/*
* 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.kafka.streams.processor.internals.assignment;
import org.apache.kafka.common.utils.Utils;
import org.apache.kafka.streams.processor.TaskId;
import org.junit.Test;
import java.util.Collections;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class ClientStateTest {
private final ClientState client = new ClientState(1);
@Test
public void shouldHaveNotReachedCapacityWhenAssignedTasksLessThanCapacity() throws Exception {
assertFalse(client.reachedCapacity());
}
@Test
public void shouldHaveReachedCapacityWhenAssignedTasksGreaterThanOrEqualToCapacity() throws Exception {
client.assign(new TaskId(0, 1), true);
assertTrue(client.reachedCapacity());
}
@Test
public void shouldAddActiveTasksToBothAssignedAndActive() throws Exception {
final TaskId tid = new TaskId(0, 1);
client.assign(tid, true);
assertThat(client.activeTasks(), equalTo(Collections.singleton(tid)));
assertThat(client.assignedTasks(), equalTo(Collections.singleton(tid)));
assertThat(client.assignedTaskCount(), equalTo(1));
assertThat(client.standbyTasks().size(), equalTo(0));
}
@Test
public void shouldAddStandbyTasksToBothStandbyAndActive() throws Exception {
final TaskId tid = new TaskId(0, 1);
client.assign(tid, false);
assertThat(client.assignedTasks(), equalTo(Collections.singleton(tid)));
assertThat(client.standbyTasks(), equalTo(Collections.singleton(tid)));
assertThat(client.assignedTaskCount(), equalTo(1));
assertThat(client.activeTasks().size(), equalTo(0));
}
@Test
public void shouldAddPreviousActiveTasksToPreviousAssignedAndPreviousActive() throws Exception {
final TaskId tid1 = new TaskId(0, 1);
final TaskId tid2 = new TaskId(0, 2);
client.addPreviousActiveTasks(Utils.mkSet(tid1, tid2));
assertThat(client.previousActiveTasks(), equalTo(Utils.mkSet(tid1, tid2)));
assertThat(client.previousAssignedTasks(), equalTo(Utils.mkSet(tid1, tid2)));
}
@Test
public void shouldAddPreviousStandbyTasksToPreviousAssigned() throws Exception {
final TaskId tid1 = new TaskId(0, 1);
final TaskId tid2 = new TaskId(0, 2);
client.addPreviousStandbyTasks(Utils.mkSet(tid1, tid2));
assertThat(client.previousActiveTasks().size(), equalTo(0));
assertThat(client.previousAssignedTasks(), equalTo(Utils.mkSet(tid1, tid2)));
}
@Test
public void shouldHaveAssignedTaskIfActiveTaskAssigned() throws Exception {
final TaskId tid = new TaskId(0, 2);
client.assign(tid, true);
assertTrue(client.hasAssignedTask(tid));
}
@Test
public void shouldHaveAssignedTaskIfStandbyTaskAssigned() throws Exception {
final TaskId tid = new TaskId(0, 2);
client.assign(tid, false);
assertTrue(client.hasAssignedTask(tid));
}
@Test
public void shouldNotHaveAssignedTaskIfTaskNotAssigned() throws Exception {
client.assign(new TaskId(0, 2), true);
assertFalse(client.hasAssignedTask(new TaskId(0, 3)));
}
@Test
public void shouldHaveMoreAvailableCapacityWhenCapacityTheSameButFewerAssignedTasks() throws Exception {
final ClientState c2 = new ClientState(1);
client.assign(new TaskId(0, 1), true);
assertTrue(c2.hasMoreAvailableCapacityThan(client));
assertFalse(client.hasMoreAvailableCapacityThan(c2));
}
@Test
public void shouldHaveMoreAvailableCapacityWhenCapacityHigherAndSameAssignedTaskCount() throws Exception {
final ClientState c2 = new ClientState(2);
assertTrue(c2.hasMoreAvailableCapacityThan(client));
assertFalse(client.hasMoreAvailableCapacityThan(c2));
}
@Test
public void shouldUseMultiplesOfCapacityToDetermineClientWithMoreAvailableCapacity() throws Exception {
final ClientState c2 = new ClientState(2);
for (int i = 0; i < 7; i++) {
c2.assign(new TaskId(0, i), true);
}
for (int i = 7; i < 11; i++) {
client.assign(new TaskId(0, i), true);
}
assertTrue(c2.hasMoreAvailableCapacityThan(client));
}
@Test
public void shouldHaveMoreAvailableCapacityWhenCapacityIsTheSameButAssignedTasksIsLess() throws Exception {
final ClientState c1 = new ClientState(3);
final ClientState c2 = new ClientState(3);
for (int i = 0; i < 4; i++) {
c1.assign(new TaskId(0, i), true);
c2.assign(new TaskId(0, i), true);
}
c2.assign(new TaskId(0, 5), true);
assertTrue(c1.hasMoreAvailableCapacityThan(c2));
}
@Test(expected = IllegalStateException.class)
public void shouldThrowIllegalStateExceptionIfCapacityOfThisClientStateIsZero() throws Exception {
final ClientState c1 = new ClientState(0);
c1.hasMoreAvailableCapacityThan(new ClientState(1));
}
@Test(expected = IllegalStateException.class)
public void shouldThrowIllegalStateExceptionIfCapacityOfOtherClientStateIsZero() throws Exception {
final ClientState c1 = new ClientState(1);
c1.hasMoreAvailableCapacityThan(new ClientState(0));
}
@Test
public void shouldHaveUnfulfilledQuotaWhenActiveTaskSizeLessThanCapacityTimesTasksPerThread() throws Exception {
final ClientState client = new ClientState(1);
client.assign(new TaskId(0, 1), true);
assertTrue(client.hasUnfulfilledQuota(2));
}
@Test
public void shouldNotHaveUnfulfilledQuotaWhenActiveTaskSizeGreaterEqualThanCapacityTimesTasksPerThread() throws Exception {
final ClientState client = new ClientState(1);
client.assign(new TaskId(0, 1), true);
assertFalse(client.hasUnfulfilledQuota(1));
}
}