@Test
public void testImmediateFutureMonoImmediate() {

	ImmediateEventExecutor eventExecutor = ImmediateEventExecutor.INSTANCE;
	Future<Void> promise = eventExecutor.newFailedFuture(new ClosedChannelException());
	StepVerifier.create(FutureMono.from(promise))
	            .expectError(AbortedException.class)
	            .verify(Duration.ofSeconds(30));
}