HADOOP-15444 ITestS3GuardToolDynamo should only run with -Ddynamo (Aaron Fabbri)

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/s3guard/ITestS3GuardToolDynamoDB.java

@@ -28,6 +28,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import com.amazonaws.services.dynamodbv2.document.DynamoDB;
 import com.amazonaws.services.dynamodbv2.document.Table;
 import com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException;
+import org.junit.Assume;
 import org.junit.Test;
 
 import org.apache.hadoop.conf.Configuration;
@@ -51,6 +52,14 @@ public class ITestS3GuardToolDynamoDB extends AbstractS3GuardToolTestBase {
     return new DynamoDBMetadataStore();
   }
 
+  @Override
+  public void setup() throws Exception {
+    super.setup();
+    Assume.assumeTrue("Test only applies when DynamoDB is used for S3Guard",
+        getConfiguration().get(Constants.S3_METADATA_STORE_IMPL).equals(
+            Constants.S3GUARD_METASTORE_DYNAMO));
+  }
+
   // Check the existence of a given DynamoDB table.
   private static boolean exist(DynamoDB dynamoDB, String tableName) {
     assertNotNull(dynamoDB);