public void ajouterNoteFraisTest()
        {
            Commercial c = new Commercial("Jean", "Dupond", 25, 'A');
            NoteFrais  f, f1;

            f  = new NoteFrais(new DateTime(2013, 11, 12), c);
            f1 = new NoteFrais(new DateTime(2013, 11, 15), c);
            Assert.AreEqual(2, c.getMesNotesFrais().Count);
        }