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test.js
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test.js
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var classList = require('.');
describe('classList(el)', function () {
var el;
beforeEach(function(){
el = document.createElement('div');
});
it('should throw when the argument is not a DOM element', function () {
expect(classList.bind(null)).toThrow();
expect(classList.bind(null, 'str')).toThrow();
});
/**
* .add()
*/
describe('.add(string)', function () {
it('should add a class', function () {
classList(el).add('foo');
expect(el.className).toBe('foo');
});
it('should not add the same class twice', function(){
var list = classList(el);
list.add('foo');
list.add('foo');
list.add('bar');
expect(el.className).toBe('foo bar');
});
});
/**
* .remove()
*/
describe('.remove(string)', function(){
it('should remove a class from the beginning', function(){
el.className = 'foo bar baz';
classList(el).remove('foo');
expect(el.className).toBe('bar baz');
});
it('should remove a class from the middle', function(){
el.className = 'foo bar baz';
classList(el).remove('bar');
expect(el.className).toBe('foo baz');
});
it('should remove a class from the end', function(){
el.className = 'foo bar baz';
classList(el).remove('baz');
expect(el.className).toBe('foo bar');
});
});
/**
* .toggle()
*/
describe('.toggle(string)', function(){
it('should remove the class if present', function(){
el.className = 'foo bar hidden';
classList(el).toggle('hidden');
expect(el.className).toBe('foo bar');
});
it('should add the class if not present', function(){
el.className = 'foo bar';
classList(el).toggle('hidden');
expect(el.className).toBe('foo bar hidden');
});
});
describe('.toggle(string, force)', function(){
describe('when force is true', function(){
it('should add the class if missing', function(){
el.className = 'foo bar';
classList(el).toggle('hidden', true);
expect(el.className).toBe('foo bar hidden');
});
it('should not remove the class if present', function(){
el.className = 'foo bar hidden';
classList(el).toggle('hidden', true);
expect(el.className).toBe('foo bar hidden');
});
});
describe('when force is false', function(){
it('should remove the class if present', function(){
el.className = 'foo bar hidden';
classList(el).toggle('hidden', false);
expect(el.className).toBe('foo bar');
});
it('should not add the class if missing', function(){
el.className = 'foo bar';
classList(el).toggle('hidden', false);
expect(el.className).toBe('foo bar');
});
});
});
/**
* .contains()
*/
describe('.contains(string)', function(){
it('should check if the class is present', function(){
el.className = 'foo bar';
var list = classList(el);
expect(list.contains('foo')).toBe(true);
expect(list.contains('bar')).toBe(true);
expect(list.contains('baz')).toBe(false);
});
});
});