", return_value=BytesIO(expected)
+        ):
+            self.send_request("albumart /home/test/music.flac 0")
+
+        self.assertInResponse("binary: " + str(len(expected)))