@Test
  public void putFailureTest() throws Exception {
    // unrecognized operation
    RestRequest restRequest = createRestRequest(RestMethod.PUT, "/non-existent-op", null, null);
    verifyOperationFailure(restRequest, RestServiceErrorCode.BadRequest);
  }
Checks reactions of PUT methods in {@link FrontendRestRequestService} when there are bad request parameters
@throws Exception
ambry-frontend/src/test/java/com/github/ambry/frontend/FrontendRestRequestServiceTest.java