如何在moq中調試驗證？

Question

我正在使用爲數據庫調用方法附帶IDatabase類的NPoco。我想驗證進入NPoco Insert方法的對象是否具有正確的數據（以域對象的形式）。

public interface IUnitOfWorkProvider 
    { 
     IUnitOfWork GetUnitOfWork(); 
    } 

    public interface IUnitOfWork : IDisposable 
     { 
      void Commit(); 
      IDatabase Db { get; } 
      void SetOneTimeCommandTimeout(int timeout); 
      void SetGlobalCommandTimeout(int timeout); 
     } 
    public interface IDatabase : IDatabaseQuery 
    { 
     IDbConnection Connection { get; } 
     IDbTransaction Transaction { get; } 

     void AbortTransaction(); 
     void BeginTransaction(); 
     void BeginTransaction(IsolationLevel? isolationLevel); 
     void CompleteTransaction(); 
     IDataParameter CreateParameter(); 
     int Delete(object poco); 
     int Delete<T>(object pocoOrPrimaryKey); 
     int Delete<T>(Sql sql); 
     int Delete<T>(string sql, params object[] args); 
     int Delete(string tableName, string primaryKeyName, object poco); 
     int Delete(string tableName, string primaryKeyName, object poco, object primaryKeyValue); 
     void Dispose(); 
     Transaction GetTransaction(); 
     Transaction GetTransaction(IsolationLevel? isolationLevel); 
     object Insert(object poco); 
     object Insert(string tableName, string primaryKeyName, object poco); 
     object Insert(string tableName, string primaryKeyName, bool autoIncrement, object poco); 
     void Save(object poco); 
     void Save(string tableName, string primaryKeyName, object poco); 
     IDatabase SetTransaction(IDbTransaction tran); 
     int Update(object poco); 
     int Update<T>(Sql sql); 
     int Update(object poco, IEnumerable<string> columns); 
     int Update(object poco, object primaryKeyValue); 
     int Update<T>(string sql, params object[] args); 
     int Update(object poco, object primaryKeyValue, IEnumerable<string> columns); 
     int Update(string tableName, string primaryKeyName, object poco); 
     int Update(string tableName, string primaryKeyName, object poco, IEnumerable<string> columns); 
     int Update(string tableName, string primaryKeyName, object poco, object primaryKeyValue); 
     int Update(string tableName, string primaryKeyName, object poco, object primaryKeyValue, IEnumerable<string> columns); 
    } 

// my test class file 
private IFixture fixture; 
    private Mock<IUnitOfWork> unitOfWork; 
    private MyService myService; 
    private Mock<IDatabase> database; // new based on responses 

    [SetUp] 
     public void Setup() 
     { 
      fixture = new Fixture().Customize(new AutoMoqCustomization()); 
database = fixture.Freeze<Mock<IDatabase>>();// new based on responses 
      unitOfWork = fixture.Freeze<Mock<IUnitOfWork>>(); 
      myService = fixture.CreateAnonymous<MyService>(); 
     } 

     [Test] 
     public MyTest() 
     {  
       // fails 
      unitOfWork.Setup(x => x.Db.Insert(It.IsAny<MyDomainObject>())); 
      myService.CallMyMethod(); 
      unitOfWork.Verify(x => x.Db.Insert(It.IsAny<MyDomainObject>())); 

      // fails 
      unitOfWork.Setup(x => x.Db.Insert(It.IsAny<object>())); 
      myService.CallMyMethod(); 
      unitOfWork.Verify(x => x.Db.Insert(It.IsAny<object>())); 
// fails (this was a try based on responses) 
database.Setup(x => x.Insert(It.IsAny<object>()));  
myService.CallMyMethod();   
database.Verify(x => x.Insert(It.IsAny<object>())); 

      // passes 
      unitOfWork.Setup(x => x.Db.Insert(It.IsAny<object>())); 
      myService.CallMyMethod(); 
      unitOfWork.Verify(); 
     } 

public class MyDomainObject 
{ 
    public void Id {get; set;} 
} 

的代碼被稱爲（我應該觸發驗證）

using (var unitOfWork = unitOfWorkProvider.GetUnitOfWork()) 
      { 
     MyDomainObject myDomain = anotherService.getMyDomain(DateTime.Now, 100); 
     unitOfWork.Db.Insert(myDomain); 

} 

Answer 1

的代碼在你的SUT使用一個IUnitOfWorkProvider生產IUnitOfWork：

using (var unitOfWork = unitOfWorkProvider.GetUnitOfWork()) 
{ 
    MyDomainObject myDomain = anotherService.getMyDomain(DateTime.Now, 100); 
    unitOfWork.Db.Insert(myDomain); 
} 

您當前正試圖模擬的IUnitOfWork實例是其他一些實例。它們不是由此IUnitOfWorkProvider生成的。

假設IUnitOfWorkProvider被注入到您的SUT中，您應該能夠凍結並從那裏開始。像這樣的東西應該工作：

var fixture = new Fixture().Customize(new AutoMoqCustomization()); 
var uowProviderStub = fixture.Freeze<Mock<IUnitOfWorkProvider>>(); 
var uowMock = fixture.CreateAnonymous<Mock<IUnitOfWork>>(); 
var sut = fixture.CreateAnonymous<MyService>(); 

uowProviderStub.Setup(p => p.GetUnitOfWork()).Returns(uowMock.Object); 
uowMock 
    .Setup(x => x.Db.Insert(It.IsAny<MyDomainObject>())) 
    .Verifiable(); 

// etc. 

這就是一個有點麻煩，這是真正的考驗要告訴你的是，Law of Demeter violation不是最好的設計......

Answer 2

你需要讓你的嘲笑電話覈實的

unitOfWork 
    .Setup(x => x.Db.Insert(It.IsAny<MyDomainObject>())) 
    .Verifiable();