如何为 Dispose() 的结果编写单元测试

Question

Is there a good way of testing the result of the IDisposable.Dispose()-method?

Thanks for all your answers.

Answer 1

To unit test the Dispose method, invoke Dispose and then check your mocked versions of your connection, session, and cache. Ensure that they are properly closed and cleared.

Answer 2

Ensure that after calling the .Dispose() method that all function and property getters/setters return an ObjectDisposedException .

http://msdn.microsoft.com/en-us/library/system.objectdisposedexception.aspx

Answer 3

   There are 2 sides to this question:

   1:If there are any mocked objects which in the actual method are getting disposed

    //In actual class properties be like
    public Type SomeObj = new Type();
    -----------------
    //and in dispose() you are disposing it
    public void Dispose()
    {
       SomeObj.Dispose();
    }

    now in test case you can do as follows:
    [Fact]
    public void Sometestmethod()
    {
      var myTestingClass= new TestingClass();
      myTestingClass.Dispose();
      Assert.Equal(null, myTestingClass.SomeObj);
    }

 2: If the obj getting disposed is a private obj

    private SomeType SomeObj;

    public TestingClassCtor(SomeType _someType)
    {
       SomeObj= _someObj;
    }
    --------
    //in dispose method
    public void Dispose()
    {
       SomeObj.Dispose();
    }

    Then to write Ut for this scenario

    [Fact]
    public void SomeTestMethod()
    {
      //This verifies that Dispose method in real class gets executed without any error.
      myTestClass.Dispose();
    }