kotlintestingmockkkotest

Mockk verify fails when checking called and wasNot called

I am trying to verify that a function was not called using the following:

verify {
    managementService.deleteUser(any()) wasNot Called
}

That verification fails with the message:

Verification failed: call 1 of 1: ManagementService(#11).deleteUser(any())) was not called.

If I invert the verification to this:

verify {
    managementService.deleteUser(any())
}

I still receive the same failure message.

There are other functions on ManagementService that pass wasNot Called just fine.

Why would my verification failing for wasNot Called, while the error message says the failure is because it was not called? And why would inverting the check produce the same error?

Solution

  • wasNot Called is not used to verify that a specific function call has not been made, but that an entire mock was never called, like this:

    verify {
    managementService wasNot Called
}

    If you want to verify that deleteUser was not called with any argument, you can verify that the call happened exactly zero times:

    verify(exactly = 0) {
    managementService.deleteUser(any())
}