We had a few tests in Java and Mockito, which we are progressively converting into Kotlin and Mockk. There's a problem, though. This simple line:
verify(mockedInteractor).setIndex(1);
When we move it to mockk, we get this:
verify { mockedInteractor.index = 1 }
This of course passes the tests, as it's not actually checking that index was set to 1. It's simply setting the mock's variable to 1. This below has the same effect.
verify { mockedInteractor.setIndex(1) }
Is there a way to verify setters?
You could try capture:
val fooSlot = slot<String>()
val mockBar = mockk<Bar>()
every { mockBar.foo = capture(fooSlot) } answers { }
assertEquals(fooSlot.captured, "expected")
Yes you can:
verify { mockedInteractor setProperty "index" value 1 }
There are more examples in here https://mockk.io/#private-functions-mocking--dynamic-calls
Compact solution without hardcoded string:
verify { mockedInteractor setProperty MockedInteractor::index.name value 1 }
where MockedInteractor is mockedInteractor class
You can now relax this requirement for unit functions when defining your mock.
val foo = mockk<Foo>(relaxUnitFun = true)
Enabling this setting on your mock means you will not need to use justRun or any variation of that code (as per the Mockk documentation) when verifying unit functions are invoked.