public async void ReturnValidModelForCorrectId(int?id)
{
var result = await sut.Edit(id);
var vr = Assert.IsType <ViewResult>(result);
fixture.repositoryWrapper.Verify(y => y.Service.GetServiceByIdAsync(id), Times.Once);
Assert.Equal("Edit", vr.ViewName);
Assert.IsAssignableFrom <ServiceDTO>(vr.Model);
}