Refactor REST API tests to use explicit reactors (#3351)

tests/unittest.py

@@ -109,6 +109,17 @@ class TestCase(unittest.TestCase):
             except AssertionError as e:
                 raise (type(e))(e.message + " for '.%s'" % key)
 
+    def assert_dict(self, required, actual):
+        """Does a partial assert of a dict.
+
+        Args:
+            required (dict): The keys and value which MUST be in 'actual'.
+            actual (dict): The test result. Extra keys will not be checked.
+        """
+        for key in required:
+            self.assertEquals(required[key], actual[key],
+                              msg="%s mismatch. %s" % (key, actual))
+
 
 def DEBUG(target):
     """A decorator to set the .loglevel attribute to logging.DEBUG.