components#Textarea TypeScript Examples

The following examples show how to use components#Textarea. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: index.test.tsx    From geist-ui with MIT License 5 votes vote down vote up 
describe('Textarea', () => {
  it('should render correctly', () => {
    const wrapper = mount(<Textarea placeholder="placeholder" />)
    expect(wrapper.html()).toMatchSnapshot()
    expect(() => wrapper.unmount()).not.toThrow()
  })

  it('should work with different styles', () => {
    const wrapper = mount(
      <div>
        <Textarea type="secondary" />
        <Textarea width="20%" />
        <Textarea height="100px" />
      </div>,
    )
    expect(wrapper.html()).toMatchSnapshot()
    expect(() => wrapper.unmount()).not.toThrow()
  })

  it('should set textarea from value', () => {
    const wrapper = mount(<Textarea initialValue="test-value" />)
    let el = wrapper.find('textarea').getDOMNode() as HTMLTextAreaElement
    expect(el.value).toEqual('test-value')

    wrapper.setProps({ value: 'test-value2' })
    el = wrapper.find('textarea').getDOMNode() as HTMLTextAreaElement
    expect(el.value).toEqual('test-value2')
  })

  it('should trigger events when textarea changed', () => {
    let value = ''
    const handler = jest.fn().mockImplementation(e => (value = e.target.value))
    const wrapper = mount(<Textarea onChange={handler} />)
    wrapper.find('textarea').simulate('change', { target: { value: 'test-value' } })
    expect(handler).toHaveBeenCalled()
    expect(value).toEqual('test-value')
    handler.mockRestore()
  })

  it('should ignore events when disabled or readonly', () => {
    const handler = jest.fn()
    const wrapper = mount(<Textarea onChange={handler} disabled />)
    wrapper.find('textarea').simulate('change', { target: { value: 'test-value' } })
    expect(handler).not.toHaveBeenCalled()

    wrapper.setProps({ disabled: false, readOnly: true })
    wrapper.find('textarea').simulate('change', { target: { value: 'test-value2' } })
    expect(handler).not.toHaveBeenCalled()
    handler.mockRestore()
  })

  it('should pass through blur event', () => {
    const blurHandler = jest.fn()
    const focusHandler = jest.fn()
    const wrapper = mount(<Textarea onBlur={blurHandler} onFocus={focusHandler} />)

    wrapper.find('textarea').simulate('focus', nativeEvent)
    expect(focusHandler).toHaveBeenCalled()

    wrapper.find('textarea').simulate('blur', nativeEvent)
    expect(blurHandler).toHaveBeenCalled()
  })
})