//todo: change this line
@Test
    public void trouble_maker() {
        Mono<String> trouble = null; //todo: change this line
        StepVerifier.create(trouble)
                    .expectError(IllegalStateException.class)
                    .verify();
    }
@Test
public void trouble_maker() {
Mono<String> trouble = null; //todo: change this line
StepVerifier.create(trouble)
.expectError(IllegalStateException.class)
@Test
public void trouble_maker() {
Mono<String> trouble = null; //todo: change this line
StepVerifier.create(trouble)
.expectError(IllegalStateException.class)
.verify();
}
@Test
public void trouble_maker() {
Mono<String> trouble = null; //todo: change this line
StepVerifier.create(trouble)
.expectError(IllegalStateException.class)
.verify();
}