Backport create_status from v1.0.0

sigmavirus24 · sigmavirus24 · commit 8077d11ed861 · 2016-02-15T17:13:41.000-06:00
This fixes a ValidationError caused by defaults in the method

:muscle: :computer: :us:
diff --git a/github3/repos/repo.py b/github3/repos/repo.py
@@ -786,20 +786,26 @@ def create_release(self, tag_name, target_commitish=None, name=None,
         return Release(json, self)
 
     @requires_auth
-    def create_status(self, sha, state, target_url='', description='', context=''):
+    def create_status(self, sha, state, target_url=None, description=None,
+                      context='default'):
         """Create a status object on a commit.
 
         :param str sha: (required), SHA of the commit to create the status on
         :param str state: (required), state of the test; only the following
             are accepted: 'pending', 'success', 'error', 'failure'
         :param str target_url: (optional), URL to associate with this status.
         :param str description: (optional), short description of the status
+        :param str context: (optional), A string label to differentiate this
+            status from the status of other systems
+        :returns: the status created if successful
+        :rtype: :class:`~github3.repos.status.Status`
         """
-        json = {}
+        json = None
         if sha and state:
             data = {'state': state, 'target_url': target_url,
                     'description': description, 'context': context}
             url = self._build_url('statuses', sha, base_url=self._api)
+            self._remove_none(data)
             json = self._json(self._post(url, data=data), 201)
         return Status(json) if json else None
 
