ReactorStreamsServiceEventTypeTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.component.reactor.engine;

import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.component.reactive.streams.ReactiveStreamsConstants;
import org.junit.Assert;
import org.junit.Test;
import org.reactivestreams.Subscriber;
import reactor.core.publisher.Flux;

public class ReactorStreamsServiceEventTypeTest extends ReactorStreamsServiceTestSupport {

    @Test
    public void testOnCompleteHeaderForwarded() throws Exception {
        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("reactive-streams:numbers?forwardOnComplete=true")
                    .to("mock:endpoint");
            }
        });

        Subscriber<Integer> numbers = crs.streamSubscriber("numbers", Integer.class);

        context.start();

        Flux.<Integer>empty().subscribe(numbers);

        MockEndpoint endpoint = getMockEndpoint("mock:endpoint");
        endpoint.expectedMessageCount(1);
        endpoint.expectedHeaderReceived(ReactiveStreamsConstants.REACTIVE_STREAMS_EVENT_TYPE, "onComplete");
        endpoint.expectedBodiesReceived(new Object[]{null});
        endpoint.assertIsSatisfied();
    }

    @Test
    public void testOnCompleteHeaderNotForwarded() throws Exception {
        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("reactive-streams:numbers")
                    .to("mock:endpoint");
            }
        });

        Subscriber<Integer> numbers = crs.streamSubscriber("numbers", Integer.class);

        context.start();

        Flux.<Integer>empty().subscribe(numbers);

        MockEndpoint endpoint = getMockEndpoint("mock:endpoint");
        endpoint.expectedMessageCount(0);
        endpoint.assertIsSatisfied(200);
    }

    @Test
    public void testOnNextHeaderForwarded() throws Exception {
        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("reactive-streams:numbers")
                    .to("mock:endpoint");
            }
        });

        Subscriber<Integer> numbers = crs.streamSubscriber("numbers", Integer.class);

        context.start();

        Flux.just(1).subscribe(numbers);

        MockEndpoint endpoint = getMockEndpoint("mock:endpoint");
        endpoint.expectedHeaderReceived(ReactiveStreamsConstants.REACTIVE_STREAMS_EVENT_TYPE, "onNext");
        endpoint.expectedMessageCount(1);
        endpoint.assertIsSatisfied();

        Exchange ex = endpoint.getExchanges().get(0);
        Assert.assertEquals(1, ex.getIn().getBody());
    }

    @Test
    public void testOnErrorHeaderForwarded() throws Exception {
        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("reactive-streams:numbers?forwardOnError=true")
                    .to("mock:endpoint");
            }
        });

        Subscriber<Integer> numbers = crs.streamSubscriber("numbers", Integer.class);

        context.start();

        RuntimeException ex = new RuntimeException("1");

        Flux.just(1)
            .map(n -> {
                if (n == 1) {
                    throw ex;
                }
                return n;
            })
            .subscribe(numbers);


        MockEndpoint endpoint = getMockEndpoint("mock:endpoint");
        endpoint.expectedMessageCount(1);
        endpoint.expectedHeaderReceived(ReactiveStreamsConstants.REACTIVE_STREAMS_EVENT_TYPE, "onError");
        endpoint.assertIsSatisfied();

        Exchange exch = endpoint.getExchanges().get(0);
        Assert.assertEquals(ex, exch.getIn().getBody());
    }

    @Test
    public void testOnErrorHeaderNotForwarded() throws Exception {
        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("reactive-streams:numbers")
                    .to("mock:endpoint");
            }
        });

        Subscriber<Integer> numbers = crs.streamSubscriber("numbers", Integer.class);

        context.start();

        RuntimeException ex = new RuntimeException("1");

        Flux.just(1)
            .map(n -> {
                if (n == 1) {
                    throw ex;
                }
                return n;
            })
            .subscribe(numbers);


        MockEndpoint endpoint = getMockEndpoint("mock:endpoint");
        endpoint.expectedMessageCount(0);
        endpoint.assertIsSatisfied(200);
    }
}