@After
  public void after() {
    Assert.assertEquals("All operations should have completed", 0, router.getOperationsCount());
    nettyByteBufLeakHelper.afterTest();
    assertCloseCleanup(router);
  }
A checker that either asserts that a get operation succeeds or returns the specified error code.P
ambry-router/src/test/java/com/github/ambry/router/GetBlobOperationTest.java