message: update FlexContainer tests
diff: import React from 'react'
  import FlexContainer from '../FlexContainer'
  -import {renderClasses} from '../utils/testing'
  +import {renderClasses, rendersClass} from '../utils/testing'
  +
  +describe('FlexContainer', () => {
  it('FlexContainer renders wrap classes', () => {
  expect(renderClasses(<FlexContainer wrap="nowrap" />)).toEqual(['d-flex', 'flex-nowrap'])
  })
  @@ -25,3 +27,12 @@ it('FlexContainer renders alignContent classes', () => {
  it('FlexContainer renders inline classes', () => {
  expect(renderClasses(<FlexContainer inline />)).toEqual(['d-inline-flex'])
  })
  +
  + it('respects margin utility prop', () => {
  + expect(rendersClass(<FlexContainer m={4} />, 'm-4')).toEqual(true)
  + })
  +
  + it('respects padding utility prop', () => {
  + expect(rendersClass(<FlexContainer p={4} />, 'p-4')).toEqual(true)
  + })
  +})
  