old_contents: let browserslist = require('../')
  
  let originData = browserslist.data
  
  beforeEach(() => {
    browserslist.data = {
      ie: {
        name: 'ie',
        released: ['9', '10', '11'],
        versions: ['9', '10', '11']
      },
      android: {
        name: 'android',
        released: ['4.4', '4.4.3-4.4.4', '67']
      }
    }
  })
  
  afterEach(() => {
    browserslist.data = originData
  })
  
  it('selects versions of browser', () => {
    expect(browserslist('last 2 ie versions')).toEqual(['ie 11', 'ie 10'])
  })
  
  it('supports pluralization', () => {
    expect(browserslist('last 1 ie version')).toEqual(['ie 11'])
  })
  
  it('has case insensitive aliases', () => {
    expect(browserslist('Last 01 Explorer Version')).toEqual(['ie 11'])
  })
  
  it('has special logic for android', () => {
    expect(browserslist('last 4 android versions')).toEqual([
      'android 67'
    ])
    expect(browserslist('last 31 android versions')).toEqual([
      'android 67', 'android 4.4.3-4.4.4'
    ])
  })
  
new_contents: let browserslist = require('../')
  
  let originData = browserslist.data
  
  beforeEach(() => {
    browserslist.data = {
      ie: {
        name: 'ie',
        released: ['9', '10', '11'],
        versions: ['9', '10', '11']
      },
      android: {
        name: 'android',
        released: ['4.4', '4.4.3-4.4.4', '67']
      }
    }
  })
  
  afterEach(() => {
    browserslist.data = originData
  })
  
  it('selects versions of browser', () => {
    expect(browserslist('last 2 ie versions')).toEqual(['ie 11', 'ie 10'])
  })
  
  it('does not include unreleased versions', () => {
    browserslist.data = originData
    expect(browserslist('last 2 safari versions')).not.toContain('safari TP')
  })
  
  it('supports pluralization', () => {
    expect(browserslist('last 1 ie version')).toEqual(['ie 11'])
  })
  
  it('has case insensitive aliases', () => {
    expect(browserslist('Last 01 Explorer Version')).toEqual(['ie 11'])
  })
  
  it('has special logic for android', () => {
    expect(browserslist('last 4 android versions')).toEqual([
      'android 67'
    ])
    expect(browserslist('last 31 android versions')).toEqual([
      'android 67', 'android 4.4.3-4.4.4'
    ])
  })
  
subject: Improve tests