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 Enzyme 中的 mount 来测试我的组件，其中嵌套了多个 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，I did found that a theme needs to be passed down in a context。我在测试中这样做，但仍然出现此错误。

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);
  });
});

我的搜索栏组件是一个无状态组件，所以我没有在任何上下文中拉取。但即使我在，我仍然会遇到同样的错误。

我做错了什么？

Answer 1

尝试在 mount 选项中添加 childContextTypes：

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

通过这样做，您设置了 Enzyme 包装器以使其子级通过上下文可以使用 muiTheme。

Answer 2

这是我用 shallow 和 mount

测试 Material UI 的便捷方法

...
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider'
import getMuiTheme from 'material-ui/styles/getMuiTheme';

const muiTheme = getMuiTheme();
const shallowWithContext = (node) => shallow(node, {context: {muiTheme}, childContextTypes: {muiTheme: PropTypes.object}});

const mountWithContext = (node) => mount(
  node, {context: {muiTheme}, childContextTypes: {muiTheme: PropTypes.object}}
);


// now you can do
const wrapper = shallowWithContext(<Login auth={auth} onChange={() => 'test'} />);

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？

How to pass context down to the Enzyme mount method to test component which includes Material UI component?

material-ui

enzyme