public void FailGetSetRessource(IRessourceService manager)
{
manager.Invoking(x => x.GetRessource <RessourceString>(null)).Should().Throw <ArgumentNullException>();
Func <Task> call = () => manager.GetRessourceAsync <RessourceString>(null);
call.Should().Throw <ArgumentNullException>();
manager.Invoking(x => x.SetRessource <RessourceString>(null)).Should().Throw <ArgumentNullException>();
Func <Task> call2 = () => manager.SetRessourceAsync <RessourceString>(null);
call2.Should().Throw <ArgumentNullException>();
}