metron-interface/metron-rest/src/test/java/org/apache/metron/rest/service/impl/KafkaServiceImplTest.java - metron - Git at Google

 /*
  * 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.metron.rest.service.impl;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 import static org.powermock.api.mockito.PowerMockito.mock;

 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
 import kafka.admin.AdminOperationException;
 import kafka.admin.AdminUtils$;
 import kafka.admin.RackAwareMode;
 import kafka.utils.ZkUtils;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.kafka.clients.consumer.ConsumerRecords;
 import org.apache.kafka.clients.consumer.KafkaConsumer;
 import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerRecord;
 import org.apache.kafka.common.Node;
 import org.apache.kafka.common.PartitionInfo;
 import org.apache.kafka.common.TopicPartition;
 import org.apache.metron.rest.RestException;
 import org.apache.metron.rest.model.KafkaTopic;
 import org.apache.metron.rest.service.KafkaService;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.junit.runner.RunWith;
 import org.powermock.core.classloader.annotations.PowerMockIgnore;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
 import org.springframework.kafka.core.ConsumerFactory;


 @SuppressWarnings("unchecked")
 @RunWith(PowerMockRunner.class)
 @PowerMockIgnore("javax.management.*") // resolve classloader conflict
 @PrepareForTest({AdminUtils$.class})
 public class KafkaServiceImplTest {
   @Rule
   public final ExpectedException exception = ExpectedException.none();

   private ZkUtils zkUtils;
   private KafkaConsumer<String, String> kafkaConsumer;
   private KafkaProducer<String, String> kafkaProducer;
   private ConsumerFactory<String, String> kafkaConsumerFactory;
   private AdminUtils$ adminUtils;

   private KafkaService kafkaService;


   private static final KafkaTopic VALID_KAFKA_TOPIC = new KafkaTopic() {{
     setReplicationFactor(2);
     setNumPartitions(1);
     setName("t");
     setProperties(new Properties());
   }};

   @SuppressWarnings("unchecked")
   @Before
   public void setUp() throws Exception {
     zkUtils = mock(ZkUtils.class);
     kafkaConsumerFactory = mock(ConsumerFactory.class);
     kafkaConsumer = mock(KafkaConsumer.class);
     kafkaProducer = mock(KafkaProducer.class);
     adminUtils = mock(AdminUtils$.class);

     when(kafkaConsumerFactory.createConsumer()).thenReturn(kafkaConsumer);

     kafkaService = new KafkaServiceImpl(zkUtils, kafkaConsumerFactory, kafkaProducer, adminUtils);
   }

   @Test
   public void listTopicsHappyPathWithListTopicsReturningNull() throws Exception {
     final Map<String, List<PartitionInfo>> topics = null;

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     final Set<String> listedTopics = kafkaService.listTopics();

     assertEquals(Sets.newHashSet(), listedTopics);

     verifyZeroInteractions(zkUtils);
     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer, zkUtils, adminUtils);
   }

   @Test
   public void listTopicsHappyPathWithListTopicsReturningEmptyMap() throws Exception {
     final Map<String, List<PartitionInfo>> topics = new HashMap<>();

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     final Set<String> listedTopics = kafkaService.listTopics();

     assertEquals(Sets.newHashSet(), listedTopics);

     verifyZeroInteractions(zkUtils);
     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer, zkUtils);
   }

   @Test
   public void listTopicsHappyPath() throws Exception {
     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("topic1", Lists.newArrayList());
     topics.put("topic2", Lists.newArrayList());
     topics.put("topic3", Lists.newArrayList());

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     final Set<String> listedTopics = kafkaService.listTopics();

     assertEquals(Sets.newHashSet("topic1", "topic2", "topic3"), listedTopics);

     verifyZeroInteractions(zkUtils);
     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer, zkUtils);
   }

   @Test
   public void listTopicsShouldProperlyRemoveOffsetTopic() throws Exception {
     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("topic1", Lists.newArrayList());
     topics.put("topic2", Lists.newArrayList());
     topics.put("topic3", Lists.newArrayList());
     topics.put("__consumer_offsets", Lists.newArrayList());

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     final Set<String> listedTopics = kafkaService.listTopics();

     assertEquals(Sets.newHashSet("topic1", "topic2", "topic3"), listedTopics);

     verifyZeroInteractions(zkUtils);
     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer, zkUtils);
   }

   @Test
   public void deletingTopicThatDoesNotExistShouldReturnFalse() throws Exception {
     when(kafkaConsumer.listTopics()).thenReturn(Maps.newHashMap());

     assertFalse(kafkaService.deleteTopic("non_existent_topic"));

     verifyZeroInteractions(zkUtils);
     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer, zkUtils);
   }

   @Test
   public void deletingTopicThatExistShouldReturnTrue() throws Exception {
     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("non_existent_topic", Lists.newArrayList());

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     assertTrue(kafkaService.deleteTopic("non_existent_topic"));

     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verify(adminUtils).deleteTopic(zkUtils, "non_existent_topic");
     verifyNoMoreInteractions(kafkaConsumer);
   }

   @Test
   public void makeSureDeletingTopicReturnsFalseWhenNoTopicsExist() throws Exception {
     final Map<String, List<PartitionInfo>> topics = null;

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     assertFalse(kafkaService.deleteTopic("non_existent_topic"));

     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer).close();
     verifyNoMoreInteractions(kafkaConsumer);
   }

   @Test
   public void getTopicShouldProperlyMapTopicToKafkaTopic() throws Exception {
     final PartitionInfo partitionInfo = mock(PartitionInfo.class);
     when(partitionInfo.replicas()).thenReturn(new Node[] {new Node(1, "host", 8080)});

     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("t", Lists.newArrayList(partitionInfo));
     topics.put("t1", Lists.newArrayList());

     final KafkaTopic expected = new KafkaTopic();
     expected.setName("t");
     expected.setNumPartitions(1);
     expected.setReplicationFactor(1);

     when(kafkaConsumer.listTopics()).thenReturn(topics);
     when(kafkaConsumer.partitionsFor("t")).thenReturn(Lists.newArrayList(partitionInfo));

     KafkaTopic actual = kafkaService.getTopic("t");
     assertEquals(expected, actual);
     assertEquals(expected.hashCode(), actual.hashCode());
   }

   @Test
   public void getTopicShouldProperlyHandleTopicsThatDontExist() throws Exception {
     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("t1", Lists.newArrayList());

     when(kafkaConsumer.listTopics()).thenReturn(topics);
     when(kafkaConsumer.partitionsFor("t")).thenReturn(Lists.newArrayList());

     assertEquals(null, kafkaService.getTopic("t"));

     verify(kafkaConsumer).listTopics();
     verify(kafkaConsumer, times(0)).partitionsFor("t");
     verify(kafkaConsumer).close();
     verifyZeroInteractions(zkUtils);
     verifyNoMoreInteractions(kafkaConsumer);
   }

   @Test
   public void createTopicShouldFailIfReplicationFactorIsGreaterThanAvailableBrokers() throws Exception {
     exception.expect(RestException.class);
     doThrow(AdminOperationException.class).when(adminUtils).createTopic(eq(zkUtils), eq("t"), eq(1), eq(2), eq(new Properties()), eq(RackAwareMode.Disabled$.MODULE$));
     kafkaService.createTopic(VALID_KAFKA_TOPIC);

   }

   @Test
   public void whenAdminUtilsThrowsAdminOperationExceptionCreateTopicShouldProperlyWrapExceptionInRestException() throws Exception {
     exception.expect(RestException.class);

     final Map<String, List<PartitionInfo>> topics = new HashMap<>();
     topics.put("1", new ArrayList<>());

     when(kafkaConsumer.listTopics()).thenReturn(topics);

     doThrow(AdminOperationException.class).when(adminUtils).createTopic(eq(zkUtils), eq("t"), eq(1), eq(2), eq(new Properties()), eq(RackAwareMode.Disabled$.MODULE$));

     kafkaService.createTopic(VALID_KAFKA_TOPIC);
   }

   @Test
   public void getSampleMessageProperlyReturnsAMessageFromAGivenKafkaTopic() throws Exception {
     final String topicName = "t";
     final Node host = new Node(1, "host", 8080);
     final Node[] replicas = {host};
     final List<PartitionInfo> partitionInfo = Lists.newArrayList(new PartitionInfo(topicName, 1, host, replicas, replicas));
     final TopicPartition topicPartition = new TopicPartition(topicName, 1);
     final List<TopicPartition> topicPartitions = Lists.newArrayList(topicPartition);
     final Set<TopicPartition> topicPartitionsSet = Sets.newHashSet(topicPartitions);
     final ConsumerRecords<String, String> records = new ConsumerRecords<>(new HashMap<TopicPartition, List<ConsumerRecord<String, String>>>() {{
       put(topicPartition, Lists.newArrayList(new ConsumerRecord<>(topicName, 1, 1, "k", "message")));
     }});

     when(kafkaConsumer.listTopics()).thenReturn(new HashMap<String, List<PartitionInfo>>() {{ put(topicName, Lists.newArrayList()); }});
     when(kafkaConsumer.partitionsFor(eq(topicName))).thenReturn(partitionInfo);
     when(kafkaConsumer.assignment()).thenReturn(topicPartitionsSet);
     when(kafkaConsumer.position(topicPartition)).thenReturn(1L);
     when(kafkaConsumer.poll(100)).thenReturn(records);

     assertEquals("message", kafkaService.getSampleMessage(topicName));

     verify(kafkaConsumer).assign(eq(topicPartitions));
     verify(kafkaConsumer).assignment();
     verify(kafkaConsumer).poll(100);
     verify(kafkaConsumer).unsubscribe();
     verify(kafkaConsumer, times(2)).position(topicPartition);
     verify(kafkaConsumer).seek(topicPartition, 0);

     verifyZeroInteractions(zkUtils, adminUtils);
   }

   @Test
   public void produceMessageShouldProperlyProduceMessage() throws Exception {
     final String topicName = "t";
     final String message = "{\"field\":\"value\"}";

     kafkaService.produceMessage(topicName, message);

     String expectedMessage = "{\"field\":\"value\"}";
     verify(kafkaProducer).send(new ProducerRecord<>(topicName, expectedMessage));
     verifyZeroInteractions(kafkaProducer);
   }

   @Test
   public void addACLtoNonExistingTopicShouldReturnFalse() throws Exception{
     when(kafkaConsumer.listTopics()).thenReturn(Maps.newHashMap());
     assertFalse(kafkaService.addACLToCurrentUser("non_existent_topic"));
   }


 }
	/*
	* 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.metron.rest.service.impl;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;
	import static org.mockito.Matchers.eq;
	import static org.mockito.Mockito.doThrow;
	import static org.mockito.Mockito.times;
	import static org.mockito.Mockito.verify;
	import static org.mockito.Mockito.verifyNoMoreInteractions;
	import static org.mockito.Mockito.verifyZeroInteractions;
	import static org.mockito.Mockito.when;
	import static org.powermock.api.mockito.PowerMockito.mock;

	import com.google.common.collect.Lists;
	import com.google.common.collect.Maps;
	import com.google.common.collect.Sets;
	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;
	import java.util.Properties;
	import java.util.Set;
	import kafka.admin.AdminOperationException;
	import kafka.admin.AdminUtils$;
	import kafka.admin.RackAwareMode;
	import kafka.utils.ZkUtils;
	import org.apache.kafka.clients.consumer.ConsumerRecord;
	import org.apache.kafka.clients.consumer.ConsumerRecords;
	import org.apache.kafka.clients.consumer.KafkaConsumer;
	import org.apache.kafka.clients.producer.KafkaProducer;
	import org.apache.kafka.clients.producer.ProducerRecord;
	import org.apache.kafka.common.Node;
	import org.apache.kafka.common.PartitionInfo;
	import org.apache.kafka.common.TopicPartition;
	import org.apache.metron.rest.RestException;
	import org.apache.metron.rest.model.KafkaTopic;
	import org.apache.metron.rest.service.KafkaService;
	import org.junit.Before;
	import org.junit.Rule;
	import org.junit.Test;
	import org.junit.rules.ExpectedException;
	import org.junit.runner.RunWith;
	import org.powermock.core.classloader.annotations.PowerMockIgnore;
	import org.powermock.core.classloader.annotations.PrepareForTest;
	import org.powermock.modules.junit4.PowerMockRunner;
	import org.springframework.kafka.core.ConsumerFactory;


	@SuppressWarnings("unchecked")
	@RunWith(PowerMockRunner.class)
	@PowerMockIgnore("javax.management.*") // resolve classloader conflict
	@PrepareForTest({AdminUtils$.class})
	public class KafkaServiceImplTest {
	@Rule
	public final ExpectedException exception = ExpectedException.none();

	private ZkUtils zkUtils;
	private KafkaConsumer<String, String> kafkaConsumer;
	private KafkaProducer<String, String> kafkaProducer;
	private ConsumerFactory<String, String> kafkaConsumerFactory;
	private AdminUtils$ adminUtils;

	private KafkaService kafkaService;


	private static final KafkaTopic VALID_KAFKA_TOPIC = new KafkaTopic() {{
	setReplicationFactor(2);
	setNumPartitions(1);
	setName("t");
	setProperties(new Properties());
	}};

	@SuppressWarnings("unchecked")
	@Before
	public void setUp() throws Exception {
	zkUtils = mock(ZkUtils.class);
	kafkaConsumerFactory = mock(ConsumerFactory.class);
	kafkaConsumer = mock(KafkaConsumer.class);
	kafkaProducer = mock(KafkaProducer.class);
	adminUtils = mock(AdminUtils$.class);

	when(kafkaConsumerFactory.createConsumer()).thenReturn(kafkaConsumer);

	kafkaService = new KafkaServiceImpl(zkUtils, kafkaConsumerFactory, kafkaProducer, adminUtils);
	}

	@Test
	public void listTopicsHappyPathWithListTopicsReturningNull() throws Exception {
	final Map<String, List<PartitionInfo>> topics = null;

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	final Set<String> listedTopics = kafkaService.listTopics();

	assertEquals(Sets.newHashSet(), listedTopics);

	verifyZeroInteractions(zkUtils);
	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer, zkUtils, adminUtils);
	}

	@Test
	public void listTopicsHappyPathWithListTopicsReturningEmptyMap() throws Exception {
	final Map<String, List<PartitionInfo>> topics = new HashMap<>();

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	final Set<String> listedTopics = kafkaService.listTopics();

	assertEquals(Sets.newHashSet(), listedTopics);

	verifyZeroInteractions(zkUtils);
	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer, zkUtils);
	}

	@Test
	public void listTopicsHappyPath() throws Exception {
	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("topic1", Lists.newArrayList());
	topics.put("topic2", Lists.newArrayList());
	topics.put("topic3", Lists.newArrayList());

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	final Set<String> listedTopics = kafkaService.listTopics();

	assertEquals(Sets.newHashSet("topic1", "topic2", "topic3"), listedTopics);

	verifyZeroInteractions(zkUtils);
	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer, zkUtils);
	}

	@Test
	public void listTopicsShouldProperlyRemoveOffsetTopic() throws Exception {
	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("topic1", Lists.newArrayList());
	topics.put("topic2", Lists.newArrayList());
	topics.put("topic3", Lists.newArrayList());
	topics.put("__consumer_offsets", Lists.newArrayList());

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	final Set<String> listedTopics = kafkaService.listTopics();

	assertEquals(Sets.newHashSet("topic1", "topic2", "topic3"), listedTopics);

	verifyZeroInteractions(zkUtils);
	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer, zkUtils);
	}

	@Test
	public void deletingTopicThatDoesNotExistShouldReturnFalse() throws Exception {
	when(kafkaConsumer.listTopics()).thenReturn(Maps.newHashMap());

	assertFalse(kafkaService.deleteTopic("non_existent_topic"));

	verifyZeroInteractions(zkUtils);
	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer, zkUtils);
	}

	@Test
	public void deletingTopicThatExistShouldReturnTrue() throws Exception {
	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("non_existent_topic", Lists.newArrayList());

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	assertTrue(kafkaService.deleteTopic("non_existent_topic"));

	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verify(adminUtils).deleteTopic(zkUtils, "non_existent_topic");
	verifyNoMoreInteractions(kafkaConsumer);
	}

	@Test
	public void makeSureDeletingTopicReturnsFalseWhenNoTopicsExist() throws Exception {
	final Map<String, List<PartitionInfo>> topics = null;

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	assertFalse(kafkaService.deleteTopic("non_existent_topic"));

	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer).close();
	verifyNoMoreInteractions(kafkaConsumer);
	}

	@Test
	public void getTopicShouldProperlyMapTopicToKafkaTopic() throws Exception {
	final PartitionInfo partitionInfo = mock(PartitionInfo.class);
	when(partitionInfo.replicas()).thenReturn(new Node[] {new Node(1, "host", 8080)});

	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("t", Lists.newArrayList(partitionInfo));
	topics.put("t1", Lists.newArrayList());

	final KafkaTopic expected = new KafkaTopic();
	expected.setName("t");
	expected.setNumPartitions(1);
	expected.setReplicationFactor(1);

	when(kafkaConsumer.listTopics()).thenReturn(topics);
	when(kafkaConsumer.partitionsFor("t")).thenReturn(Lists.newArrayList(partitionInfo));

	KafkaTopic actual = kafkaService.getTopic("t");
	assertEquals(expected, actual);
	assertEquals(expected.hashCode(), actual.hashCode());
	}

	@Test
	public void getTopicShouldProperlyHandleTopicsThatDontExist() throws Exception {
	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("t1", Lists.newArrayList());

	when(kafkaConsumer.listTopics()).thenReturn(topics);
	when(kafkaConsumer.partitionsFor("t")).thenReturn(Lists.newArrayList());

	assertEquals(null, kafkaService.getTopic("t"));

	verify(kafkaConsumer).listTopics();
	verify(kafkaConsumer, times(0)).partitionsFor("t");
	verify(kafkaConsumer).close();
	verifyZeroInteractions(zkUtils);
	verifyNoMoreInteractions(kafkaConsumer);
	}

	@Test
	public void createTopicShouldFailIfReplicationFactorIsGreaterThanAvailableBrokers() throws Exception {
	exception.expect(RestException.class);
	doThrow(AdminOperationException.class).when(adminUtils).createTopic(eq(zkUtils), eq("t"), eq(1), eq(2), eq(new Properties()), eq(RackAwareMode.Disabled$.MODULE$));
	kafkaService.createTopic(VALID_KAFKA_TOPIC);

	}

	@Test
	public void whenAdminUtilsThrowsAdminOperationExceptionCreateTopicShouldProperlyWrapExceptionInRestException() throws Exception {
	exception.expect(RestException.class);

	final Map<String, List<PartitionInfo>> topics = new HashMap<>();
	topics.put("1", new ArrayList<>());

	when(kafkaConsumer.listTopics()).thenReturn(topics);

	doThrow(AdminOperationException.class).when(adminUtils).createTopic(eq(zkUtils), eq("t"), eq(1), eq(2), eq(new Properties()), eq(RackAwareMode.Disabled$.MODULE$));

	kafkaService.createTopic(VALID_KAFKA_TOPIC);
	}

	@Test
	public void getSampleMessageProperlyReturnsAMessageFromAGivenKafkaTopic() throws Exception {
	final String topicName = "t";
	final Node host = new Node(1, "host", 8080);
	final Node[] replicas = {host};
	final List<PartitionInfo> partitionInfo = Lists.newArrayList(new PartitionInfo(topicName, 1, host, replicas, replicas));
	final TopicPartition topicPartition = new TopicPartition(topicName, 1);
	final List<TopicPartition> topicPartitions = Lists.newArrayList(topicPartition);
	final Set<TopicPartition> topicPartitionsSet = Sets.newHashSet(topicPartitions);
	final ConsumerRecords<String, String> records = new ConsumerRecords<>(new HashMap<TopicPartition, List<ConsumerRecord<String, String>>>() {{
	put(topicPartition, Lists.newArrayList(new ConsumerRecord<>(topicName, 1, 1, "k", "message")));
	}});

	when(kafkaConsumer.listTopics()).thenReturn(new HashMap<String, List<PartitionInfo>>() {{ put(topicName, Lists.newArrayList()); }});
	when(kafkaConsumer.partitionsFor(eq(topicName))).thenReturn(partitionInfo);
	when(kafkaConsumer.assignment()).thenReturn(topicPartitionsSet);
	when(kafkaConsumer.position(topicPartition)).thenReturn(1L);
	when(kafkaConsumer.poll(100)).thenReturn(records);

	assertEquals("message", kafkaService.getSampleMessage(topicName));

	verify(kafkaConsumer).assign(eq(topicPartitions));
	verify(kafkaConsumer).assignment();
	verify(kafkaConsumer).poll(100);
	verify(kafkaConsumer).unsubscribe();
	verify(kafkaConsumer, times(2)).position(topicPartition);
	verify(kafkaConsumer).seek(topicPartition, 0);

	verifyZeroInteractions(zkUtils, adminUtils);
	}

	@Test
	public void produceMessageShouldProperlyProduceMessage() throws Exception {
	final String topicName = "t";
	final String message = "{\"field\":\"value\"}";

	kafkaService.produceMessage(topicName, message);

	String expectedMessage = "{\"field\":\"value\"}";
	verify(kafkaProducer).send(new ProducerRecord<>(topicName, expectedMessage));
	verifyZeroInteractions(kafkaProducer);
	}

	@Test
	public void addACLtoNonExistingTopicShouldReturnFalse() throws Exception{
	when(kafkaConsumer.listTopics()).thenReturn(Maps.newHashMap());
	assertFalse(kafkaService.addACLToCurrentUser("non_existent_topic"));
	}


	}