extensions-contrib/kafka-emitter/src/test/java/org/apache/druid/emitter/kafka/KafkaEmitterConfigTest.java

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 * 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,
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 * specific language governing permissions and limitations
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package org.apache.druid.emitter.kafka;

import com.fasterxml.jackson.databind.InjectableValues;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.ImmutableMap;
import org.apache.druid.jackson.DefaultObjectMapper;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;

public class KafkaEmitterConfigTest
{
  private ObjectMapper mapper = new DefaultObjectMapper();

  @Before
  public void setUp()
  {
    mapper.setInjectableValues(new InjectableValues.Std().addValue(ObjectMapper.class, new DefaultObjectMapper()));
  }

  @Test
  public void testSerDeserKafkaEmitterConfig() throws IOException
  {
    KafkaEmitterConfig kafkaEmitterConfig = new KafkaEmitterConfig("hostname", "metricTest",
        "alertTest", "requestTest",
        "clusterNameTest", ImmutableMap.<String, String>builder()
        .put("testKey", "testValue").build()
    );
    String kafkaEmitterConfigString = mapper.writeValueAsString(kafkaEmitterConfig);
    KafkaEmitterConfig kafkaEmitterConfigExpected = mapper.readerFor(KafkaEmitterConfig.class)
        .readValue(kafkaEmitterConfigString);
    Assert.assertEquals(kafkaEmitterConfigExpected, kafkaEmitterConfig);
  }

  @Test
  public void testSerDeserKafkaEmitterConfigNullRequestTopic() throws IOException
  {
    KafkaEmitterConfig kafkaEmitterConfig = new KafkaEmitterConfig("hostname", "metricTest",
        "alertTest", null,
        "clusterNameTest", ImmutableMap.<String, String>builder()
        .put("testKey", "testValue").build()
    );
    String kafkaEmitterConfigString = mapper.writeValueAsString(kafkaEmitterConfig);
    KafkaEmitterConfig kafkaEmitterConfigExpected = mapper.readerFor(KafkaEmitterConfig.class)
        .readValue(kafkaEmitterConfigString);
    Assert.assertEquals(kafkaEmitterConfigExpected, kafkaEmitterConfig);
  }

  @Test
  public void testSerDeNotRequiredKafkaProducerConfig()
  {
    KafkaEmitterConfig kafkaEmitterConfig = new KafkaEmitterConfig("localhost:9092", "metricTest",
        "alertTest", null,
        "clusterNameTest", null
    );
    try {
      @SuppressWarnings("unused")
      KafkaEmitter emitter = new KafkaEmitter(kafkaEmitterConfig, mapper);
    }
    catch (NullPointerException e) {
      Assert.fail();
    }
  }

  @Test
  public void testJacksonModules()
  {
    Assert.assertTrue(new KafkaEmitterModule().getJacksonModules().isEmpty());
  }
}