本文介绍了在进行单元测试时,如何模拟异步方法的返回null?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
通常,我会像这样模拟我的仓库:
Normally, I mock my repo like so:
var repository = new Mock<ISRepository>(); repository.Setup(r => r.GetMemberAsync(email)) .Returns(Task.FromResult(new Member { FirstName = firstName, LastName = lastName }));但是,在我的代码中,我检查是否未找到该成员,即GetMemberAsync返回null.我该如何嘲笑?
But, in my code, I check to see if the member is not found, i.e. GetMemberAsync returns null. How do I mock this?
我尝试过:
var repository = new Mock<ISRepository>(); repository.Setup(r => r.GetMemberAsync(email)) .Returns(Task.FromResult<object>(null));但是出现编译错误.
推荐答案由于返回的任务与异步方法返回的类型不匹配,因此会出现编译器错误.您应该返回 Task< Member> 而不是简单地 Task< object> :
You get a compiler error because you return a task that doesn't match the type the async method returns. You should return Task<Member> instead of simply Task<object>:
repository.Setup(r => r.GetMemberAsync(email)).Returns(Task.FromResult<Member>(null));更多推荐
在进行单元测试时,如何模拟异步方法的返回null?
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