c# - 测试闭包

Question

我正在尝试测试一个非常简单的方法。 _interactionService 提出对话框，要求用户确认删除客户。如果在框上单击了适当的按钮，则会调用提供的操作。该操作操纵上下文并保存更改。保存完成后调用另一个操作。

    private void Delete(object entity)
{
    _interactionService.ShowConfirmationBox("Delete?", "Are you sure you want to delete this customer?", () =>
        {
            Customer customer = entity as Customer;
            Context.Attach(customer);
            Context.Delete(customer);
            Context.Save(() => DoSomethingElseWhenSaveComplete);
        });
}

我不知道如何测试这个方法。我已经模拟了服务和上下文，但是如何测试闭包呢？

Answer 1

如果上下文被模拟，那么你可以使用 callback在你的测试中:

Action saveAction = null;
contextMock
  .Setup(c => c.Save(It.IsAny<Action>())
  .Callback<Action>(a => saveAction = a);

// Call delete...

Assert.IsNotNull(saveAction);

saveAction();

// Assert that DoSomethingElseWhenSaveCompleted was done