text: /* global describe, it, expect */
  
  import inc from './inc'
  
  describe('inc', () => {
    it('increments its argument', () => {
      expect( inc(-1) ).toBe(0)
      expect( inc(0) ).toBe(1)
      expect( inc(3.14).toPrecision(3) ).toBe('4.14')
      expect( inc(-Infinity) ).toBe(-Infinity)
      expect( inc(Infinity) ).toBe(Infinity)
    })
  })
  