Add tests for DummyCurrentPlaylistController.get_by_{id,uri}

tests/backends/get_test.py

@@ -0,0 +1,46 @@
+import unittest
+
+from mopidy.backends.dummy import DummyBackend, DummyCurrentPlaylistController
+from mopidy.models import Playlist, Track
+
+class CurrentPlaylistGetTest(unittest.TestCase):
+    def setUp(self):
+        self.b = DummyBackend()
+        self.c = self.b.current_playlist
+
+    def test_get_by_id_returns_unique_match(self):
+        track = Track(id=1)
+        self.c.playlist = Playlist(tracks=[Track(id=13), track, Track(id=17)])
+        self.assertEqual(track, self.c.get_by_id(1))
+
+    def test_get_by_id_returns_first_of_multiple_matches(self):
+        track = Track(id=1)
+        self.c.playlist = Playlist(tracks=[Track(id=13), track, track])
+        self.assertEqual(track, self.c.get_by_id(1))
+
+    def test_get_by_id_raises_keyerror_if_no_match(self):
+        self.c.playlist = Playlist(tracks=[Track(id=13), Track(id=17)])
+        try:
+            self.c.get_by_id(1)
+            self.fail(u'Should raise KeyError if no match')
+        except KeyError:
+            pass
+
+    def test_get_by_uri_returns_unique_match(self):
+        track = Track(uri='a')
+        self.c.playlist = Playlist(
+            tracks=[Track(uri='z'), track, Track(uri='y')])
+        self.assertEqual(track, self.c.get_by_uri('a'))
+
+    def test_get_by_uri_returns_first_of_multiple_matches(self):
+        track = Track(uri='a')
+        self.c.playlist = Playlist(tracks=[Track(uri='z'), track, track])
+        self.assertEqual(track, self.c.get_by_uri('a'))
+
+    def test_get_by_uri_raises_keyerror_if_no_match(self):
+        self.c.playlist = Playlist(tracks=[Track(uri='z'), Track(uri='y')])
+        try:
+            self.c.get_by_uri('a')
+            self.fail(u'Should raise KeyError if no match')
+        except KeyError:
+            pass