material-ui - 如何将上下文传递给Enzyme mount方法以测试包含Material UI组件的组件？

Question

我正在尝试使用来自Enzyme的mount来测试我的组件，该组件中嵌套了多个Material UI组件。运行测试时出现此错误:
TypeError: Cannot read property 'prepareStyles' of undefined
经过一番挖掘后，I did found that a theme needs to be passed down in a context。我在测试中正在这样做，但仍然收到此错误。

我的测试:

import expect from  'expect';
import React, {PropTypes} from 'react';
import {mount} from 'enzyme';
import SearchBar from './SearchBar';
import getMuiTheme from 'material-ui/styles/getMuiTheme';

function setup() {
  const muiTheme = getMuiTheme();

  const props = {
    closeSearchBar: () => {},
    fetchSearchData: () => {},
    data: [],
    searching: false
  };

  return mount(<SearchBar {...props} />, {context: {muiTheme}});
}

describe('SearchBar Component', ()=> {

  it('Renders search toolbar properly', () => {
    const wrapper = setup();
    expect(wrapper.find('.toolbar').length).toBe(1);
    expect(wrapper.find('button').length).toBe(1);
  });
});

我的搜索栏组件是无状态组件，因此在任何情况下我都不会拉。但是即使我在，我仍然会遇到同样的错误。

我究竟做错了什么？

Answer 1

尝试在childContextTypes选项中添加mount:

return mount(
  <SearchBar {...props} />, {
    context: {muiTheme},
    childContextTypes: {muiTheme: React.PropTypes.object}
  }
);

通过这样做，您可以设置 enzyme 包装器，以便通过上下文使 muiTheme对它的 child 可用。