CODEWITHSUNDEEP
c#unit-testingmoq
evilfish
evilfish

Reputation: 701

Moq setup of generic method does not return specified value

I have a settings class where I have an interface with the following generic method:

T GetValue<T>(string key, bool optional = false, T defaultValue = default(T));

I am now working on another part that uses this setting system and is using the above method to extract information from the setting object:

Machine.BaudRate = Settings.GetValue<int>("BAUDRATE");
Machine.ComPort = Settings.GetValue<int>("COMPORT");

I would like this to be tested by a unit test so I write the following:

Settings.Setup(s => s.GetValue<int>("BAUDRATE",It.IsAny<bool>(),It.IsAny<int>())).Returns(57600);
Settings.Setup(s => s.GetValue("COMPORT", It.IsAny<bool>(),It.IsAny<int>())).Returns(5);

But when I run the test it returns 0 on both of them. If I put in a callback I can see that callback is hit, so the setup has worked correctly. Why won't it return the values indicated in the setup?

Callback example (I have a exception variable I just set to null to have something to break on during debug):

Settings.Setup(s => s.GetValue("COMPORT", false,It.IsAny<int>())).Callback(() => ex = null).Returns(5);

Upvotes: 0

Views: 207

Answers (1)

evilfish
evilfish

Reputation: 701

I don't know why in my code I get 0 returned, but I found a way to verify my inputs. My inputs are routed through the class i am testing and out to another interface. Becuase of this I can just change setups on that facade to validate the input:

Facade.SetupSet(f => f.BaudRate = It.IsAny<int>()).Callback((int value) => Assert.AreEqual(57600, value)).Verifiable();
Facade.SetupSet(f => f.ComPort = It.IsAny<int>()).Callback((int value) => Assert.AreEqual(5, value)).Verifiable();

Upvotes: 1

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