@Test
  public void checkValidOperation() throws Exception {
    exception.expect(RuntimeException.class);
    exception.expectMessage(
        "Invalid operation specified for disk device. The disk device can be only added or removed.");

    VmInputs vmInputs =
        new VmInputs.VmInputsBuilder().withDevice("disk").withOperation("update").build();
    InputUtils.checkValidOperation(vmInputs, "disk");
  }