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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
我遇到问题单元测试以下方法:
$scope.changeLocation = function (url) {
$location.path(url).search({ ref: "outline" });
};
我编写了以下单元测试,当前因此错误而失败(TypeError:无法读取未定义的属性'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);
});
如果我将我的功能更改为以下内容,则测试通过:
$scope.changeLocation = function (url) {
$location.path(url);
$location.search({ ref: "outline" });
};
当我使用方法链时,如何对此方法进行单元测试? 我需要以不同方式设置$ locationMock吗? 对于我的生活,我无法弄清楚这一点。
那是因为你的mock不会返回位置对象以便能够链接。 使用Jasmine 2.0,您可以将模拟更改为:
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
或者只是创建一个间谍对象(更少的代码):
var $locationMock = jasmine.createSpyObj('locationMock', ['path', 'search']);
和
$locationMock.path.and.returnValue($locationMock);
$locationMock.search.and.returnValue($locationMock); //if you are chaining from search
尝试:
spyOn($locationMock, "path").and.callThrough();
否则你会在模拟非$位置上调用搜索
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