React.js组件实例道具不能通过Jest模拟？

Question

我想知道为什么我的模拟似乎没有覆盖Component的onclick方法。实际上它确实如此，除非我模拟点击。

/** @jsx React.DOM */
//tests/app/modules/autocompletesearchinput-test.js
jest.dontMock('../../../app/modules/AutocompleteSearchInput.jsx');

var React, TestUtils, FluxxorTestUtils, FluxConstructor, realFlux, fakeFlux, MyComponent, Component;

describe('Testing Autocomplete Search Input', function() {

    beforeEach(function() {
        React = require('react/addons');
        TestUtils = React.addons.TestUtils;
        FluxxorTestUtils = require('fluxxor-test-utils');
        FluxConstructor = require('../../../app/FluxConstructor.js');
        realFlux = FluxConstructor();
        fakeFlux = FluxxorTestUtils.fakeFlux(realFlux);
        fakeFlux.genMocksForStoresAndActions();
        // now all store and action methods are mocked for testing

        MyComponent = require('../../../app/modules/AutocompleteSearchInput.jsx');
        Component = TestUtils.renderIntoDocument(<MyComponent flux={fakeFlux} />);

    });
    it('when created, component should have AutocompleteSearchInput class', function() {
        var div = TestUtils.findRenderedDOMComponentWithClass(
            Component, 'AutocompleteSearchInput');
    });
    it('when mounted and clicked, should call searchBtnClick', function() {

        Component.searchBtnClick = jest.genMockFunction();
        TestUtils.Simulate.click(Component.refs.searchButton.getDOMNode());
        Component.searchBtnClick();
        expect(Component.searchBtnClick).toBeCalled();
    });
});

作为参考，我一直在使用它：Test a React Component function with Jest