metamask-extension/ui/app/components/error-message/tests/error-message.component.test.js

import React from 'react'
import assert from 'assert'
import { shallow } from 'enzyme'
import ErrorMessage from '../error-message.component'

describe('ErrorMessage Component', () => {
  const t = key => `translate ${key}`

  it('should render a message from props.errorMessage', () => {
    const wrapper = shallow(
      <ErrorMessage
        errorMessage="This is an error."
      />,
      { context: { t }}
    )

    assert.ok(wrapper)
    assert.equal(wrapper.find('.error-message').length, 1)
    assert.equal(wrapper.find('.error-message__icon').length, 1)
    assert.equal(wrapper.find('.error-message__text').text(), 'ALERT: This is an error.')
  })

  it('should render a message translated from props.errorKey', () => {
    const wrapper = shallow(
      <ErrorMessage
        errorKey="testKey"
      />,
      { context: { t }}
    )

    assert.ok(wrapper)
    assert.equal(wrapper.find('.error-message').length, 1)
    assert.equal(wrapper.find('.error-message__icon').length, 1)
    assert.equal(wrapper.find('.error-message__text').text(), 'ALERT: translate testKey')
  })
})