def test_invalid_type_returns_none(self):
    self.mock_response('image/watercolour')
    artpath = self.plugin._fetch_image('http://example.com')
    self.assertEqual(artpath, None)
def test_invalid_type_returns_none(self):
    self.mock_response('image/watercolour')
    artpath = self.plugin._fetch_image('http://example.com')
    self.assertEqual(artpath, None)