我怎么能嘲笑这段代码呢?

本文关键字：代码段代码怎么能 | 更新日期: 2023-09-27 17:51:18

我想开始模拟一些代码，但我不确定如何做到这一点。我读过一些教程，但我不能把它应用到我的代码中(这背后可能有原因)。我用的是NUnit和Moq。(我已经删除了所有其他的方法，所以我可以给你看一个)。

Api接口:

public interface IApiRequest
{
    Task<T> ExecuteAsync<T>(RestRequest request);
}

我要Mock的方法:

public async Task<UpcomingMovies> GetUpcomingMovies(int page)
        {
            var request = new RestRequest
            {
                Resource = "movie/upcoming",
            };
            request.AddParameter("page", page.ToString());
            request.AddParameter("language", "en");
            var api = new ApiRequest();
            return await api.ExecuteAsync<UpcomingMovies>(request);
        }

我不知道如何嘲笑这个。

更新:

这现在是一个有效的测试吗?

 Mock<IApiRequest> mock = new Mock<IApiRequest>();
        mock.Setup(x => x.ExecuteAsync<UpcomingMovies>(It.IsAny<RestRequest>()))
            .Returns(Task.FromResult<UpcomingMovies>(new UpcomingMovies()));

我怎么能嘲笑这段代码呢?

如果您想模拟ExecutAsync方法，您可以这样做:

Mock<IApiRequest> mock = new Mock<IApiRequest>();
mock.Setup(x => x.ExecuteAsync<UpcomingMovies>(It.IsAny<RestRequest>()))
    .Returns(Task.FromResult<UpcomingMovies>(/** whatever movies **/));

如果您想模拟一个特定的请求，将It.IsAny<RestRequest>()替换为对您的请求的引用。

要有效地测试你的类，你需要这样做:

public class MyClass
{
    public MyClass(IApiRequest api)
    {
        this.api = api; 
    }    
    public async Task<UpcomingMovies> GetUpcomingMovies(int page)
    {
        var request = new RestRequest
        {
            Resource = "movie/upcoming",
        };
        request.AddParameter("page", page.ToString());
        request.AddParameter("language", "en");
        return await api.ExecuteAsync<UpcomingMovies>(request);
    }
}

[Test]
public async Task MyTest()
{
    var expectedMovies = new UpcomingMovies(); // or whatever movies you need
    Mock<IApiRequest> mock = new Mock<IApiRequest>();
mock.Setup(x => x.ExecuteAsync<UpcomingMovies>(It.IsAny<RestRequest>()))
    .Returns(Task.FromResult<UpcomingMovies>(expectedMovies));
    var myClass = new MyClass(mock.Object);
    var result = await myClass.GetUpcomingMovies(1);
    Assert.IsTrue(expectedMovies == result);    
}

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