角度测试:窥探在控制器初始化时执行的函数 [英] Angular Testing: Spy a function that was executed on the initialize of a controller
问题描述
我一直试图窥探在控制器初始化时执行的函数,但测试总是失败。
我一直在尝试执行 $ scope。$ digest()
并且这不起作用,但在控制台中,我看到该函数已被调用。
I've been trying to spy a function that was executed on the initialize of a controller, but the test always failed.
I've been trying execute $scope.$digest()
and this it's not working, However in the console, i see that the function have been called.
我无法弄清楚这一点,有人可以向我解释为什么这不起作用?
I can't figure out this, Someone can explain to me why this it's not working?
Codepen示例:
http://codepen.io/gpincheiraa/pen/KzZNby
Codepen Example: http://codepen.io/gpincheiraa/pen/KzZNby
控制器
function Controller($stateParams, $scope){
$scope.requestAuthorization = requestAuthorization;
if ($stateParams.requestAuthorization === true) {
console.log('$stateParams.requestAuthorization');
$scope.requestAuthorization();
}
function requestAuthorization() {
console.log('requestAuthorization()');
}
}
测试
describe('AppCtrl', function(){
var AppCtrl, $rootScope, $scope, $stateParams;
beforeEach(module('exampleApp'));
beforeEach(inject(function($controller, _$rootScope_, _$injector_, _$stateParams_) {
$rootScope = _$rootScope_;
$scope = $rootScope.$new();
$stateParams = _$stateParams_;
$stateParams.requestAuthorization = true;
AppCtrl = $controller('AppCtrl',{
$scope: $scope,
$stateParams : $stateParams
});
spyOn($scope, 'requestAuthorization');
}));
it('$stateParams.requestAuthorization should be defined', function() {
expect($stateParams.requestAuthorization).toBeDefined();
});
it('$scope.requestAuthorization should be defined', function() {
expect($scope.requestAuthorization).toBeDefined();
});
// this test is not passing..
it('should call requestAuthorization', function() {
//$scope.$digest();
expect($scope.requestAuthorization).toHaveBeenCalled();
});
});
推荐答案
您的测试失败,因为间谍被实际功能覆盖当控制器初始化时。避免这种情况的一种方法是使用 requestAuthorization
属性的自定义setter进行猴子修补 $ scope
对象,这可能会创建间谍时控制器正在尝试为此属性赋值:
Your test is failing because spy gets overridden by real function when controller initializes. One way to avoid this is monkey-patching $scope
object with custom setter for requestAuthorization
property, that could create spy when controller is trying to assign value to this property:
beforeEach(inject(function($controller, _$rootScope_, _$injector_, _$stateParams_) {
$rootScope = _$rootScope_;
$scope = $rootScope.$new();
var reqAuthSpy;
Object.defineProperty($scope, 'requestAuthorization', {
get: function() {return reqAuthSpy;},
set: function(fn) {
reqAuthSpy = jasmine.createSpy('reqAuthSpy');
}
});
$stateParams = _$stateParams_;
$stateParams.requestAuthorization = true;
AppCtrl = $controller('AppCtrl',{
$scope: $scope,
$stateParams : $stateParams
});
}));
这篇关于角度测试:窥探在控制器初始化时执行的函数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!