/*
* Copyright 2013 the original author or authors.
*
* 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.
*/
package org.springframework.xd.analytics.metrics.integration;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import org.junit.Test;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.xd.analytics.metrics.core.Counter;
import org.springframework.xd.analytics.metrics.core.CounterRepository;
import org.springframework.xd.analytics.metrics.memory.InMemoryCounterRepository;
/**
* @author Mark Pollack
* @author Gary Russell
* @since 1.0
*
*/
public class MessageCounterHandlerTests {
private CounterRepository repo = new InMemoryCounterRepository();
@Test
public void testNoPreexistingCounter() {
MessageCounterHandler handler = new MessageCounterHandler(repo, "tupleCounter");
Message<String> message = MessageBuilder.withPayload("Hi").build();
handler.process(message);
Counter counter = repo.findOne("tupleCounter");
assertThat(counter.getValue(), equalTo(1L));
}
@Test
public void testPreexistingCounter() {
Counter counter = new Counter("tupleCounter", 12L);
repo.save(counter);
MessageCounterHandler handler = new MessageCounterHandler(repo, "tupleCounter");
Message<String> message = MessageBuilder.withPayload("Hi").build();
handler.process(message);
counter = repo.findOne("tupleCounter");
assertThat(counter.getValue(), equalTo(13L));
}
@Test
public void testNullMsgHasNoEffect() {
Counter counter = new Counter("tupleCounter", 12L);
repo.save(counter);
MessageCounterHandler handler = new MessageCounterHandler(repo, "tupleCounter");
handler.process(null);
counter = repo.findOne("tupleCounter");
assertThat(counter.getValue(), equalTo(12L));
}
}