我有一个angularjs指令为方向更改事件创建一个事件处理程序,以便在方向更改为横向时添加类名(它仍然需要改进,所以现在请耐心等待):
angular.module('myApp')
.directive('orientationHandler', function ($rootScope, $timeout, $window) {
return function(scope, element, attrs) {
var className = 'mobile_landscape';
var mediaQuery = 'only screen and (max-width: 768px) and (orientation: landscape)';
var orientationCheck = function() {
if ($window.matchMedia(mediaQuery).matches) {
element.addClass(className);
$rootScope.$broadcast('Orientation.change', 'landscape');
} else {
element.removeClass(className);
$rootScope.$broadcast('Orientation.change', 'portrait');
}
};
$window.addEventListener('orientationchange', function() {
$timeout(orientationCheck, 100);
$timeout(orientationCheck, 200);
},
false
);
$rootScope.$on('$viewContentLoaded', function() {
$timeout(orientationCheck, 100);
$timeout(orientationCheck, 200);
});
};
});
现在我想测试茉莉花这样一个指令:
//TODO: Find a way to test orientation change events
describe('Directive: orientationHandler', function () {
// load the directive's module
beforeEach(module('myApp'));
var element,
scope,
$window;
beforeEach(inject(function ($rootScope, $compile, $httpBackend, _$window_) {
$window = _$window_;
scope = $rootScope.$new();
element = angular.element('<div orientation-handler></div>');
element = $compile(element)(scope);
$httpBackend.whenGET(/.*/).respond(200);
}));
it('should broadcast an event when changed the orientation', function () {
var message;
scope.$on('Orientation.change', function(event, value) {
message = value;
});
angular.element($window).trigger('orientationchange');
scope.$apply();
expect(message).toBeDefined();
expect(angular.isString(message)).toBe(true);
});
});
那么,有没有办法以编程方式触发方向更改事件,或以某种方式模拟它以测试绑定事件处理程序?
谢谢!
答案 0 :(得分:1)
几点:
我会使用以下方法检查方向类型:
$window.screen.orientation.type
无需运行媒体查询。
我使用以下内容在我的测试中触发事件:
function dispatchOrientationChangeEvent() {
var evt, orientationEventType = 'orientationchange';
evt = $window.document.createEvent('HTMLEvents');
evt.initEvent(orientationEventType, true, true);
$window.dispatchEvent(evt);
}