angular.js/test/ng/directive/aSpec.js
Karl Seamon f3de5b6eac perf(a): do not link when href or name exists in template
Change the a directive to link and hookup a click event only when
there is no href or name in the template element.
In a large Google app, this results in about 800 fewer registrations,
saving a small but measurable amount of time and memory.

Closes #5362
2013-12-13 00:31:25 -08:00

87 lines
2.1 KiB
JavaScript

'use strict';
describe('a', function() {
var element, $compile, $rootScope;
beforeEach(inject(function(_$compile_, _$rootScope_) {
$compile = _$compile_;
$rootScope = _$rootScope_;
}));
afterEach(function(){
dealoc(element);
});
it('should prevent default action to be executed when href is empty', function() {
var orgLocation = document.location.href,
preventDefaultCalled = false,
event;
element = $compile('<a href="">empty link</a>')($rootScope);
if (msie < 9) {
event = document.createEventObject();
expect(event.returnValue).not.toBeDefined();
element[0].fireEvent('onclick', event);
expect(event.returnValue).toEqual(false);
} else {
event = document.createEvent('MouseEvent');
event.initMouseEvent(
'click', true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
event.preventDefaultOrg = event.preventDefault;
event.preventDefault = function() {
preventDefaultCalled = true;
if (this.preventDefaultOrg) this.preventDefaultOrg();
};
element[0].dispatchEvent(event);
expect(preventDefaultCalled).toEqual(true);
}
expect(document.location.href).toEqual(orgLocation);
});
it('should prevent IE for changing text content when setting attribute', function() {
// see issue #1949
element = jqLite('<a href="">hello@you</a>');
$compile(element);
element.attr('href', 'bye@me');
expect(element.text()).toBe('hello@you');
});
it('should not link and hookup an event if href is present at compile', function() {
var jq = jQuery || jqLite;
element = jq('<a href="//a.com">hello@you</a>');
var linker = $compile(element);
spyOn(jq.prototype, 'on');
linker($rootScope);
expect(jq.prototype.on).not.toHaveBeenCalled();
});
it('should not link and hookup an event if name is present at compile', function() {
var jq = jQuery || jqLite;
element = jq('<a name="bobby">hello@you</a>');
var linker = $compile(element);
spyOn(jq.prototype, 'on');
linker($rootScope);
expect(jq.prototype.on).not.toHaveBeenCalled();
});
});