如何在EF4中回滚单元测试TearDown？

Question

在我关于在EF4中回滚交易的研究中,似乎每个人都参考了这篇博文或提供了类似的解释.在我的场景中,我想在单元测试场景中执行此操作,我想在我的单元测试上下文中回滚几乎我所做的一切,以防止更新数据库中的数据(是的,我们会增加计数器但是没关系).为了做到这一点,最好遵循以下计划吗？我错过了一些概念或其他任何重要的概念(除了我SetupMyTest和PerformMyTest函数不会真的存在这种方式)？

[TestMethod]
public void Foo
{
  using (var ts = new TransactionScope())
  {
    // Arrange
    SetupMyTest(context);

    // Act
    PerformMyTest(context);
    var numberOfChanges = context.SaveChanges(SaveOptions.AcceptAllChangesAfterSave);
    // if there's an issue, chances are that an exception has been thrown by now.

    // Assert
    Assert.IsTrue(numberOfChanges > 0, "Failed to _____");

    // transaction will rollback because we do not ever call Complete on it
  }
}

Answer 1

我们使用TransactionScope.

    private TransactionScope transScope;

    #region Additional test attributes
    //
    // Use TestInitialize to run code before running each test 
    [TestInitialize()]
    public void MyTestInitialize()
    {
        transScope = new TransactionScope();
    }

    // Use TestCleanup to run code after each test has run
    [TestCleanup()]
    public void MyTestCleanup()
    {
        transScope.Dispose();
    }

这将回滚在任何测试中所做的任何更改.