@Test
public void atributosIguaisHashCodeIguais() {

    Atributo a = new Atributo("a", "d", Atributo.REAL);
    Atributo b = new Atributo("a", "d", Atributo.REAL);
    assertEquals(a, a);
    assertEquals(a, b);
    assertEquals(a.hashCode(), b.hashCode());
}