Prevent Name collisions on tests (#1466)

Author: nnegrey

vision/automl/src/test/java/com/google/cloud/vision/samples/automl/DatasetApiIT.java

@@ -21,6 +21,7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 
+import java.util.UUID;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -35,7 +36,6 @@ public class DatasetApiIT {
   private static final String PROJECT_ID = "java-docs-samples-testing";
   private static final String BUCKET = PROJECT_ID + "-vcm";
   private static final String COMPUTE_REGION = "us-central1";
-  private static final String DATASET_NAME = "test_vision_dataset";
   private ByteArrayOutputStream bout;
   private PrintStream out;
   private String datasetId;
@@ -54,8 +54,13 @@ public void tearDown() {
 
   @Test
   public void testCreateImportDeleteDataset() {
+    // Create a random dataset name with a length of 32 characters (max allowed by AutoML)
+    // To prevent name collisions when running tests in multiple java versions at once.
+    // AutoML doesn't allow "-", but accepts "_"
+    String datasetName = String.format("test_%s",
+        UUID.randomUUID().toString().replace("-", "_").substring(0, 26));
     // Act
-    DatasetApi.createDataset(PROJECT_ID, COMPUTE_REGION, DATASET_NAME, false);
+    DatasetApi.createDataset(PROJECT_ID, COMPUTE_REGION, datasetName, false);
 
     // Assert
     String got = bout.toString();