public async Task CreateAccountGroup_WhenCalledWithInvalidModel_ReturnsViewResultWhereViewNameIsEqualToCreateAccountGroup()
        {
            Controller sut = CreateSut(false);

            AccountGroupViewModel model  = CreateModel();
            ViewResult            result = (ViewResult)await sut.CreateAccountGroup(model);

            Assert.That(result.ViewName, Is.EqualTo("CreateAccountGroup"));
        }