angularjs - 创建单元测试，其中每个测试都有其特定的测试数据和测试模拟

Question

我有这个测试结构并且它正在工作，但是当我在这个单元测试 .js 文件中放置更多测试时，它不能满足我的要求，但是所有相关的测试都应该去那里。

工作 :

'use strict';
describe('lessonplannerFactory unit tests', function () {

    // load the service's module
    // beforeEach(module('clientApp'));

    // Arrange
    var dateFactory = {
        getVisibleDateRange: function (startDate, endDate, visibleWeekDays) {
            // I do not care about the parameters, I just want to stub out the visible days with 2 stubs
            var days = [ moment(new Date(2014, 0, 1)), moment(new Date(2014, 0, 2))];
            return days;
        }
    };

    // load the service's module
    beforeEach(module('clientApp', function ($provide) {
        $provide.value('dateFactory', dateFactory);
    }));

    // Arrange
    var lessonPlannerFactory;
    beforeEach(inject(function (_lessonPlannerFactory_) {  // The underscores before/after the factory are removed by the $injector
        lessonPlannerFactory = _lessonPlannerFactory_;
    }));

    it('creates periods by a daily rotation of n according to a given timetable for a certain timespan', inject(function (_dailyPeriodsTestDataFactory_) {

        // Arrange
        var testCases = _dailyPeriodsTestDataFactory_.testCases;  // specific test data

        // Act
        // Do something with the injected lessonPlannerFactory.method1(testCases[0],..);

        // Assert

    }));
});

我想要的是用我自己的话或伪代码描述的:

describe("lesson planner factory unit tests")
{

   // Inject a lesson planner factory instance for each test

test1(_specificTestData1_)
{
    // Arrange
    var data = _specificTestData1_;

    var stub1 = { } // setup specific stub

    inject this specific stub into this test with $provide.value = mock // This stub is used INSIDE the method1 to stub out a factory dependency

    // Act
    var result = lessonPlannerFactory.method1(data,..);

    // Assert

}

test2(_specificTestData2_)
{
    // Arrange
    var data = _specificTestData2_;

    var stub2 = { } // setup specific stub

    inject this specific stub into this test with $provide.value = mock // This stub is used INSIDE the method2 to stub out a factory dependency

    // Act
    var result = lessonPlannerFactory.method2(data,..);

    // Assert

}

}

这是我尝试过的，但它不起作用。

我假设在测试中此时将 stub 分配给 $provide.value 为时已晚，因为之前注入(inject)/创建了类(class)计划工厂，并且类(class)计划工厂具有真正的 stub 对象作为依赖项。只是看看:

'use strict';
describe('lessonplannerFactory unit tests', function () {

    // load the service's module
    beforeEach(module('clientApp'));

    // Arrange
    var lessonPlannerFactory;
    beforeEach(inject(function (_lessonPlannerFactory_) {  // The underscores before/after the factory are removed by the $injector
        lessonPlannerFactory = _lessonPlannerFactory_;
    }));

    it('creates periods by a daily rotation of n according to a given timetable for a certain timespan', inject(function (_dailyPeriodsTestDataFactory_) {

        // Arrange
        var testCases = _dailyPeriodsTestDataFactory_.testCases;  // specific test data

        // specific test stub
        var dateFactory = {
            getVisibleDateRange: function (startDate, endDate, visibleWeekDays) {
                // I do not care about the parameters, I just want to stub out the visible days with 2 stubs
                var days = [ moment(new Date(2014, 0, 1)), moment(new Date(2014, 0, 2))];
                return days;
            }
        };

        // load the stub
        module('clientApp', function ($provide) {
            $provide.value('dateFactory', dateFactory);
        });

        // Act          on the testcases in a for loop
        var result = lessonPlannerFactory.createPeriodsDaily(testCases[i].data1,..);

        // Assert
    }));
});

这就是我得到的错误:

TypeError: Cannot read property 'running' of undefined
    at isSpecRunning (http://localhost:3000/base/app/bower_components/angular-mocks/angular-mocks.js:1924:65)

那么，我怎样才能为服务依赖注入(inject)一个 stub 而不是在 beforeEach 方法中，而是在单元测试本身内部，因为我需要一个特定的 stub !？

Answer 1

帕斯卡，我仍然不明白为什么嵌套描述对你不起作用。也许我只是没有得到你的要求？

describe('overall test of A', function() {
    describe('first test of A', function() {
        beforeEach(function() {
            // arrange
        });

        it('should do X', function() {
            // test
            // assert
        });
    });
    describe('second test of A', function() {
        beforeEach(function() {
            // arrange
        });

        it('should do Y', function() {
            // test
            // assert
        });
    });
});