mosche commented on a change in pull request #16478:
URL: https://github.com/apache/beam/pull/16478#discussion_r791414430



##########
File path: 
sdks/java/io/amazon-web-services2/src/test/java/org/apache/beam/sdk/io/aws2/sqs/SqsUnboundedReaderTest.java
##########
@@ -17,113 +17,155 @@
  */
 package org.apache.beam.sdk.io.aws2.sqs;
 
+import static java.lang.System.currentTimeMillis;
+import static java.util.stream.IntStream.range;
 import static junit.framework.TestCase.assertFalse;
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.Answers.RETURNS_DEEP_STUBS;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 import java.io.IOException;
+import java.time.Clock;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.List;
+import org.apache.beam.sdk.coders.SerializableCoder;
 import org.apache.beam.sdk.io.UnboundedSource;
-import org.apache.beam.sdk.testing.TestPipeline;
+import org.apache.beam.sdk.io.aws2.sqs.EmbeddedSqsServer.TestCaseEnv;
 import org.apache.beam.sdk.util.CoderUtils;
+import org.junit.ClassRule;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
 import software.amazon.awssdk.services.sqs.SqsClient;
-import 
software.amazon.awssdk.services.sqs.model.ChangeMessageVisibilityRequest;
-import software.amazon.awssdk.services.sqs.model.SendMessageRequest;
 
 /** Tests on {@link SqsUnboundedReader}. */
-@RunWith(JUnit4.class)
+@RunWith(MockitoJUnitRunner.class)
 public class SqsUnboundedReaderTest {
   private static final String DATA = "testData";
 
-  @Rule public TestPipeline pipeline = TestPipeline.create();
+  @ClassRule public static EmbeddedSqsServer sqsServer = new 
EmbeddedSqsServer();
 
-  @Rule public EmbeddedSqsServer embeddedSqsRestServer = new 
EmbeddedSqsServer();
+  @Rule public TestCaseEnv testCase = new TestCaseEnv(sqsServer);
 
-  private SqsUnboundedSource source;
+  @Mock(answer = RETURNS_DEEP_STUBS)
+  public SqsUnboundedSource mockSource;
 
-  private void setupOneMessage() {
-    final SqsClient client = embeddedSqsRestServer.getClient();
-    final String queueUrl = embeddedSqsRestServer.getQueueUrl();
-    
client.sendMessage(SendMessageRequest.builder().queueUrl(queueUrl).messageBody(DATA).build());
-    source =
-        new SqsUnboundedSource(
-            SqsIO.read()
-                .withQueueUrl(queueUrl)
-                .withSqsClientProvider(SqsClientProviderMock.of(client))
-                .withMaxNumRecords(1));
-  }
-
-  private void setupMessages(List<String> messages) {
-    final SqsClient client = embeddedSqsRestServer.getClient();
-    final String queueUrl = embeddedSqsRestServer.getQueueUrl();
+  private void setupMessages(String... messages) {
+    final SqsClient client = testCase.getClient();
+    final String queueUrl = testCase.getQueueUrl();
     for (String message : messages) {
-      client.sendMessage(
-          
SendMessageRequest.builder().queueUrl(queueUrl).messageBody(message).build());
+      client.sendMessage(b -> b.queueUrl(queueUrl).messageBody(message));
     }
-    source =
-        new SqsUnboundedSource(
-            SqsIO.read()
-                .withQueueUrl(queueUrl)
-                .withSqsClientProvider(SqsClientProviderMock.of(client))
-                .withMaxNumRecords(messages.size()));

Review comment:
       this is only meant to test the reader, the whole source is mocked now as 
it just distracts from what's tested and only complicates things. all the 
unnecessary stuff is gone now ...




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