@Test
 public void testUploadBufferSizeUserSpecified() {
   GcsOptions pipelineOptions = gcsOptionsWithTestCredential();
   pipelineOptions.setGcsUploadBufferSizeBytes(12345);
   GcsUtil util = pipelineOptions.getGcsUtil();
   assertEquals((Integer) 12345, util.getUploadBufferSizeBytes());
 }
 @Test
 public void testUploadBufferSizeDefault() {
   GcsOptions pipelineOptions = gcsOptionsWithTestCredential();
   GcsUtil util = pipelineOptions.getGcsUtil();
   assertNull(util.getUploadBufferSizeBytes());
 }