Apache Camel - Definition has no children on pipeline

This is my simple route:

@Override
public void configure() {

onException(Exception.class)
    .handled(true)
    .process(exchange -> {
      Exception exception = exchange.getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class);
      log.error(logFormat.error(exchange, exception, exception.getMessage()));
      exchange.getIn().setBody(exception.getMessage());
      exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, HttpStatus.SC_INTERNAL_SERVER_ERROR);
    });

onException(HttpOperationFailedException.class)
    .handled(true)
    .to("direct:handleHttpOperationFailed");

from("direct:myRoute")
    .routeId("myRoute")
    .log("Route start: myRoute")
    .id("startStep")
    .process(
        exchange -> log.info("Doing some processing")
    )
    .id("processingStep")
    .end();
}

Now I want to write some tests:

1. exception handling case - exception is thrown after "processingStep" and handled in onException
2. positive scenario - all flow is passing without exceptions

And this is what I have done...

My test annotations:

@RunWith(CamelSpringBootRunner.class)
@UseAdviceWith
@SpringBootTest(classes = Application.class, webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
public class StarlingFpsInboundWebhookIT {
   ...
}

My two test cases:

1. With exception scenario - here I use adviceWith to throw exception after "processingStep":

@Test
public void exceptionScenario() throws Exception {

    // Given
    context.getRouteDefinition("myRoute").adviceWith(context, new AdviceWithRouteBuilder() {
      @Override
      public void configure() {
        weaveById("processingStep").after()
            .process(exchange -> {
              throw ExceptionFixtures.createSimpleException();
            })
            .id("exceptionThrowStep");
      }
    });
    context.start();

    String requestBody = ResourcesHelper.read(this.getClass(), "/data/input/request.json");

    // When
    template.send("direct:myRoute", camelExchange -> {...});
}

2. Success case - here I need to delete previously created "exceptionThrowStep" to not to throw Exception:

@Test
public void successScenario() throws Exception {

    // Given
    context.getRouteDefinition("myRoute").adviceWith(context, new AdviceWithRouteBuilder() {
      @Override
      public void configure() {
        weaveById("exceptionThrowStep").remove();
      }
    });
    context.start();


    String requestBody = ResourcesHelper.read(this.getClass(), "/data/input/request.json");

    // When
    template.send("direct:myRoute", camelExchange -> {...});
}

And when I run those tests (first exception then successful scenario) I get exception in second test:

org.apache.camel.FailedToCreateRouteException: 
Failed to create route myRoute at: 
>>> pipeline -> [[]] <<< 
in route: Route(myRoute)[[From[direct:myRoute]... 
because of Definition has no children on pipeline -> [[]]

Why this exception occurs? I have read many articles but nothing precious found about this case :( What is interesting - when in second test in adviceWith I use replace() instead of remove() everything is working...

My question are:

1. Is is good approach to test exception handling in route?
2. Can we reset the route definition between tests to avoid my approach?