xUnit 测试和 .NET Core 2.0 中的 Automapper [英] Automapper in xUnit testing and .NET Core 2.0

问题描述

我有 .NET Core 2.0 项目，其中包含存储库模式和 xUnit 测试.

现在，这是其中的一些代码.

控制器:

公共类 SchedulesController : 控制器{私有只读 IScheduleRepository 存储库；私有只读 IMapper 映射器；公共调度控制器(IScheduleRepository 存储库，IMapper 映射器){this.repository = 存储库；this.mapper = 映射器；}[HttpGet]公共 IActionResult Get(){var result = mapper.Map, IEnumerable>(来源:repository.items)；返回新的 OkObjectResult(result);}}

我的测试班:

公共类 SchedulesControllerTests{[事实]公共无效 CanGet(){尝试{//安排模拟<IScheduleRepository>mockRepo = new Mock();mockRepo.Setup(m => m.items).Returns(new Schedule[]{new Schedule() { Id=1, Title = "Schedule1" },new Schedule() { Id=2, Title = "Schedule2" },new Schedule() { Id=3, Title = "Schedule3" }});var mockMapper = new Mock();mockMapper.Setup(x => x.Map(It.IsAny())).Returns((ScheduleDto source) => new Schedule() { Title = source.Title });SchedulesController 控制器 = new SchedulesController(repository: mockRepo.Object, mapper: mockMapper.Object);//行为var 结果 = controller.Get();//断言var okResult = 结果为 OkObjectResult;Assert.NotNull(okResult);var model = okResult.Value as IEnumerable;断言.NotNull(模型);}捕获(异常前){//断言Assert.False(false, ex.Message);}}}

我面临的问题.

我的问题是，当我使用数据库上下文运行此代码并执行 Get() 方法时，它工作正常，它给出了所有结果.

但是当我尝试运行测试用例时，它没有返回 Dto 对象的任何数据.当我调试时我发现

1. 我正在使用 mockRepo 在控制器中获取我的测试对象.<​​/p>

2. 但看起来自动映射器没有正确初始化，因为在映射时它没有返回任何东西

   var result = mapper.Map, IEnumerable>(来源:repository.items)；

到目前为止我尝试了什么?

我遵循了所有这些答案，但仍然无法正常工作.

在单元测试中模拟 Mapper.Map()

如何使用 AutoMapper 模拟列表转换

因此，我需要精通 xUnit 和 automapper 的人的帮助，并且需要有关如何正确初始化模拟 Mapper 的指导.

解决方案

终于对我有用了，我按照这个方法如何为使用 AutoMapper 和依赖注入的 .net core 2.0 服务编写 xUnit 测试?

我在这里发布我的答案和测试课程，以便其他 SO 可以在需要时使用.

公共类 SchedulesControllerTests{[事实]公共无效 CanGet(){尝试{//安排//存储库模拟<IScheduleRepository>mockRepo = new Mock();var schedules = new List(){new Schedule() { Id=1, Title = "Schedule1" },new Schedule() { Id=2, Title = "Schedule2" },new Schedule() { Id=3, Title = "Schedule3" }};mockRepo.Setup(m => m.items).Returns(value: schedules);//自动映射器配置var mockMapper = new MapperConfiguration(cfg =>{cfg.AddProfile(new AutoMapperProfile());});var mapper = mockMapper.CreateMapper();SchedulesController 控制器 = new SchedulesController(repository: mockRepo.Object, mapper: mapper);//行为var 结果 = controller.Get();//断言var okResult = 结果为 OkObjectResult;如果 (okResult != null)Assert.NotNull(okResult);var model = okResult.Value as IEnumerable;如果 (model.Count() > 0){断言.NotNull(模型);var expected = model?.FirstOrDefault().Title;var actual = schedules?.FirstOrDefault().Title;Assert.Equal(预期:预期，实际:实际)；}}捕获(异常前){//断言Assert.False(false, ex.Message);}}}

I have .NET Core 2.0 Project which contains Repository pattern and xUnit testing.

Now, here is some of it's code.

Controller:

public class SchedulesController : Controller
{
    private readonly IScheduleRepository repository;
    private readonly IMapper mapper;

    public SchedulesController(IScheduleRepository repository, IMapper mapper)
    {
        this.repository = repository;
        this.mapper = mapper;
    }

    [HttpGet]
    public IActionResult Get()
    {
        var result = mapper.Map<IEnumerable<Schedule>, IEnumerable<ScheduleDto>>(source: repository.items);
        return new OkObjectResult(result);
    }
}

My Test Class:

public class SchedulesControllerTests
{
    [Fact]
    public void CanGet()
    {
        try
        {
            //Arrange
            Mock<IScheduleRepository> mockRepo = new Mock<IScheduleRepository>();
            mockRepo.Setup(m => m.items).Returns(new Schedule[]
            {
                new Schedule() { Id=1, Title = "Schedule1" },
                new Schedule() { Id=2, Title = "Schedule2" },
                new Schedule() { Id=3, Title = "Schedule3" }
            });

            var mockMapper = new Mock<IMapper>();
            mockMapper.Setup(x => x.Map<Schedule>(It.IsAny<ScheduleDto>()))
                .Returns((ScheduleDto source) => new Schedule() { Title = source.Title });

            SchedulesController controller = new SchedulesController(repository: mockRepo.Object, mapper: mockMapper.Object);

            //Act
            var result = controller.Get();

            //Assert
            var okResult = result as OkObjectResult;
            Assert.NotNull(okResult);

            var model = okResult.Value as IEnumerable<ScheduleDto>;
            Assert.NotNull(model);

        }
        catch (Exception ex)
        {
            //Assert
            Assert.False(false, ex.Message);
        }
    }
}

Issue I Am facing.

My Issue is that when I run this code with database context and execute Get() method, it works fine, it gives me all results.

But when I tries to run test case, it's not returning any data of Dto object. When I debugged I found that

1. I am getting my test object in controller using mockRepo.

2. But it looks like Auto mapper is not initialized correctly, because while mapping it's not returning anything in

   var result = mapper.Map<IEnumerable<Schedule>, IEnumerable<ScheduleDto>>(source: repository.items);

What I tried So Far?

I followed all this answers but still it's not working.

Mocking Mapper.Map() in Unit Testing

How to Mock a list transformation using AutoMapper

So, I need help from someone who is good in xUnit and automapper, and need guidance on how to initialize mock Mapper correctly.

解决方案

Finally it worked for me, I followed this way How to Write xUnit Test for .net core 2.0 Service that uses AutoMapper and Dependency Injection?

Here I am posting my answer and Test Class so if needed other SO's can use.

public class SchedulesControllerTests
{
    [Fact]
    public void CanGet()
    {
        try
        {
            //Arrange
            //Repository
            Mock<IScheduleRepository> mockRepo = new Mock<IScheduleRepository>();
            var schedules = new List<Schedule>(){
                new Schedule() { Id=1, Title = "Schedule1" },
                new Schedule() { Id=2, Title = "Schedule2" },
                new Schedule() { Id=3, Title = "Schedule3" }
            };

            mockRepo.Setup(m => m.items).Returns(value: schedules);

            //auto mapper configuration
            var mockMapper = new MapperConfiguration(cfg =>
            {
                cfg.AddProfile(new AutoMapperProfile());
            });
            var mapper = mockMapper.CreateMapper();

            SchedulesController controller = new SchedulesController(repository: mockRepo.Object, mapper: mapper);

            //Act
            var result = controller.Get();

            //Assert
            var okResult = result as OkObjectResult;
            if (okResult != null)
                Assert.NotNull(okResult);

            var model = okResult.Value as IEnumerable<ScheduleDto>;
            if (model.Count() > 0)
            {
                Assert.NotNull(model);

                var expected = model?.FirstOrDefault().Title;
                var actual = schedules?.FirstOrDefault().Title;

                Assert.Equal(expected: expected, actual: actual);
            }
        }
        catch (Exception ex)
        {
            //Assert
            Assert.False(false, ex.Message);
        }
    }
}

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