我是嘲笑和使用Moq的新手.这是我第一次尝试模拟添加功能.我有mocks设置,它适用于读取功能,但是当我尝试对add方法进行单元测试时,它会将更改保存到db.
如何模拟add方法?
我想我必须模拟我的UnitOfWork类,它有SaveChanges()方法.我想知道如何设置模拟来拦截对SaveChanges()的调用而不是保存到db.
这是我到目前为止的模拟
[SetUp] public void SetUp() { addCount = 0; IEnumerable<Platform> platformlist = new List<Platform>(){ new Platform() { Id = 1,Name = "UnkNown"},new Platform() { Id =2,Name = "Amazon"},new Platform() { Id = 3,Name = "Prime Pantry"} }; var platformData = platformlist.AsQueryable(); var mockPlatformSet = new Mock<DbSet<Platform>>(); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.Provider).Returns(platformData.Provider); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.Expression).Returns(platformData.Expression); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.ElementType).Returns(platformData.ElementType); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.GetEnumerator()).Returns(platformData.GetEnumerator()); mockPlatformSet.Setup(m => m.Add(It.IsAny<Platform>())).Callback(() => addCount++); var mockContext = new Mock<ApplicationDbContext>(){ CallBase = true }; mockContext.Setup(m => m.Platforms).Returns(mockPlatformSet.Object); mockContext.Setup(m => m.Platforms.Add(It.IsAny<Platform>())); mockContext.Setup(m => m.Platforms.Add(It.IsAny<Platform>())).Callback(() => addCount++); unitOfWork = new UnitOfWork(mockContext.Object); platformRepo = new PlatformRepository(mockContext.Object); controller = new PlatformController(platformRepo,unitOfWork); }
public class UnitOfWork : IUnitOfWork { private readonly DbContext _context; private bool _isdisposed = false; public UnitOfWork(DbContext context) { _context = context; } public void SaveChanges() { _context.SaveChanges(); } protected virtual void dispose(bool disposing) { if (!_isdisposed) { if (disposing) { _context.dispose(); } } _isdisposed = true; } public void dispose() { dispose(true); GC.SuppressFinalize(this); } }
更新的问题
我正在尝试单元测试我的PlatformController的Create方法.在这个方法中,我在repostiory上调用Add函数,然后调用UnitOfWork的SaveChanges函数.我想验证我的Platform对象是否被添加到DbSet,但是“拦截”对SaveChanges()的调用,它不会写入db.
我怎样才能做到这一点?
解决方法
当我将mockContext的CallBase值设置为IUnitOfWork为false时,这似乎解决了我的单元测试写入数据库的问题.
这行代码:
mockContext.As< IUnitOfWork>().CallBase = false;
[SetUp] public void SetUp() { addCount = 0; IEnumerable<Platform> platformlist = new List<Platform>(){ new Platform() { Id = 1,Name = "Prime Pantry"} }; var platformData = platformlist.AsQueryable(); var mockPlatformSet = new Mock<DbSet<Platform>>(); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.Provider).Returns(platformData.Provider); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.Expression).Returns(platformData.Expression); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.ElementType).Returns(platformData.ElementType); mockPlatformSet.As<IQueryable<Platform>>().Setup(m => m.GetEnumerator()).Returns(platformData.GetEnumerator()); mockPlatformSet.Setup(m => m.Add(It.IsAny<Platform>())).Callback(() => addCount++); var mockContext = new Mock<ApplicationDbContext>(){ CallBase = true }; mockContext.Setup(m => m.Platforms).Returns(mockPlatformSet.Object); mockContext.Setup(m => m.Platforms.Add(It.IsAny<Platform>())); mockContext.Setup(m => m.Platforms.Add(It.IsAny<Platform>())).Callback(() => addCount++); mockContext.Setup(m => m.Set<Platform>()).Returns(mockPlatformSet.Object); mockContext.As<IUnitOfWork>().CallBase = false; unitOfWork = new UnitOfWork(mockContext.Object); platformRepo = new PlatformRepository(mockContext.Object); controller = new PlatformController(platformRepo,unitOfWork); }
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