text: describe('[k-pattern][Unit] K.Pattern.Null', () => {
  
    it('should exist and be a function', () => {
      let expected = 'function',
          actual = typeof K.Pattern.Null;
  
      expect(actual).toEqual(expected);
    });
  
    it('should have a type property', () => {
      let expected = null,
          actual = K.Pattern.Null().type;
  
      expect(actual).toEqual(expected);
    });
  });
  