Please, how do i write a coroutine test for a func...

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[paulex]

Please, how do i write a coroutine test for a function like this..

override fun createWallet(request: CreateWalletRequest?, responseObserver: StreamObserver<Wallet>) {
        GlobalScope.launch {
            val wallet = async { return@async [e-mail](1) }
            responseObserver.onNext(wallet.await())
            responseObserver.onCompleted()
        }
    }

The code within the GlobalScope.launch runs well, i can print it out...
the onNext(value) is called and i can't seem to get the value from my test...
What i've tried but doesn't work...

@ExperimentalCoroutinesApi
    @Test
    fun `createWallet should pass`() = runBlockingTest {
        //Arrange
        val responseObserver = mockk<StreamObserver<Wallet>>()
        val slot = slot<Wallet>()

        every { responseObserver.onNext(capture(slot)) } just Runs
        every { responseObserver.onCompleted() } just Runs

        val wallet = Wallet.newBuilder().setUserId(2).build()

        coEvery { repo.get(1) } returns wallet

        val request = CreateWalletRequest.newBuilder()
            .setWallet(wallet)
            .build()

        //Act
        [e-mail](request, responseObserver)

        //Assert
        assertThat(slot.captured).isNotNull()
    }