当console.log变量时，target.dispatchEvent上的TypeError

Question

我正在尝试对我的react组件进行测试，但是当我console.log(nav)

时出现此错误

错误：

Chrome 44.0.2403 (Mac OS X 10.10.4) App has nav FAILED
    Error: the error "TypeError: target.dispatchEvent is not a function" was thrown, throw an Error :)

代码：

import React from 'react/addons';
var TestUtils = React.addons.TestUtils;
import testHelper from '../../test/helpers/testHelper.js';
import App from '../../app/views/app.js';
var app = testHelper.getRouterComponent(App);

describe('App', function() {
    it('has nav', function(done) {
        var nav = TestUtils.findRenderedDOMComponentWithTag(app, 'nav');
        console.log(nav);
        expect(nav).to.exist;
        done();
    });
});

不太确定如何调试此问题或为何发生这种情况。当我删除console.log(nav)时，错误没有出现。

Answer 1

而不是console.log尝试：

console.log(require('util').inspect(nav, { depth: null }));