text: const cryptoHash = require('./crypto-hash');
  
  describe('cryptoHash()', () => {
      it('generates a SHA-256 hashed output', () => {
          expect(cryptoHash('foo'))
              .toEqual('b2213295d564916f89a6a42455567c87c3f480fcd7a1c15e220f17d7169a790b');
      });
  
      it('products the same hash with the same input arguments in any order', () => {
          expect(cryptoHash('1', '2', '3'))
              .toEqual(cryptoHash('3', '2', '1'));
      });
  
      it('produces a unique hash when the properties have changed on an input', () => {
          const foo = {}
          const originalHash = cryptoHash(foo)
          foo['a'] = 'a'
  
          expect(cryptoHash(foo)).not.toEqual(originalHash)
      })
  });