public static Builder builder(String bucket, String testClassName, Credentials credentials) {
    checkArgument(!bucket.equals(""));
    checkArgument(!testClassName.equals(""));

    return new Builder(bucket, testClassName, credentials);
  }
@Test
  public void testBuilderWithEmptyTestClassName() {
    assertThrows(
        IllegalArgumentException.class, () -> GcsResourceManager.builder(BUCKET, "", null).build());
  }