private void verifyDeleteAccepted(RestRequest restRequest) throws Exception {
    MockRestResponseChannel restResponseChannel = new MockRestResponseChannel();
    doOperation(restRequest, restResponseChannel);
    assertEquals("Unexpected response status", ResponseStatus.Accepted, restResponseChannel.getStatus());
    assertTrue("No Date header", restResponseChannel.getHeader(RestUtils.Headers.DATE) != null);
    assertEquals("Content-Length is not 0", "0", restResponseChannel.getHeader(RestUtils.Headers.CONTENT_LENGTH));
  }
Verifies that a request returns the right response code  once the blob has been deleted.
@param restRequest the {@link RestRequest} to send to {@link FrontendRestRequestService}.
@throws Exception
ambry-frontend/src/test/java/com/github/ambry/frontend/FrontendRestRequestServiceTest.java