酶装饰组件TypeError：无法读取属性＆＃39; contextTypes＆＃39;未定义的

Question

我正在使用酶和jest测试用JSCC修饰的组件，但是我收到以下错误：

  

TypeError：无法读取属性＆＃39; contextTypes＆＃39;未定义的

如何测试这个样式组件？

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import React from 'react'
import { shallow } from 'enzyme'
import { PdfViewer } from './PdfViewer'

const baseProps = {
  location: 'url',
  defaultPage: 1,
  classes: {},
  handlePageChanged: () => {},
}

describe('<PdfViewer />', () => {
  it('should work', () => {
    const wrapper = shallow(<PdfViewer {...baseProps} />)
    console.log(wrapper.debug())
  })
})

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组件装饰为：

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class PdfViewer extends React.Component{}
../
export default withStyles(styleSheet)(PdfViewer)

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Answer 1

import { muiTheme } from 'material-ui/styles'  
const wrapper = shallow(<PdfViewer {...baseProps} />, { context: { muiTheme } })