Unit test for complex methods

Support
1

Can someone help me write the unit test for getCurrentLocation method?

 override suspend fun getCurrentLocation(locationPriority: Int) =
        suspendCancellableCoroutine { cont ->
            fusedLocationProviderClient.getCurrentLocation(
                locationPriority,
                cancellationToken,
            ).apply {
                addOnSuccessListener { location: Location? ->
                    if (location == null) {
                        cont.resumeWithException(CurrentLocationException.CurrentLocationNotFoundException())
                    } else {
                        cont.resume(location)
                    }
                }

                addOnFailureListener {
                    cont.resumeWithException(
                        CurrentLocationException.UnknownCurrentLocationException(
                            it
                        )
                    )
                }

                addOnCanceledListener {
                    cont.resumeWithException(CurrentLocationException.CurrentLocationCancelledException())
                }
            }
        }

private val cancellationToken = object : CancellationToken() {
        override fun onCanceledRequested(p0: OnTokenCanceledListener) =
            CancellationTokenSource().token

        override fun isCancellationRequested() = false
    }