diff.spec.js

describe('Diff', function(){
  var cut, res;

  beforeEach(function(){
    cut = require('../js/htmldiff');
  });

  describe('When both inputs are the same', function(){
    beforeEach(function(){
      res = cut('input text', 'input text');
    });

    it('should return the text', function(){
      expect(res).equal('input text');
    });
  }); // describe('When both inputs are the same')

  describe('When a letter is added', function(){
    beforeEach(function(){
      res = cut('input', 'input 2');
    });

    it('should mark the new letter', function(){
      expect(res).to.equal('input<ins> 2</ins>');
    });
  }); // describe('When a letter is added')

  describe('Whitespace differences', function(){
    it('should collapse adjacent whitespace', function(){
      expect(cut('Much \n\t    spaces', 'Much spaces')).to.equal('Much spaces');
    });

    it('should consider non-breaking spaces as equal', function(){
      expect(cut('Hello&nbsp;world', 'Hello&#160;world')).to.equal('Hello&#160;world');
    });

    it('should consider non-breaking spaces and non-adjacent regular spaces as equal', function(){
      expect(cut('Hello&nbsp;world', 'Hello world')).to.equal('Hello world');
    });
  }); // describe('Whitespace differences')

  describe('When a class name is specified', function(){
    it('should include the class in the wrapper tags', function(){
      expect(cut('input', 'input 2', 'diff-result')).to.equal(
        'input<ins class="diff-result"> 2</ins>');
    });
  }); // describe('When a class name is specified')
}); // describe('Diff')