在angularjs中,service是單例的,通常用來與後臺交互數據,需要數據的組件只需要注入某個service即可,service的典型例子:
app.factory(‘EventService’, [‘
function(
return {
getEvents: function() {
var deferred =
deferred.resolve(result);
}).error(function(result) {
deferred.reject(result);
});
return deferred.promise;
}
};
}]);
對於
it(‘should have settings from http request’, function() {
var result;
var expected = {
“period”: “day”,
“date”: “2015-3-23”,
};
//setup
httpBackend.expectGET(‘/XXX.json’).respond(expected);
var promise = settingService.setting();
promise.then(function(data) {
result = data;
});
httpBackend.flush();
expect(result).toEqual(expected);
});
當然 使用
beforeEach(function() {
module(‘services’);
inject(function(SearchSettingService, httpBackend) {
settingService = SearchSettingService;
httpBackend = $httpBackend;
});
}); httpBackend提供了很多方便測試的方法,並且很好地支持REST。
httpBackend.expectGET(url).respond(data);
httpBackend.expectPOST(url, param).respond(data);
httpBackend.expectJSONP(url).respond(data);
還有其他的方法請自行查詢。
還需要解釋的是:httpBackend.flush(); 當執行這行代碼時,angular會調用這個setup(發送請求並攔截該請求),並將返回指定的數據。
在前面的文章裏面我們介紹了Moco(http://hcc0926.blog.51cto.com/172833/1619706), 也可以通過Moco進行打樁測試,配置很簡單。
參考鏈接:
http://www.smashingmagazine.com/2014/10/07/introduction-to-unit-testing-in-angularjs/
http://fdietz.github.io/recipes-with-angular-js/consuming-external-services/testing-services.html
http://andyshora.com/unit-testing-best-practices-angularjs.html
http://nathanleclaire.com/blog/2014/04/12/unit-testing-services-in-angularjs-for-fun-and-for-profit/
http://icodeit.org/2014/01/how-to-test-service-in-angularjs/