Added UT to test_tagger

tests/test_tagger.py

@@ -10,6 +10,7 @@
 class TestTagger(unittest.TestCase):
     def setUp(self):
         self.t = Tagger()
+        self.tags_list = ['foo','bar', 'foobar']
 
     @mock.patch("musicbrainzngs.search_artists")
     def test_get_tags_from_musicbrainzgs__match(self, search_artist_patch):
@@ -26,6 +27,34 @@ def test_get_tags_from_musicbrainzgs__empty(self, search_artist_patch):
         result = self.t.get_tags_from_musicbrainzgs('foo')
         self.assertListEqual([], result)
 
+    def test_filter_tags_with_whitelist(self):
+        self.t.whitelist = ['foo']
+        result = self.t.filter_tags_with_whitelist(self.tags_list)
+        self.assertListEqual(['foo'], result)
+
+    def test_filter_tags_with_blacklist(self):
+        self.t.blacklist = ['bar']
+        result = self.t.filter_tags_with_blacklist(self.tags_list)
+        self.assertListEqual(['foo', 'foobar'], result)
+
+    def test_filter_tags__whitelist(self):
+        self.t.whitelist = ['foo']
+        self.t.blacklist = None
+        result = self.t.filter_tags(self.tags_list)
+        self.assertListEqual(['foo'], result)
+
+    def test_filter_tags__blacklist(self):
+        self.t.whitelist = None
+        self.t.blacklist = ['bar']
+        result = self.t.filter_tags(self.tags_list)
+        self.assertListEqual(['foo', 'foobar'], result)
+
+    def test_filter_tags__all(self):
+        self.t.whitelist = ['foo', 'foobar']
+        self.t.blacklist = ['foo']
+        result = self.t.filter_tags(self.tags_list)
+        self.assertListEqual(['foobar'], result)
+
 
 if __name__ == '__main__':
     unittest.main()