Handling responses with 204 status code

pypermedia/siren.py

@@ -32,6 +32,9 @@ def _check_and_decode_response(response):
     if response.status_code > 299 or response.status_code < 200:
         raise UnexpectedStatusError(message='Received an unexpected status code of "{0}"! Unable to construct siren objects.'.format(response.status_code))
 
+    if response.status_code == 204:
+        return None
+
     response = response.text
     if not response:
         raise MalformedSirenError(message='Parameter "response" object had empty response content. Unable to construct siren objects.')

tests/unit/test_siren.py

@@ -40,6 +40,17 @@ def test_check_and_decode_empty_text(self):
         resp = mock.Mock(status_code=200, text='')
         self.assertRaises(MalformedSirenError, _check_and_decode_response, resp)
 
+    def test_check_and_decode_no_content(self):
+        """
+        Tests that no entity is created when
+        status code is 204.
+        """
+        resp = mock.Mock(status_code=204, text=None)
+        assert _check_and_decode_response(resp) is None
+
+        resp = mock.Mock(status_code=204, text='')
+        assert _check_and_decode_response(resp) is None
+
     def test_construct_link(self):
         builder = SirenBuilder()
         link = builder._construct_link(dict(rel=['rel'], href='whocares'))