Add PubsubWriteIT tests, with validations to bounded writes

sdks/java/io/google-cloud-platform/src/test/java/org/apache/beam/sdk/io/gcp/pubsub/PubsubWriteIT.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, 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.beam.sdk.io.gcp.pubsub;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
+import java.util.Objects;
+import org.apache.beam.sdk.io.GenerateSequence;
+import org.apache.beam.sdk.io.gcp.pubsub.PubsubClient.TopicPath;
+import org.apache.beam.sdk.testing.TestPipeline;
+import org.apache.beam.sdk.transforms.Create;
+import org.apache.beam.sdk.transforms.MapElements;
+import org.apache.beam.sdk.values.TypeDescriptors;
+import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableMap;
+import org.apache.commons.lang3.RandomStringUtils;
+import org.joda.time.Instant;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Integration tests for {@link PubsubIO.Write} operations. */
+@RunWith(JUnit4.class)
+public class PubsubWriteIT {
+
+  @Rule public transient TestPipeline pipeline = TestPipeline.create();
+
+  private PubsubClient pubsubClient;
+
+  private TopicPath testTopic;
+
+  @Before
+  public void setup() throws IOException {
+    PubsubOptions options = TestPipeline.testingPipelineOptions().as(PubsubOptions.class);
+    String project = options.getProject();
+    pubsubClient = PubsubGrpcClient.FACTORY.newClient(null, null, options);
+    testTopic =
+        PubsubClient.topicPathFromName(project, "pubsub-write-" + Instant.now().getMillis());
+    pubsubClient.createTopic(testTopic);
+  }
+
+  @After
+  public void tearDown() throws IOException {
+    pubsubClient.deleteTopic(testTopic);
+    pubsubClient.close();
+  }
+
+  @Test
+  public void testBoundedWriteSmallMessage() {
+    String smallMessage = RandomStringUtils.randomAscii(100);
+    pipeline.apply(Create.of(smallMessage)).apply(PubsubIO.writeStrings().to(testTopic.getPath()));
+    pipeline.run();
+  }
+
+  @Test
+  public void testBoundedWriteSequence() {
+    pipeline
+        .apply(GenerateSequence.from(0L).to(1000L))
+        .apply(
+            MapElements.into(TypeDescriptors.strings())
+                .via(sequence -> Objects.requireNonNull(sequence).toString()))
+        .apply(PubsubIO.writeStrings().to(testTopic.getPath()));
+    pipeline.run();
+  }
+
+  @Test
+  public void testBoundedWriteLargeMessage() {
+    String largeMessage = RandomStringUtils.randomAscii(1_000_000);
+    pipeline.apply(Create.of(largeMessage)).apply(PubsubIO.writeStrings().to(testTopic.getPath()));
+    pipeline.run();
+  }
+
+  @Test
+  public void testBoundedWriteMessageWithAttributes() {
+    byte[] payload = RandomStringUtils.randomAscii(1_000_000).getBytes(StandardCharsets.UTF_8);
+    Map<String, String> attributes =
+        ImmutableMap.<String, String>builder()
+            .put("id", "1")
+            .put("description", RandomStringUtils.randomAscii(100))
+            .build();
+
+    pipeline
+        .apply(Create.of(new PubsubMessage(payload, attributes)))
+        .apply(PubsubIO.writeMessages().to(testTopic.getPath()));
+    pipeline.run();
+  }
+}