tests.js

describe('DOM assertions', function() {
  var inspect,
      subject

  function parse(str) {
    var testEl = document.getElementById('test')
    testEl.innerHTML = str
    return testEl.children[0]
  }

  chai.use(function(chai, utils) {
    inspect = utils.objDisplay

    chai.Assertion.addMethod('fail', function(message) {
      var obj = utils.flag(this, 'object')

      new chai.Assertion(obj).is.a('function')

      try {
        obj()
      } catch (err) {
        this.assert(
          err instanceof chai.AssertionError
          , 'expected #{this} to fail, but it threw ' + inspect(err))
        this.assert(
          err.message === message
          , 'expected #{this} to fail with ' + inspect(message) + ', but got ' + inspect(err.message))
        return
      }

      this.assert(false, 'expected #{this} to fail')
    })
  })

  describe('attr', function() {
    beforeEach(function() {
      subject = parse('<div name="foo"></div>')
    });

    describe('when only attribute name is provided', function() {
      it('passes when the element has the attribute', function() {
        subject.should.have.attr('name')
      })

      it('passes negated when the element does not have the attribute', function() {
        subject.should.not.have.attribute('bar')
      })

      it('fails when the element does not have the attribute', function() {
        (function() {
          subject.should.have.attr('bar')
        }).should.fail('expected div[name="foo"] to have an attribute \'bar\'')
      })

      it('fails negated when the element has the attribute', function() {
        (function() {
          subject.should.not.have.attribute('name')
        }).should.fail('expected div[name="foo"] not to have an attribute \'name\'')
      })
    })

    describe('when only attribute name is provided', function() {
      var attrWithNoValue = parse('<div disabled></div>')
      it('passes when the element has the attribute', function() {
        attrWithNoValue.should.have.attr('disabled')
      })

      it('passes negated when the element does not have the attribute', function() {
        attrWithNoValue.should.not.have.attribute('bar')
      })

      it('fails when the element does not have the attribute', function() {
        (function() {
          attrWithNoValue.should.have.attr('bar')
        }).should.fail('expected div[disabled] to have an attribute \'bar\'')
      })

      it('fails negated when the element has the attribute', function() {
        (function() {
          attrWithNoValue.should.not.have.attribute('disabled')
        }).should.fail('expected div[disabled] not to have an attribute \'disabled\'')
      })
    })

    describe('when attribute name and value are provided', function() {
      it('passes when the element has the attribute with the given value', function() {
        subject.should.have.attribute('name', 'foo')
      })

      it('passes negated when the element does not have the attribute', function() {
        subject.should.not.have.attr('bar', 'foo')
      })

      it('passes negated when the element has the attribute with a different value', function() {
        subject.should.not.have.attr('name', 'bar')
      })

      it('fails when the element does not have the attribute', function() {
        (function() {
          subject.should.have.attr('bar', 'foo')
        }).should.fail('expected div[name="foo"] to have an attribute \'bar\'')
      })

      it('fails when the element has the attribute with a different value', function() {
        (function() {
          subject.should.have.attribute('name', 'bar')
        }).should.fail('expected div[name="foo"] to have an attribute \'name\' with the value \'bar\', but the value was \'foo\'')
      })

      it('fails negated when the element has the attribute with the given value', function() {
        (function() {
          subject.should.not.have.attr('name', 'foo')
        }).should.fail('expected div[name="foo"] not to have an attribute \'name\' with the value \'foo\'')
      })
    })

    it('chains', function() {
      subject.should.have.attr('name').equal('foo')
    })
  })

  describe('class', function() {
    beforeEach(function() {
      subject = parse('<div class="foo shazam  baz"></div>')
    });

    it('passes when the element has the class', function() {
      subject.should.have.class('foo')
    })

    it('passes when the element has the class separated with two spaces', function () {
      subject.should.have.class('baz');
    })

    it('passes when the element has the class matching given regex', function () {
      subject.should.have.class(/foo/)
    })

    it('passes negated when the element does not have the class', function() {
      subject.should.not.have.class('bar')
    })

    it('passes negated when the element does not have the class matching given regex', function () {
      subject.should.not.have.class(/bar/)
    })

    it('fails when the element does not have the class', function() {
      (function() {
        subject.should.have.class('bar')
      }).should.fail('expected div.foo.shazam.baz to have class \'bar\'')
    })

    it('fails when the element does not have the class matching given regex', function() {
      (function() {
        subject.should.have.class(/bar/)
      }).should.fail('expected div.foo.shazam.baz to have class matching /bar/')
    })

    it('fails negated when the element has the class', function() {
      (function() {
        subject.should.not.have.class('foo')
      }).should.fail('expected div.foo.shazam.baz not to have class \'foo\'')
    })

    it('fails negated when the element has the class matching given regex', function() {
      (function() {
        subject.should.not.have.class(/foo/)
      }).should.fail('expected div.foo.shazam.baz not to have class matching /foo/')
    })
  })

  describe('id', function() {
    beforeEach(function() {
      subject = parse('<div id="foo" class="yum" required disabled="disabled"></div>')
    });

    it('passes when the element has the id', function() {
      subject.should.have.id('foo')
    })

    it('passes negated when the element does not have the id', function() {
      subject.should.not.have.id('bar')
    })

    it('passes negated when the element does not have an id', function() {
      document.createElement('div').should.not.have.id('bar')
    })

    it('fails when the element does not have the id', function() {
      (function() {
        subject.should.have.id('bar')
      }).should.fail('expected div#foo.yum[required][disabled="disabled"] to have id \'bar\'')
    })

    it('fails negated when the element has the id', function() {
      (function() {
        subject.should.not.have.id('foo')
      }).should.fail('expected div#foo.yum[required][disabled="disabled"] not to have id \'foo\'')
    })

    it('fails when the element does not have an id', function() {
      subject = parse('<div></div>');
      (function() {
        subject.should.have.id('foo')
      }).should.fail('expected div to have id \'foo\'')
    })
  })

  describe('html', function() {
    beforeEach(function() {
      subject = parse('<section>A <span>span</span></section>')
    });

    it('passes when the HTML matches', function() {
      subject.should.have.html('A <span>span</span>')
    })

    it('passes negated when the HTML doesn\'t match', function() {
      subject.should.not.have.html('<span>div</span>')
    })

    it('fails when the HTML doesn\'t match', function() {
      (function() {
        subject.should.have.html('<span>div</span>')
      }).should.fail('expected section to have HTML \'<span>div</span>\', but the HTML was \'A <span>span</span>\'')
    })

    it('fails negated when the HTML matches', function() {
      (function() {
        subject.should.not.have.html('A <span>span</span>')
      }).should.fail('expected section not to have HTML \'A <span>span</span>\'')
    })

    it('passes when the HTML contains', function() {
      subject.should.contain.html('<span>span</span>')
    })

    it('passes negated when the HTML doesn\'t contain', function() {
      subject.should.not.contain.html('<span>div</span>')
    })

    it('fails when the HTML doesn\'t contain', function() {
      (function() {
        subject.should.contain.html('<span>div</span>')
      }).should.fail('expected \'A <span>span</span>\' to contain HTML \'<span>div</span>\'')
    })

    it('fails negated when the HTML contains', function() {
      (function() {
        subject.should.not.contain.html('<span>span</span>')
      }).should.fail('expected \'A <span>span</span>\' not to contain HTML \'<span>span</span>\'')
    })
  })

  describe('text', function() {
    describe('against HTMLElement', function() {
      beforeEach(function() {
        subject = parse('<div> foo </div>')
      });

      it('passes when the text matches', function() {
        subject.should.have.text(' foo ')
      })

      it('passes negated when the text doesn\'t match', function() {
        subject.should.not.have.text(' bar ')
      })

      it('fails when the text doesn\'t match', function() {
        (function() {
          subject.should.have.text('bar')
        }).should.fail('expected div to have text \'bar\', but the text was \' foo \'')
      })

      it('fails negated when the text matches', function() {
        (function() {
          subject.should.not.have.text(' foo ')
        }).should.fail('expected div not to have text \' foo \'')
      })

      it('passes when the text contains', function() {
        subject.should.contains.text('fo')
      })

      it('passes negated when the text doesn\'t contain', function() {
        subject.should.not.contain.text('bar')
      })

      it('fails when the text doesn\'t contain', function() {
        (function() {
          subject.should.contain.text('bar')
        }).should.fail('expected div to contain \'bar\', but the text was \' foo \'')
      })

      it('fails negated when the text contains', function() {
        (function() {
          subject.should.not.contain.text('fo')
        }).should.fail('expected div not to contain \'fo\', but the text was \' foo \'')
      })

      it('passes when the trimmed text matches', function() {
        subject.should.have.trimmed.text('foo')
      })

      it('fails negated when the trimmed text matches', function() {
        (function() {
          subject.should.not.have.trimmed.text('foo')
        }).should.fail('expected div not to have trimmed text \'foo\'')
      })

      it('passes when the trimmed text contains', function() {
        subject.should.contains.trimmed.text('fo')
      })

      it('fails negated when the trimmed text contains', function() {
        (function() {
          subject.should.not.contain.trimmed.text('fo')
        }).should.fail('expected div not to contain \'fo\', but the trimmed text was \'foo\'')
      })

      it('passes when the rendered test matches', function() {
        subject.should.have.rendered.text('foo');
      });

      it('failes negated when the rendered test matches', function() {
        (function() {
          subject.should.not.have.rendered.text('foo')
        }).should.fail('expected div not to have rendered text \'foo\'')
      });
    })

    describe('against NodeList', function() {
      var textNodes;

      beforeEach(function() {
        subject = parse('<div><span> cherry </span><div>banana</div><span> <p>strawberry</p></span> \n<span> &gt; watermelon</span>pineapple</div>').querySelectorAll('div,span,p')
        textNodes = Array.prototype.map.call(subject, function(el) { return el.textContent })
      });

      describe('given a string', function() {
        var fullText

        beforeEach(function() {
          fullText = textNodes.join('')
        });

        it('passes when the combined text of all child nodes match', function() {
          subject.should.have.text(fullText)
        })

        it('passes negated when the combined text of all child nodes does not match', function() {
          subject.should.not.have.text('cherry banana strawberry watermelon pineapple')
        })

        it('fails when the text doesn\'t match', function() {
          (function() {
            subject.should.have.text('watermelon')
          }).should.fail("expected span, div, span, p, span to have text 'watermelon', but the text was '" + fullText + "'")
        })

        it('fails negated when the text matches', function() {
          (function() {
            subject.should.not.have.text(fullText)
          }).should.fail("expected span, div, span, p, span not to have text '" + fullText + "'")
        })

        it('passes when the text contains', function() {
          subject.should.contain.text('strawberry')
        })

        it('passes when the trimmed text contains', function() {
          subject.should.contain.text('cherry')
        })

        it('passes negated when the text doesn\'t contain', function() {
          subject.should.not.contain.text('raspberry')
        })

        it('fails when the text doesn\'t contain', function() {
          (function() {
            subject.should.contain.text('raspberry')
          }).should.fail("expected span, div, span, p, span to contain 'raspberry', but the text was '" + fullText + "'")
        })

        it('fails negated when the text contains', function() {
          (function() {
            subject.should.not.contain.text('strawberry')
          }).should.fail("expected span, div, span, p, span not to contain 'strawberry', but the text was '" + fullText + "'")
        })

        it('fails negated when the trimmed text contains', function() {
          var trimmedFullText = Array.prototype.map.call(subject, function(el) { return el.textContent.trim() }).join('')
          ;(function() {
            subject.should.not.contain.trimmed.text('cherry')
          }).should.fail("expected span, div, span, p, span not to contain 'cherry', but the trimmed text was '" + trimmedFullText + "'")
        })

        it('passes when the combined rendered text of all child nodes match', function() {
          subject.should.have.rendered.text('cherrybananastrawberrystrawberry> watermelon')
        })

        it('fails when the rendered text doesn\'t match', function() {
          (function() {
            subject.should.have.rendered.text('watermelon')
          }).should.fail("expected span, div, span, p, span to have rendered text 'watermelon', but the rendered text was 'cherrybananastrawberrystrawberry> watermelon'")
        })
      })

      describe('given an array', function() {
        var joinedText;

        beforeEach(function() {
          joinedText = textNodes.join()
        });

        it('passes when the text deeply equals of all child text nodes', function() {
          subject.should.have.text(textNodes)
        })

        it('passes negated when the text does not deeply equal the child text nodes', function() {
          subject.should.not.have.text(['strawberry', 'cherry', 'banana', 'watermelon'])
        })

        it('fails when the text does not deeply equal the child text nodes', function() {
          (function() {
            subject.should.have.text(['strawberry', 'cherry', 'banana', 'watermelon'])
          }).should.fail("expected span, div, span, p, span to have text 'strawberry,cherry,banana,watermelon', but the text was '" + joinedText + "'")
        })

        it('fails negated when the text deeply equals of all child text nodes', function() {
          (function() {
            subject.should.not.have.text(textNodes)
          }).should.fail("expected span, div, span, p, span not to have text '" + joinedText + "'")
        })

        it('passes when the NodeList contains children with exact texts of all entries', function() {
          subject.should.contain.text(['strawberry', ' cherry '])
        })

        it('passes when the NodeList contains children with trimmed texts of all entries', function() {
          subject.should.contain.trimmed.text(['strawberry', 'cherry'])
        })

        it('passes negated when the NodeList does not contain any child with the exact text node', function() {
          subject.should.not.contain.text(['raspberry', 'cherry', 'watermelon'])
        })

        it('fails when the text does not contain any element', function() {
          (function() {
            subject.should.contain.text(['raspberry'])
          }).should.fail("expected span, div, span, p, span to contain 'raspberry', but the text was '" + joinedText + "'")
        })

        it('fails when the text does not contain all elements', function() {
          (function() {
            subject.should.contain.text(['raspberry', 'strawberry'])
          }).should.fail("expected span, div, span, p, span to contain 'raspberry,strawberry', but the text was '" + joinedText + "'")
        })

        it('fails negated when the text contains some elements', function() {
          (function() {
            subject.should.not.contain.text(['strawberry', 'honeydew'])
          }).should.fail("expected span, div, span, p, span not to contain 'strawberry,honeydew', but the text was '" + joinedText + "'")
        })

        it('fails negated when the trimmed text contains some elements', function() {
          var joinedTrimmedText = Array.prototype.map.call(subject, function(el) { return el.textContent.trim() }).join()
          ;(function() {
            subject.should.not.contain.trimmed.text(['cherry', 'honeydew'])
          }).should.fail("expected span, div, span, p, span not to contain 'cherry,honeydew', but the trimmed text was '" + joinedTrimmedText + "'")
        })

        it('passes when the combined rendered text of all child nodes match', function() {
          subject.should.have.rendered.text(Array.prototype.map.call(subject, function(el) { return el.innerText }))
        })

        it('fails when the rendered text doesn\'t match', function() {
          (function() {
            subject.should.have.rendered.text(['strawberry', 'cherry', 'banana', 'watermelon'])
          }).should.fail("expected span, div, span, p, span to have rendered text 'strawberry,cherry,banana,watermelon', but the rendered text was 'cherry,banana,strawberry,strawberry,> watermelon'")
        })
      })
    })
  })

  describe('value', function() {
    beforeEach(function() {
      subject = parse('<input value="foo">')
    });

    it('passes when the value matches', function() {
      subject.should.have.value('foo')
    })

    it('passes negated when the value doesn\'t match', function() {
      subject.should.not.have.value('bar')
    })

    it('fails when the value doesn\'t match', function() {
      (function() {
        subject.should.have.value('bar')
      }).should.fail('expected input[value="foo"] to have value \'bar\', but the value was \'foo\'')
    })

    it('fails negated when the value matches', function() {
      (function() {
        subject.should.not.have.value('foo')
      }).should.fail('expected input[value="foo"] not to have value \'foo\'')
    })
  })

  describe('exist', function() {
    it('preserves existing behavior on non-NodeList objects', function() {
      ({}).should.exist
      true.should.exist
    })

    var existent, nonexistent

    beforeEach(function() {
      existent = document.querySelectorAll('#mocha')
      nonexistent = document.querySelectorAll('.nonexistent')
    })

    it('passes when the selection isn\'t empty', function() {
      existent.should.exist
    })

    it('passes negated when the selection is empty', function() {
      nonexistent.should.not.exist
    })

    it('fails when the selection is empty', function() {
      (function() {
        nonexistent.should.exist
      }).should.fail('expected an empty NodeList to have nodes')
    })

    it('fails negated when the selection isn\'t empty', function() {
      (function() {
        existent.should.not.exist
      }).should.fail('expected div#mocha to not exist')
    })
  })

  describe('empty', function() {
    it('preserves existing behavior on non-NodeList objects', function() {
      ({}).should.be.empty
    })

    var empty = document.createElement('div')
    var nonempty = parse('<div class="non empty"><span></span></div>')

    it('passes when the elment has no children', function() {
      empty.should.be.empty
    })

    it('passes negated when the elment has children', function() {
      nonempty.should.not.be.empty
    })

    it('fails when the elment has children', function() {
      (function() {
        nonempty.should.be.empty
      }).should.fail('expected div.non.empty to be empty')
    })

    it('fails negated when the elment has no children', function() {
      (function() {
        empty.should.not.be.empty
      }).should.fail('expected div to not be empty')
    })
  })

  describe('length', function() {
    it('preserves existing behavior on arrays', function() {
      [].should.have.length(0);

      (function() {
        [].should.have.length(1)
      }).should.fail('expected [] to have a length of 1 but got 0');
    });

    it('supports an HTMLElement', function() {
      subject = parse('<ul><li>1</li><li>2</li></ul>');
      subject.should.have.length(2);
      subject.should.not.have.length(3);

      (function() {
        subject.should.not.have.length(2);
      }).should.fail('expected ul to not have 2 children');

      (function() {
        subject.should.have.length(3);
      }).should.fail('expected ul to have 3 children but it had 2 children');
    });

    it('supports a NodeList', function() {
      subject = parse('<ul><li>1</li><li>2</li></ul>').querySelectorAll('li');
      subject.should.have.length(2);
      subject.should.not.have.length(3);

      (function() {
        subject.should.not.have.length(2);
      }).should.fail('expected li, li to not have 2 children');

      (function() {
        subject.should.have.length(3);
      }).should.fail('expected li, li to have 3 children but it had 2 children')
    })
  })

  describe('match', function() {
    it('preserves existing behavior on strings', function() {
      ('hello').should.match(/ello/)
    })

    var subjectList
    beforeEach(function() {
      subject = parse('<div id="foo"></div>')
      subjectList = document.querySelectorAll('body')
    })

    it('passes when the selection matches the given selector', function() {
      subject.should.match('#foo')
      subjectList.should.match('body')
    })

    it('passes negated when the selection does not match the given selector', function() {
      subject.should.not.match('#bar')
      subjectList.should.not.match('#bar')
    })

    it('passes negated when the NodeList is empty', function() {
      document.querySelectorAll('.nonexistent').should.not.match('.foo')
    })

    it('fails when the selection does not match the given selector', function() {
      (function() {
        subject.should.match('#bar')
      }).should.fail('expected div#foo to match \'#bar\'')
      ;(function() {
        subjectList.should.match('#bar')
      }).should.fail('expected body to match \'#bar\'')
    })

    it('fails negated when the selection matches the given selector', function() {
      (function() {
        subject.should.not.match('#foo')
      }).should.fail('expected div#foo to not match \'#foo\'')
      ;(function() {
        subjectList.should.not.match('body')
      }).should.fail('expected body to not match \'body\'')
    })
  })

  describe('contain', function() {
    it('preserves existing behavior on arrays and strings', function() {
      'example text'.should.contain('example')
      'foo'.should.not.contain('bar');
      ({
        foo: 1,
        bar: 2
      }).should.contain.keys('foo');

      (function() {
        'foo'.should.contain('bar')
      }).should.fail('expected \'foo\' to include \'bar\'');

      (function() {
        'foo'.should.not.contain('bar').and.not.contain('foo')
      }).should.fail('expected \'foo\' to not include \'foo\'')
    })

    describe('text', function() {
      beforeEach(function() {
        subject = parse('<div><span class="blurb">example text</span><p>lorem ipsum</p></div>')
      });

      it('passes when the element contains the given text via textContent', function() {
        subject.should.contain('span.blurb')
      })

      it('passes negated when the element does not contain the given text', function() {
        subject.should.not.contain('example')
      })

      it('fails when the element does not contain the given text', function() {
        (function() {
          subject.should.contain('aside')
        }).should.fail('expected div to contain \'aside\'')
      })

      it('fails negated when the element contains the given text', function() {
        (function() {
          subject.should.not.contain('.blurb')
        }).should.fail('expected div to not contain \'.blurb\'')
      })

      it('should not change the assertion subject', function() {
        subject.should.contain('.blurb').and.contain('p')
      })
    })

    describe('element', function() {
      var child,
          nonchild

      beforeEach(function() {
        subject = parse('<div><span class="blurb">example text</span><p>lorem ipsum</p></div>')
        child = subject.children[0]
        nonchild = document.createElement('dd')
      });

      it('passes when the element contains the given element', function() {
        subject.should.contain(child)
      })

      it('passes negated when the element does not contain the given element', function() {
        subject.should.not.contain(nonchild)
      })

      it('fails when the element does not contain the given element', function() {
        (function() {
          subject.should.contain(nonchild)
        }).should.fail('expected div to contain dd')
      })

      it('fails negated when the element contains the given element', function() {
        (function() {
          subject.should.not.contain(child)
        }).should.fail('expected div to not contain span.blurb')
      })

      it('should not change the assertion subject', function() {
        subject.should.contain(child).and.contain(subject.children[1])
      })
    })
  })

  describe('descendant', function() {
    beforeEach(function() {
      subject = parse('<div><header><span class="blurb">example text</span></header><p>lorem ipsum <em>dolor</em></p></div>')
    });

    describe('text', function() {
      it('passes when the element contains the given selector', function() {
        subject.should.have.descendant('span.blurb')
      })

      it('passes negated when the element does not contain the given selector', function() {
        subject.should.not.have.descendant('example')
      })

      it('fails when the element does not contain the given selector', function() {
        (function() {
          subject.should.have.descendant('aside')
        }).should.fail('expected div to have descendant \'aside\'')
      })

      it('fails negated when the element does not have the given selector', function() {
        (function() {
          subject.should.not.have.descendant('.blurb')
        }).should.fail('expected div to not have descendant \'.blurb\'')
      })

      it('should change the assertion context', function() {
        subject.should.have.descendant('span').and.have.class('blurb')
        subject.should.have.descendant('header').and.not.contain('lorem ipsum')
      })
    })

    describe('element', function() {
      var child,
          nonchild

      beforeEach(function() {
        child = subject.querySelector('span.blurb'),
        nonchild = document.createElement('dd')
      });

      it('passes when the subject contains the given element', function() {
        subject.should.have.descendant(child)
      })

      it('passes negated when the subject does not contain the given element', function() {
        subject.should.not.have.descendant(nonchild)
      })

      it('fails when the subject does not contain the given element', function() {
        (function() {
          subject.should.have.descendant(nonchild)
        }).should.fail('expected div to contain dd')
      })

      it('fails negated when the subject contains the given element', function() {
        (function() {
          subject.should.not.have.descendant(child)
        }).should.fail('expected div to not contain span.blurb')
      })

      it('should change the assertion subject', function() {
        subject.should.contain(child).and.contain(subject.children[1])
      })
    })
  })

  describe('descendants', function() {
    beforeEach(function() {
      subject = parse('<div><p>lorem ipsum <em>dolor</em></p><ul><li>one</li><li>two</li><li>three</li></ul></div>')
    });

    it('passes when the element contains the given selector', function() {
      subject.should.have.descendants('ul li')
    })

    it('passes negated when the element does not contain the given selector', function() {
      subject.should.not.have.descendants('p.foo')
    })

    it('fails when the element does not contain the given selector', function() {
      (function() {
        subject.should.have.descendants('aside')
      }).should.fail('expected div to have descendants \'aside\'')
    })

    it('fails negated when the element does not have the given selector', function() {
      (function() {
        subject.should.not.have.descendants('p')
      }).should.fail('expected div to not have descendants \'p\'')
    })

    it('should change the assertion context', function() {
      subject.should.have.descendants('li').with.length(3)
      subject.should.have.descendants('em').and.contain.text('dolor')
    })
  })

  describe('displayed', function() {
    var div = document.createElement('div'),
        notDisplayedViaStyle = parse('<div style="display: none"></div>'),
        notDisplayedViaCSS = parse('<div class="hidden"></div>'),
        inlineDiv = parse('<div style="display: inline-block"></div>')

    before(function() {
      document.styleSheets[1].insertRule('.hidden { display: none; }', 0);
      document.body.appendChild(notDisplayedViaCSS)
      document.body.appendChild(div)
    })
    after(function() {
      document.body.removeChild(notDisplayedViaCSS)
      document.body.removeChild(div)
    })

    it('passes when displayed (any display value but none)', function() {
      div.should.be.displayed
      inlineDiv.should.be.displayed
    })

    it('passes negated when the elment has display set to "none"', function() {
      notDisplayedViaStyle.should.not.be.displayed
      notDisplayedViaCSS.should.not.be.displayed
    })

    it('fails when the element has display: none', function() {
      (function() {
        notDisplayedViaStyle.should.be.displayed
      }).should.fail('expected div[style="display: none"] to be displayed, but it was not')

      ;(function() {
        notDisplayedViaCSS.should.be.displayed
      }).should.fail('expected div.hidden to be displayed, but it was not')
    })

    it('fails negated when the element is displayed', function() {
      (function() {
        div.should.not.be.displayed
      }).should.fail('expected div to not be displayed, but it was as block')

      ;(function() {
        inlineDiv.should.not.be.displayed
      }).should.fail('expected div[style="display: inline-block"] to not be displayed, but it was as inline-block')
    })

    it('should be chainable', function() {
      div.should.be.displayed.and.exist.and.be.ok
    })
  })

  describe('visible', function() {
    var div = document.createElement('div'),
        hiddenViaStyle = parse('<div style="visibility: hidden"></div>'),
        collapsedViaStyle = parse('<div style="visibility: collapse"></div>'),
        hiddenViaCSS = parse('<div class="invisible"></div>'),
        collapsedViaCSS = parse('<div class="collapsed"></div>')

    before(function() {
      document.styleSheets[1].insertRule('.invisible { visibility: hidden }', 0);
      document.styleSheets[1].insertRule('.collapsed { visibility: collapse }', 0);
      document.body.appendChild(hiddenViaCSS)
      document.body.appendChild(collapsedViaCSS)
      document.body.appendChild(div)
    })
    after(function() {
      document.body.removeChild(hiddenViaCSS)
      document.body.removeChild(collapsedViaCSS)
      document.body.removeChild(div)
    })

    it('passes when visible (any visibility value but hidden or collapse)', function() {
      div.should.be.visible
    })

    it('passes negated when the elment has display set to "hidden" or "collapse"', function() {
      hiddenViaStyle.should.not.be.visible
      collapsedViaStyle.should.not.be.visible
      hiddenViaCSS.should.not.be.visible
      collapsedViaCSS.should.not.be.visible
    })

    it('fails when the element has visibility: hidden', function() {
      (function() {
        hiddenViaStyle.should.be.visible
      }).should.fail('expected div[style="visibility: hidden"] to be visible, but it was hidden')

      ;(function() {
        hiddenViaCSS.should.be.visible
      }).should.fail('expected div.invisible to be visible, but it was hidden')
    })

    it('fails when the element has visibility: collapse', function() {
      (function() {
        collapsedViaStyle.should.be.visible
      }).should.fail('expected div[style="visibility: collapse"] to be visible, but it was collapsed')

      ;(function() {
        collapsedViaCSS.should.be.visible
      }).should.fail('expected div.collapsed to be visible, but it was collapsed')
    })

    it('fails negated when the element is visible', function() {
      (function() {
        div.should.not.be.visible
      }).should.fail('expected div to not be visible, but it was')
    })

    it('should be chainable', function() {
      div.should.be.visible.and.exist.and.be.ok
    })
  })

  describe('tagName', function() {
    var div = document.createElement('div'),
        divWithContent = parse('<div><span>test</span></div>'),
        span = parse('<span>Test</span>')

    it('passes when the tagName is equal', function() {
      div.should.have.tagName('div')
      divWithContent.should.have.tagName('div')
      span.should.have.tagName('span')
    })

    it('passes case insensitive', function() {
      div.should.have.tagName('DIV')
      div.should.have.tagName('diV')
    })

    it('passes negated', function() {
      div.should.not.have.tagName('somethingelse')
      span.should.not.have.tagName('div')
    })

    it('should be chainable', function() {
      div.should.have.tagName('div').and.exist.and.be.ok
    })
  })

  describe('style', function() {
    var div = parse('<div style="color: red;">test</div>')

    before(function() {
      document.body.appendChild(div)
    })

    after(function() {
      document.body.removeChild(div)
    })

    it('passes when the style is equal', function() {
      div.should.have.style('color', 'rgb(255, 0, 0)')
    })

    it('passes negated', function() {
      div.should.not.have.style('color', 'rgb(0, 0, 255)')
    })

    it('should be chainable', function() {
      div.should.have.style('color', 'rgb(255, 0, 0)').and.exist.and.be.ok
    })
  })

  describe('util.elToString', function() {
    it('should give a friendly name for a HTMLElement', function() {
      chai.util.elToString(parse('<span class="foo" bar="baz"></span>')).should.equal('span.foo[bar="baz"]')
    })

    it('should give a friendly name for a NodeList', function() {
      var div = document.createElement('div')
      div.innerHTML = '<span class="nodelist-test" aria-labelledby="name"></span><custom class="nodelist-test cool"></custom>'
      chai.util.elToString(div.querySelectorAll('.nodelist-test'))
        .should.equal('span.nodelist-test[aria-labelledby="name"], custom.nodelist-test.cool')
    })

    it('should truncate long NodeLists', function() {
      var div = document.createElement('div')
      div.innerHTML = [1, 2, 3, 4, 5, 6, 7, 8].map(function(n) { return '<p id="nlt' + n + '"></p>' }).join('')
      chai.util.elToString(div.querySelectorAll('p'))
        .should.equal('p#nlt1, p#nlt2, p#nlt3, p#nlt4, p#nlt5... (+3 more)')
    })
  })

  describe('focus', function() {
    var container = document.getElementById("mocha");
    var focused = parse('<input type="text" id="focused" name="focused">');
    var blurred = parse('<input type="text" id="blurred" name="blurred">');

    beforeEach(function() {
      container.appendChild(focused)
      container.appendChild(blurred)
      focused.focus();
    });

    afterEach(function() {
      container.removeChild(focused)
      container.removeChild(blurred)
    });

    it("passes when the element has focus", function(){
      focused.should.have.focus;
    });

    it("passes negated when the element does not have focus", function(){
      blurred.should.not.have.focus;
    });

    it("fails when the element does not have focus", function(){
      (function(){
        blurred.should.have.focus;
      }).should.fail("expected " + inspect(blurred) + " to have focus");
    });

    it("fails negated when element has focus", function(){
      (function(){
        focused.should.not.have.focus;
      }).should.fail("expected " + inspect(focused) + " not to have focus");
    });
  })

  describe('checked', function() {
    var span = parse('<span>Test</span>')
      , input = parse('<input>')
      , checkedCheckbox = parse('<input type="checkbox" checked>')
      , uncheckedCheckbox = parse('<input type="checkbox">')
      , checkedRadio = parse('<input type="radio" checked>')
      , uncheckedRadio = parse('<input type="radio">')

    it('throws when the element is not an radio or checkbox', function() {
      (function() {
        span.should.be.checked
      }).should.throw('span is not a checkbox or radio input')

      ;(function() {
        input.should.be.checked
      }).should.throw('input is not a checkbox or radio input')
    })

    it('passes when checked, positive assertion', function() {
      checkedCheckbox.should.be.checked
      checkedRadio.should.be.checked
    })

    it('passes when not checked, negative assertion', function() {
      uncheckedCheckbox.should.not.be.checked
      uncheckedRadio.should.not.be.checked
    })

    it('fails when checked, negative assertion', function() {
      (function() {
        checkedCheckbox.should.not.be.checked
      }).should.throw('expected input[type="checkbox"][checked] to not be checked')

      ;(function() {
        checkedRadio.should.not.be.checked
      }).should.throw('expected input[type="radio"][checked] to not be checked')
    })

    it('fails when unchecked, positive assertion', function() {
      (function() {
        uncheckedCheckbox.should.be.checked
      }).should.throw('expected input[type="checkbox"] to be checked')

      ;(function() {
        uncheckedRadio.should.be.checked
      }).should.throw('expected input[type="radio"] to be checked')
    })
  })
})