QUnit Classes assertion plugin

A set of assertions for checking thats an element has ( or does not have ) any number of classes. The check is order independent and gives a diff of the expected classes. Accepts either a single Dom node or a jQuery object containing exactly one element.

NOTE: While this accepts jQuery objects it has no dependency on jQuery

Usage

assert.hasClasses( element, classes [, message] );
assert.lacksClasses( element, classes [, message] );

assert.hasClassesStrict( element, classes [, message] );

assert.hasClassRegex( element, RexExp [, message] );
assert.lacksClassRegex( element, RexExp [, message] );

assert.hasClassStart( element, start [, message] );
assert.lacksClassStart( element, start [, message] );

assert.hasClassPartial( element, partial [, message] );
assert.lacksClassPartial( element, partial [, message] );

assert.lacksAllClasses( element [, message] );
assert.hasSomeClass( element [, message] );

Where:

• element: a jQuery object or DOM Element ( must be a single element, collections not allowed )
• classes: a space seperated string of classes
• message: a custom message to replace default message of "Element must (not) have classes"
• RegExp: a valid regular expression to be used to match against individual class names
• start: a string that should match the begining of any class
• partial: a string of a partial class name that should be matched against any of the classes

Examples

Example 1: hasClasses with DOM Element

<div class="class1 class2"></div>

QUnit.test('Example hasClasses unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasClasses( element, "class1 class2" ); // Passes
  assert.hasClasses( element, "class3", "custom message" ); // Fails
});

Example 2: lacksClasses with jQuery object

<div class="class1 class2"></div>

QUnit.test('Example lacksClasses unit test', function( assert ) {
  var element = $( "#test" );

  assert.lacksClasses( element, "missing-class" ); // Passes
  assert.lacksClasses( element, "class1 missing-class-2", "custom message" ); // Fails
});

Example 3: hasClassesStrict

<div class="class1 class2"></div>

QUnit.test('Example hasClassesStrict unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasClassesStrict( element, "class1 class2" ); // Passes
  assert.hasClassesStrict( element, "class1", "custom message" ); // Fails
});

Example 4: hasClassRegex

<div class="class1 class2"></div>

QUnit.test('Example hasClassesRegex unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasClassRegex( element, /^(clas)([a-z]){1}([0-9])$/ ); // Passes

  // Fails this only matches against individual classes
  assert.hasClassRegex( element, /^(([a-z]){5}([0-9]|[0-9]\s)){2}$/, "custom message" );
});

Example 5: lacksClassRegex

<div class="class1 class2"></div>

QUnit.test('Example hasClassesRegex unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.lacksClassRegex( element, /boom/ ); // Passes
  assert.lacksClassRegex( element, /^(class)/, "custom message" ); // Fails
});

Example 6: hasClassStart

<div class="class1 class2"></div>

QUnit.test('Example hasClassStart unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasClassStart( element, "cla" ); // Passes
  assert.hasClassStart( element, "lass", "custom message" ); // Fails
});

Example 7: lacksClassStart

<div class="class1 class2"></div>

QUnit.test('Example lacksClassStart unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.lacksClassStart( element, "foo" ); // Passes
  assert.lacksClassStart( element, "cla", "custom message" ); // Fails
});

Example 8: hasClassPartial

<div class="class1 class2"></div>

QUnit.test('Example hasClassPartial unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasClassPartial( element, "lass" ); // Passes
  assert.hasClassPartial( element, "foo", "custom message" ); // Fails
});

Example 9: lacksClassPartial

<div class="class1 class2"></div>

QUnit.test('Example lacksClassStart unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.lacksClassPartial( element, "foo" ); // Passes
  assert.lacksClassPartial( element, "lass", "custom message" ); // Fails
});

Example 10: lacksAllClasses - checks to make sure an element contains no classes

<div class=""></div>

QUnit.test('Example lacksAllClasses unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.lacksAllClasses( element ); // Passes
  assert.lacksAllClasses( element, "custom message" ); // Fails
});

Example 10: hasSomeClass - checks to make sure an element has some class does not matter what

<div class="class1 class2"></div>

QUnit.test('Example hasSomeClass unit test', function( assert ) {
  var element = document.getElementById( "test" );

  assert.hasSomeClass( element ); // Passes
  assert.hasSomeClass( element, "custom message" ); // Fails
});