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[英]How to unit test with Jasmine on multiple chained functions with returns?
[英]How to unit test a chained method using Jasmine
我遇到問題單元測試以下方法:
$scope.changeLocation = function (url) {
$location.path(url).search({ ref: "outline" });
};
我編寫了以下單元測試,當前因此錯誤而失敗(TypeError:無法讀取未定義的屬性'search'):
var $locationMock = { path: function () { }, search: function () { } };
it('changeLocation should update location correctly', function () {
$controllerConstructor('CourseOutlineCtrl', { $scope: $scope, $location: $locationMock });
var url = "/url/";
spyOn($locationMock, "path");
spyOn($locationMock, "search");
$scope.changeLocation(url);
expect($locationMock.search).toHaveBeenCalledWith({ ref: "outline" });
expect($locationMock.path).toHaveBeenCalledWith(url);
});
如果我將我的功能更改為以下內容,則測試通過:
$scope.changeLocation = function (url) {
$location.path(url);
$location.search({ ref: "outline" });
};
當我使用方法鏈時,如何對此方法進行單元測試? 我需要以不同方式設置$ locationMock嗎? 對於我的生活,我無法弄清楚這一點。
那是因為你的mock不會返回位置對象以便能夠鏈接。 使用Jasmine 2.0,您可以將模擬更改為:
var $locationMock = { path: function () { return $locationMock; },
search: function () { return $locationMock; } };
和
spyOn($locationMock, "path").and.callThrough();
spyOn($locationMock, "search").and.callThrough(); //if you are chaining from search
或添加:
spyOn($locationMock, "path").and.returnValue($locationMock);
spyOn($locationMock, "search").and.returnValue($locationMock); //if you are chaining from search
或者只是創建一個間諜對象(更少的代碼):
var $locationMock = jasmine.createSpyObj('locationMock', ['path', 'search']);
和
$locationMock.path.and.returnValue($locationMock);
$locationMock.search.and.returnValue($locationMock); //if you are chaining from search
嘗試:
spyOn($locationMock, "path").and.callThrough();
否則你會在模擬非$位置上調用搜索
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