[xtube] Fix test case

test/helper.py

@@ -113,6 +113,16 @@ def expect_info_dict(self, got_dict, expected_dict):
             self.assertTrue(
                 got.startswith(start_str),
                 'field %s (value: %r) should start with %r' % (info_field, got, start_str))
+        elif isinstance(expected, compat_str) and expected.startswith('contains:'):
+            got = got_dict.get(info_field)
+            contains_str = expected[len('contains:'):]
+            self.assertTrue(
+                isinstance(got, compat_str),
+                'Expected a %s object, but got %s for field %s' % (
+                    compat_str.__name__, type(got).__name__, info_field))
+            self.assertTrue(
+                contains_str in got,
+                'field %s (value: %r) should contain %r' % (info_field, got, contains_str))
         elif isinstance(expected, type):
             got = got_dict.get(info_field)
             self.assertTrue(isinstance(got, expected),

youtube_dl/extractor/xtube.py

@@ -22,7 +22,7 @@ class XTubeIE(InfoExtractor):
             'id': 'kVTUy_G222_',
             'ext': 'mp4',
             'title': 'strange erotica',
-            'description': 'http://www.xtube.com an ET kind of thing',
+            'description': 'contains:an ET kind of thing',
             'uploader': 'greenshowers',
             'duration': 450,
             'age_limit': 18,