.NET NUnit 测试 - Assembly.GetEntryAssembly() 为 null

Question

当使用 Assembly.GetEntryAssembly() 的类在单元测试中运行时，Assembly.GetEntryAssembly() 为 null。

在单元测试期间是否有一些选项如何定义 Assembly.GetEntryAssembly() ？

Answer 1

中给出的 SetEntryAssembly(Assembly assembly) 方法

实现http:// /frostwave.googlecode.com/svn-history/r75/trunk/F2DUnitTests/Code/AssemblyUtilities.cs

到您的单元测试项目。

         /// <summary>
        /// Use as first line in ad hoc tests (needed by XNA specifically)
        /// </summary>
        public static void SetEntryAssembly()
        {
            SetEntryAssembly(Assembly.GetCallingAssembly());
        }

        /// <summary>
        /// Allows setting the Entry Assembly when needed. 
        /// Use AssemblyUtilities.SetEntryAssembly() as first line in XNA ad hoc tests
        /// </summary>
        /// <param name="assembly">Assembly to set as entry assembly</param>
        public static void SetEntryAssembly(Assembly assembly)
        {
            AppDomainManager manager = new AppDomainManager();
            FieldInfo entryAssemblyfield = manager.GetType().GetField("m_entryAssembly", BindingFlags.Instance | BindingFlags.NonPublic);
            entryAssemblyfield.SetValue(manager, assembly);

            AppDomain domain = AppDomain.CurrentDomain;
            FieldInfo domainManagerField = domain.GetType().GetField("_domainManager", BindingFlags.Instance | BindingFlags.NonPublic);
            domainManagerField.SetValue(domain, manager);
        }

Answer 2

您可以使用 Rhino Mocks 执行类似的操作：将 Assembly.GetEntryAssembly() 调用封装到具有接口 IAssemblyLoader 的类中，并将其注入到您正在测试的课程。这尚未经过测试，但大致如下：

[Test] public void TestSomething() {
  // arrange
  var stubbedAssemblyLoader = MockRepository.GenerateStub<IAssemblyLoader>();
  stubbedAssemblyLoader.Stub(x => x.GetEntryAssembly()).Return(Assembly.LoadFrom("assemblyFile"));

  // act      
  var myClassUnderTest = new MyClassUnderTest(stubbedAssemblyLoader);
  var result = myClassUnderTest.MethodToTest();

  // assert
  Assert.AreEqual("expected result", result);
}

public interface IAssemblyLoader {
  Assembly GetEntryAssembly();
}
public class AssemblyLoader : IAssemblyLoader {
  public Assembly GetEntryAssembly() {
    return Assembly.GetEntryAssembly();
  }
}

更新：Rhino Mocks 不再积极维护，但可以与其他模拟库（例如 起订量