add unit tests for draft 3 'required' objects

Author: alexmmm

tests/JsonSchema/Tests/Constraints/RequiredPropertyTest.php

@@ -68,6 +68,16 @@ public function getInvalidTests()
                 '{
                     "required": ["foo"]
                 }'
+            ),
+            array(
+                '{
+                }',
+                '{
+                    "type": "object",
+                    "properties": {
+                        "foo": { "required": true }
+                    }
+                }'
             )
         );
     }
@@ -179,6 +189,17 @@ public function getValidTests()
                     },
                     "required": ["foo"]
                 }'
+            ),
+            array(
+                '{
+                    "foo": {}
+                }',
+                '{
+                    "type": "object",
+                    "properties": {
+                        "foo": { "required": true }
+                    }
+                }'
             )
         );
     }