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PublisherIT.java
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PublisherIT.java
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/*
* Copyright 2020 Google LLC
*
* 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 pubsub;
import static com.google.common.truth.Truth.assertThat;
import static junit.framework.TestCase.assertNotNull;
import com.google.cloud.pubsub.v1.TopicAdminClient;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.TopicName;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.UUID;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.Timeout;
public class PublisherIT {
private ByteArrayOutputStream bout;
private PrintStream out;
private static final String projectId = System.getenv("GOOGLE_CLOUD_PROJECT");
private static final String _suffix = UUID.randomUUID().toString();
private static final String topicId = "publisher-test-topic-" + _suffix;
private static final TopicName topicName = TopicName.of(projectId, topicId);
private static void requireEnvVar(String varName) {
assertNotNull(
"Environment variable " + varName + " is required to perform these tests.",
System.getenv(varName));
}
@Rule public Timeout globalTimeout = Timeout.seconds(300); // 5 minute timeout
@BeforeClass
public static void checkRequirements() {
requireEnvVar("GOOGLE_CLOUD_PROJECT");
}
@Before
public void setUp() throws Exception {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
Topic topic = Topic.newBuilder().setName(topicName.toString()).build();
topicAdminClient.createTopic(topic);
}
}
@After
public void tearDown() throws Exception {
try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
topicAdminClient.deleteTopic(topicName.toString());
}
System.setOut(null);
}
@Test
public void testPublisher() throws Exception {
// Test quickstart publish
PublisherExample.publisherExample(projectId, topicId);
assertThat(bout.toString()).contains("Published message ID: ");
bout.reset();
// Test publish with error handling
PublishWithErrorHandlerExample.publishWithErrorHandlerExample(projectId, topicId);
assertThat(bout.toString()).contains("Published message ID: ");
bout.reset();
// Test publish with custom attributes.
PublishWithCustomAttributesExample.publishWithCustomAttributesExample(projectId, topicId);
assertThat(bout.toString()).contains("Published a message with custom attributes: ");
bout.reset();
// Test publish with batch settings.
PublishWithBatchSettingsExample.publishWithBatchSettingsExample(projectId, topicId);
assertThat(bout.toString()).contains("Published 100 messages with batch settings.");
bout.reset();
// Test publish with flow control settings.
PublishWithFlowControlExample.publishWithFlowControlExample(projectId, topicId);
assertThat(bout.toString()).contains("Published 1000 messages with flow control settings.");
bout.reset();
// Test publish with concurrency control.
PublishWithConcurrencyControlExample.publishWithConcurrencyControlExample(projectId, topicId);
assertThat(bout.toString()).contains("Published 100 messages with concurrency control.");
bout.reset();
// Test publish with Retry settings.
PublishWithRetrySettingsExample.publishWithRetrySettingsExample(projectId, topicId);
assertThat(bout.toString()).contains("Published a message with retry settings: ");
bout.reset();
// Test publish with ordering keys.
PublishWithOrderingKeys.publishWithOrderingKeysExample(projectId, topicId);
for (int i = 1; i <= 4; i++) {
assertThat(bout.toString()).contains("message" + i);
}
bout.reset();
// Test resume publish with ordering keys.
ResumePublishWithOrderingKeys.resumePublishWithOrderingKeysExample(projectId, topicId);
for (int i = 1; i <= 4; i++) {
assertThat(bout.toString()).contains("message" + i);
}
}
}