public void Deve_Adicionar_Duas_Avaliacoes()
{
Subject matematica = new Subject("Matematica", _teacher);
Subject portugues = new Subject("Portugues", _teacher);
_boletim.AddEvaluation(new Evaluation(matematica, 4));
_boletim.AddEvaluation(new Evaluation(portugues, 10));
Assert.AreEqual(2, _boletim.EvaluationQuatity);
}