模拟上的所有调用都必须具有相应的设置

Question

我有一些遗留代码,我想进行单元测试.我创建了第一个moq测试但是我得到以下异常:

Moq.MockException:IConnection.SendRequest(ADF.Messaging.Contract.ConfigServer.GetDataVersionRequest)调用失败,模拟行为为Strict.模拟上的所有调用都必须具有相应的设置.

重要的代码:

课堂资产:

Public Property Connection() As IConnection
    Get
        Return _connection
    End Get
    Set(ByVal value As IConnection)
        _connection = value
    End Set
End Property

应该测试的方法:(_ connect)实际上是一个创建tcp套接字的类,我想要模拟该属性,以便SendRequest返回我想要的内容.

Public Function GetVersion(ByVal appID As Contract.ApplicationID) As Contract.DataVersion
    EnsureConnected()
    Dim req As GetDataVersionRequest = New GetDataVersionRequest(appID)

    Dim reply As CentralServiceReply = _connection.SendRequest(req) //code I want to mock
    Utils.Check.Ensure(TypeOf reply Is GetDataVersionReply, String.Format("Unexpected type: {0}, expected GetDataVersionReply!", reply.GetType()))

    Dim version As Contract.DataVersion = CType(reply, GetDataVersionReply).Version
    version.UpgradeOwners()
    If (Not version.IsSupported) Then
        Return Contract.DataVersion.UNSUPPORTED
    End If

    Return version
End Function

测试方法:

[TestMethod]
public void TestMethod2()
{
    Contract.CentralServiceRequest req = new Contract.ConfigServer.GetDataVersionRequest(new ApplicationID("AMS", "QA"));

    DataVersion v = new DataVersion();
    v.AppVersion = "16";
    CentralServiceReply reply = new GetDataVersionReply(v);

    var ConnectionMock = new Mock<IConnection>(MockBehavior.Strict);
    ConnectionMock.Setup(f => f.SendRequest(req)).Returns(reply);

    var proxy = new ConfigServerProxy(new ApplicationID("AMS", "QA"), "ws23545", 8001);
    proxy.Connection = ConnectionMock.Object; //assign mock object

    DataVersion v2 = proxy.GetVersion(new ApplicationID("AMS", "QA"));
    Assert.AreEqual(v.AppVersion, v2.AppVersion);
}

当我调试单元测试时,我看到当在行_connection.SendRequest上执行proxy.GetVersion时,我们得到了错误.此外,当我在观察窗口中观察变量(_connection)时,我看到它是moq对象.所以我认为财产分配进展顺利.

有人看到我哪里出错了吗？

Answer 1

我想问题出现在以下方面:

Contract.CentralServiceRequest req = new Contract.ConfigServer.GetDataVersionRequest(new ApplicationID("AMS", "QA"));

Proxy调用获取应用程序版本,但不使用相同的请求对象(它可能会创建另一个具有相同参数的请求对象).由于它是不同的对象而mock被设置为期望相同,因此失败.

合理的解决方案是期望任何类型的CentralServiceRequest请求.我不太熟悉Moq,但我想它是这样的:

ConnectionMock.Setup(f => f.SendRequest(ItExpr.IsAny<Contract.CentralServiceRequest>())).Returns(reply);

希望这可以帮助.