Add failing tests.

not defined props must be removed instead of setting them undefined

Author: istarkov

test/components/connect.spec.js

@@ -270,53 +270,6 @@ describe('React', () => {
       expect('x' in propsAfter).toEqual(false, 'x prop must be removed');
     });
 
-    it('should remove undefined props without mapDispatchToProps', () => {
-      // in this failing test connect doesn't call render second time
-      // i can't understand why
-      const store = createStore(() => ({}));
-      let props = { x: true };
-      let container;
-
-      @connect(() => ({}))
-      class ConnectContainer extends Component {
-        render() {
-          return (
-              <div {...this.props} />
-          );
-        }
-      }
-
-      class HolderContainer extends Component {
-        render() {
-          return (
-            <ConnectContainer {...props} />
-          );
-        }
-      }
-
-      TestUtils.renderIntoDocument(
-        <Provider store={store}>
-          {() => (
-            <HolderContainer ref={instance => container = instance} />
-          )}
-        </Provider>
-      );
-
-      const propsBefore = {
-        ...TestUtils.findRenderedDOMComponentWithTag(container, 'div').props
-      };
-
-      props = {};
-      container.forceUpdate();
-
-      const propsAfter = {
-        ...TestUtils.findRenderedDOMComponentWithTag(container, 'div').props
-      };
-
-      expect(propsBefore.x).toEqual(true);
-      expect(propsAfter.x).toNotEqual(true);
-    });
-
     it('should ignore deep mutations in props', () => {
       const store = createStore(() => ({
         foo: 'bar'