-def check_load(xml_file):
-    pi = dcparser.parse(xml_file, picture.PictureInfo)
-    assert pi is not None
-    assert isinstance(pi, picture.PictureInfo)
+class PictureTests(unittest.TestCase):
+    def test_wlpictureuri(self):
+        uri = picture.WLPictureURI('http://wolnelektury.pl/katalog/obraz/angelus-novus')
+
+    def check_load(self, xml_file):
+        pi = dcparser.parse(xml_file, picture.PictureInfo)
+        self.assertIsNotNone(pi)
+        self.assertIsInstance(pi, picture.PictureInfo)