text: import userOptedOut from '../../src/user-opted-out'
  
  describe('userOptedOut', () => {
    beforeEach(() => {
      global.window = {}
    })
  
    afterEach(() => {
      delete global.window
    })
  
    it('should export a function', () => {
      expect(userOptedOut).toBeInstanceOf(Function)
    })
  
    it('should return false if the user has not set any opt-out variables', () => {
      expect(userOptedOut('UA-123')).toBe(false)
    })
  
    it('should return true if user has opted out with a global vairable', () => {
      global.window['ga-disable-UA-123'] = true
      expect(userOptedOut('UA-123')).toBe(true)
    })
  })
  