message: add more Flash tests
diff: import React from 'react'
  import Flash from '../Flash'
  -import {render} from '../utils/testing'
  +import {render, renderClasses} from '../utils/testing'
  describe('Flash', () => {
  it('renders a <div> with "Flash" class', () => {
  @@ -8,4 +8,14 @@ describe('Flash', () => {
  expect(rendered.type).toEqual('div')
  expect(rendered.props.className).toEqual('flash')
  })
  +
  + it('respects the "full" prop', () => {
  + expect(renderClasses(<Flash full />)).toEqual(['flash', 'flash-full'])
  + })
  +
  + it('respects the "scheme" prop', () => {
  + expect(renderClasses(<Flash scheme="yellow" />)).toEqual(['flash', 'flash-warn'])
  + expect(renderClasses(<Flash scheme="red" />)).toEqual(['flash', 'flash-error'])
  + expect(renderClasses(<Flash scheme="green" />)).toEqual(['flash', 'flash-success'])
  + })
  })
  