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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2020-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2023 Nordix Foundation.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.controlloop.common.rules.test;
import static org.assertj.core.api.Assertions.assertThatCode;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
import org.onap.policy.common.endpoints.event.comm.TopicEndpoint;
import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSink;
import org.onap.policy.common.endpoints.parameters.TopicParameters;
class ListenerTest {
private static final String EXPECTED_EXCEPTION = "expected exception";
private static final String MY_TOPIC = "my-topic";
private static final String MESSAGE = "the-message";
private static final String MESSAGE2 = "other-message";
private static final String MSG_SUFFIX = "s";
private static final String DECODED_MESSAGE = MESSAGE + MSG_SUFFIX;
private final NoopTopicSink sink = mock(NoopTopicSink.class);
private final TopicEndpoint mgr = mock(TopicEndpoint.class);
private Listener<String> listener;
/**
* Creates topics.
*/
@BeforeAll
public static void setUpBeforeClass() {
TopicEndpointManager.getManager().shutdown();
var params = new TopicParameters();
params.setTopic(MY_TOPIC);
params.setManaged(true);
params.setTopicCommInfrastructure("NOOP");
TopicEndpointManager.getManager().addTopicSinks(List.of(params));
}
@AfterAll
public static void tearDownAfterClass() {
TopicEndpointManager.getManager().shutdown();
}
/**
* Sets up.
*/
@BeforeEach
public void setUp() {
when(mgr.getNoopTopicSink(MY_TOPIC)).thenReturn(sink);
listener = new Listener<>(MY_TOPIC, msg -> msg + MSG_SUFFIX) {
@Override
protected TopicEndpoint getTopicManager() {
return mgr;
}
};
}
@Test
void testListener() {
verify(sink).register(listener);
}
@Test
void testAwait_testAwaitLongTimeUnit_testIsEmpty() {
assertTrue(listener.isEmpty());
listener.onTopicEvent(CommInfrastructure.NOOP, MY_TOPIC, MESSAGE);
assertFalse(listener.isEmpty());
assertEquals(DECODED_MESSAGE, listener.await());
assertTrue(listener.isEmpty());
}
@Test
void testAwaitPredicateOfT() {
listener.onTopicEvent(CommInfrastructure.NOOP, MY_TOPIC, MESSAGE);
listener.onTopicEvent(CommInfrastructure.NOOP, MY_TOPIC, MESSAGE2);
assertEquals(MESSAGE2 + MSG_SUFFIX, listener.await(msg -> msg.startsWith("other-")));
}
/**
* Tests await() when the remaining time is negative.
*/
@Test
void testAwaitLongTimeUnitPredicateNoTime() {
assertThatThrownBy(() -> listener.await(-1, TimeUnit.SECONDS)).isInstanceOf(TopicException.class);
}
/**
* Tests await() when the poll() returns {@code null}.
*/
@Test
void testAwaitLongTimeUnitPredicateNoMessage() {
assertThatThrownBy(() -> listener.await(1, TimeUnit.MILLISECONDS)).isInstanceOf(TopicException.class);
}
/**
* Tests await() when the poll() is interrupted.
*/
@Test
void testAwaitLongTimeUnitPredicateInterrupted() throws InterruptedException {
listener = new Listener<String>(MY_TOPIC, msg -> msg) {
@Override
protected String pollMessage(long remainingMs) throws InterruptedException {
throw new InterruptedException(EXPECTED_EXCEPTION);
}
};
AtomicReference<TopicException> exref = new AtomicReference<>();
var interrupted = new CountDownLatch(1);
var thread = new Thread() {
@Override
public void run() {
try {
listener.await();
} catch (TopicException e) {
exref.set(e);
}
if (Thread.currentThread().isInterrupted()) {
interrupted.countDown();
}
}
};
thread.start();
assertTrue(interrupted.await(5, TimeUnit.SECONDS));
assertNotNull(exref.get());
}
@Test
void testUnregister() {
listener.unregister();
verify(sink).unregister(listener);
}
@Test
void testOnTopicEvent() {
listener = new Listener<>(MY_TOPIC, msg -> {
throw new IllegalArgumentException(EXPECTED_EXCEPTION);
});
// onTopicEvent() should not throw an exception
assertThatCode(() -> listener.onTopicEvent(CommInfrastructure.NOOP, MY_TOPIC, MESSAGE))
.doesNotThrowAnyException();
// should not have queued a message
assertTrue(listener.isEmpty());
}
@Test
void testGetTopicManager() {
// use a listener with a real manager
assertNotNull(new Listener<>(MY_TOPIC, msg -> msg).getTopicManager());
}
}
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