Mocha-Chai投掷"导航器未定义"由于React-router组件

时间:2016-05-06 18:11:59

标签: mocha react-router chai

我正在为使用react-router的React组件编写测试。我和Chai和Chai-jQuery一起使用Mocha。

我的测试工作正常,直到我将一个组件从react-router导入一个组件(例如Link)。此时,我收到以下错误:

ReferenceError: navigator is not defined
    at Object.supportsHistory (/Users/nico/google-drive/code/agathos/client/node_modules/history/lib/DOMUtils.js:61:12)

我曾经在react-bootstrap上遇到类似的错误,直到我更新到react-bootstrap v0.29.3。我有最新版本的react-router v2.4.0(和历史v2.1.1)。但问题仍然存在。

我找到的唯一解决方案是将node_modules/history/lib/DOMUtilsnavigator更改为window.navigator。这是一个黑客,而不是一个好的解决方案。

我认为问题出在react-router上,但我没有解决方案。

以防万一,这是我的test-helper.js

import jquery from 'jquery';
import React from 'react';
import ReactDOM from 'react-dom';
import TestUtils from 'react-addons-test-utils';
import jsdom from 'jsdom';
import chai, { expect } from 'chai';
import chaiJquery from 'chai-jquery';
import { Provider } from 'react-redux';
import { createStore } from 'redux';
import reducers from './reducers';

// set up a testing environment to run like a browser in the command line
// create a fake browser and html doc
global.document = jsdom.jsdom('<!doctype html><html><body></body></html>');
global.window = global.document.defaultView;
// prevent jquery defaulting to the dom by giving it access to the global.window
const $ = jquery(window);

// build renderComponent function that should render a React class
function renderComponent(ComponentClass, props = {}, appState = {}) {
  const componentInstance =  TestUtils.renderIntoDocument(
    <Provider store={createStore(reducers, appState)}>
      <ComponentClass {...props} />
    </Provider>
  );
  // produces html
  return $(ReactDOM.findDOMNode(componentInstance));
}

//build a helper for simulating events
// $.fn allows you to add a custom function to your jquery library
$.fn.simulate = function(eventName, value) {
  if (value) {
    // `this` allows you to access the object appended to
    // `val()` is a jquery function that sets the value of selected html element
    this.val(value);
  }
  // the [] are object method selectors, which allow you to access e.g. Simulate.change
  TestUtils.Simulate[eventName](this[0]);
};

// set up chai jquery
chaiJquery(chai, chai.util, $);

export {renderComponent, expect};

1 个答案:

答案 0 :(得分:30)

似乎react-router假设navigator在全球范围内。

要解决此错误,您应该在测试设置阶段将navigator添加到全局范围:

global.navigator = {
  userAgent: 'node.js'
};