Debugging

Mokkery provides tools to simplify debugging in your tests.

Mock state

You can print the state of a mock using printMokkeryDebug:

val mock = mock<Foo>()
// ...
printMokkeryDebug(mock)

This produces a JSON-like structure printed with println:

mock {
	id = your.package.Foo(1)
	mode = strict
	answers {
		call(input = any()) returns -1
		call(input = 1) returns 2
		call(input = 2) returns 4
		call(input = 3) returns 6
	}
	calls {
		call(input = 0)
		call(input = 1)
		call(input = 2)
	}
}

You can also create this debug string manually using mokkeryDebugString and process it as needed.

Logging calls

To log each call to a mock, use MokkeryCallLogger:

private val logger = MokkeryCallLogger()

@BeforeTest
fun before() {
    MokkeryCallInterceptor.beforeAnswering.register(logger)
}

@AfterTest
fun after() {
    MokkeryCallInterceptor.beforeAnswering.unregister(logger)
}

This approach ensures the logger is added only for the duration of a single test class.

For quick debugging, you can simply use:

MokkeryCallInterceptor.beforeAnswering.register(MokkeryCallLogger())