Moq Returns 方法未按预期工作

Question

看看这段代码：

var thirdLevelCacheMock = new Mock<IDatabase>();
RedisValue val = "not empty or null string";
thirdLevelCacheMock.Setup(m => m.StringGetAsync(It.IsAny<string>(), It.IsAny<CommandFlags>())).Returns(Task.FromResult(val));

CachingInfrastructure caching = new CachingInfrastructure();
caching._thirdLevelCache = thirdLevelCacheMock.Object;

var operation = caching.GetKeyAsync("bla", CacheLevel.Any);

Assert.DoesNotThrow(() => { operation.Wait(); });
Assert.IsNotNull(operation.Result);

如您所见，我将 StringGetAsync 的 return 设置为一个简单的非 empty/null 字符串。

我的问题是，在 caching.GetKeyAsync 中，对该方法的调用是 return 一个空结果。我在这里做错了什么？

GetKeyAsync 代码：

result = _thirdLevelCache.StringGetAsync(key, CommandFlags.None).ContinueWith((prev) =>
      {
            string res = null;
            if (!prev.Result.IsNull)
            {
               res = prev.Result.ToString();
            }
            return res as object;
      });

Answer 1

尝试使用 async/await 和 Moq 的 ResturnsAsync 来练习测试，而不是使用阻塞调用 .Wait()。

public async Task TestMthod() {
    //Arrange
    var expected = "not empty or null string";
    var thirdLevelCacheMock = new Mock<IDatabase>();
    RedisValue val = expected;
    thirdLevelCacheMock
        .Setup(m => m.StringGetAsync(It.IsAny<string>(), It.IsAny<CommandFlags>()))
        .ReturnsAsync(val);

    var caching = new CachingInfrastructure();
    caching._thirdLevelCache = thirdLevelCacheMock.Object;

    //Act
    var actual = await caching.GetKeyAsync("bla", CacheLevel.Any);

    //Assert
    Assert.IsNotNull(actual);
    Assert.AreEqual(expected, actual);
}

Answer 2

我用 It.IsAny<RedisKey>()

替换了 It.IsAny<string>()

Moq Returns 方法未按预期工作

Moq Returns method not working as expected

c#

unit-testing

moq

mocking

azure-redis-cache