无法让Moq返回值

Question

我正在使用Moq对我们使用Entity Framework的一些代码进行单元测试.在我的单元测试中,我有以下代码,但是当我测试它时,我无法获得正确的返回值(一切编译好,但计数结果为0,返回null).这告诉我,我的Entity对象从未添加到我的模拟仓库中.

[TestMethod]
public void GetEntity_ValidName_EntityReturned()
{
    Entity testEntity = new Entity();
    testEntity.Name = "Test";

    var mockService = new Mock<IUnitOfWork>();
    mockService.Setup(mock => mock.EntityRepo.Add(testEntity));
    IUnitOfWork testDB = mockService.Object;
    testDB.EntityRepo.Add(testEntity);

    Entity testEntity2 = EntityHelper.getEntity(testDB,testEntity.Name);
    int count = testDB.EntityRepo.Count();

    Assert.AreEqual(testEntity.Name,testEntity2.Name);
}

如何添加实体？我还需要吗？我也尝试了以下无法编译:

mockService.Setup(mock => mock.EntityRepo.Add(testEntity)).Returns(testEntity);

同上:

mockService.SetupGet(mock => mock.EntityRepo.Add(testEntity)).Returns(testEntity);

编辑:这是测试的目标:

public static Entity getEntity(IUnitOfWork database, string entityName)
{
    Entity _entity = database.EntityRepo.Find(x => x.Name.ToLower().Trim() == entityName).FirstOrDefault();
    return _entity;
}

Answer 1

这是您需要模拟的命令:

database.EntityRepo.Find

你不必担心嘲笑服务,只需要IUnitOfWork 像:

testDB.Setup(m => m.Find(It.IsAny<object[]>())).Returns(new List<Entity>() entity);

工作示例:

由于双点睛的,我们需要挂一个模拟断IUnitOfWork供EntityRepo

[TestMethod]
public void GetEntity_ValidName_EntityReturned()
{
    Entity testEntity = new Entity();
    testEntity.Name = "Test";

    var mockEntityRepo = new Mock<IRepo>(); // Type of Repo here
    var mockService = new Mock<IUnitOfWork>();
    mockService.Setup(m => m.EntityRepo).Returns(mockEntityRepo.Object);

    mockEntityRepo.Setup(m => m.Find(It.IsAny<Expression<Func<Entity, bool>>>())).Returns(testEntity);

    Entity testEntity2 = EntityHelper.getEntity(mockService.Object, testEntity.Name);
    int count = testDB.EntityRepo.Count();

    Assert.AreEqual(testEntity.Name,testEntity2.Name);
}

模拟设置应该对应于被测试方法中的调用.