@Test
  public void testBucketDoesNotExistBecauseOfAccessError() throws IOException {
    GcsOptions pipelineOptions = gcsOptionsWithTestCredential();
    GcsUtil gcsUtil = pipelineOptions.getGcsUtil();

    Storage mockStorage = Mockito.mock(Storage.class);
    gcsUtil.setStorageClient(mockStorage);

    Storage.Buckets mockStorageObjects = Mockito.mock(Storage.Buckets.class);
    Storage.Buckets.Get mockStorageGet = Mockito.mock(Storage.Buckets.Get.class);

    BackOff mockBackOff = new AttemptBoundedExponentialBackOff(3, 200);
    GoogleJsonResponseException expectedException =
        googleJsonResponseException(
            HttpStatusCodes.STATUS_CODE_FORBIDDEN,
            "Waves hand mysteriously",
            "These aren't the buckets your looking for");

    when(mockStorage.buckets()).thenReturn(mockStorageObjects);
    when(mockStorageObjects.get("testbucket")).thenReturn(mockStorageGet);
    when(mockStorageGet.execute()).thenThrow(expectedException);

    assertFalse(
        gcsUtil.bucketExists(
            GcsPath.fromComponents("testbucket", "testobject"),
            mockBackOff,
            new FastNanoClockAndSleeper()));
  }
  @Test
  public void testBucketDoesNotExist() throws IOException {
    GcsOptions pipelineOptions = gcsOptionsWithTestCredential();
    GcsUtil gcsUtil = pipelineOptions.getGcsUtil();

    Storage mockStorage = Mockito.mock(Storage.class);
    gcsUtil.setStorageClient(mockStorage);

    Storage.Buckets mockStorageObjects = Mockito.mock(Storage.Buckets.class);
    Storage.Buckets.Get mockStorageGet = Mockito.mock(Storage.Buckets.Get.class);

    BackOff mockBackOff = new AttemptBoundedExponentialBackOff(3, 200);

    when(mockStorage.buckets()).thenReturn(mockStorageObjects);
    when(mockStorageObjects.get("testbucket")).thenReturn(mockStorageGet);
    when(mockStorageGet.execute())
        .thenThrow(
            googleJsonResponseException(
                HttpStatusCodes.STATUS_CODE_NOT_FOUND, "It don't exist", "Nothing here to see"));

    assertFalse(
        gcsUtil.bucketExists(
            GcsPath.fromComponents("testbucket", "testobject"),
            mockBackOff,
            new FastNanoClockAndSleeper()));
  }
  @Test
  public void testBucketExists() throws IOException {
    GcsOptions pipelineOptions = gcsOptionsWithTestCredential();
    GcsUtil gcsUtil = pipelineOptions.getGcsUtil();

    Storage mockStorage = Mockito.mock(Storage.class);
    gcsUtil.setStorageClient(mockStorage);

    Storage.Buckets mockStorageObjects = Mockito.mock(Storage.Buckets.class);
    Storage.Buckets.Get mockStorageGet = Mockito.mock(Storage.Buckets.Get.class);

    BackOff mockBackOff = new AttemptBoundedExponentialBackOff(3, 200);

    when(mockStorage.buckets()).thenReturn(mockStorageObjects);
    when(mockStorageObjects.get("testbucket")).thenReturn(mockStorageGet);
    when(mockStorageGet.execute())
        .thenThrow(new SocketTimeoutException("SocketException"))
        .thenReturn(new Bucket());

    assertTrue(
        gcsUtil.bucketExists(
            GcsPath.fromComponents("testbucket", "testobject"),
            mockBackOff,
            new FastNanoClockAndSleeper()));
  }