@Test
  public void testBlobIdNotValid() throws Exception {
    String[] input = {"123", "abcd", "", "/"};
    for (String s : input) {
      future = router.deleteBlob(s, null);
      assertFailureAndCheckErrorCode(future, RouterErrorCode.InvalidBlobId);
    }
  }
Test the cases for invalid blobId strings.
ambry-router/src/test/java/com/github/ambry/router/DeleteManagerTest.java