public void TestPersonPetStatic1()
{
IPersonX p1 = new PersonX();
IPetX t1 = new PetX();
t1.Owner = p1;
Assert.AreEqual(t1.Owner, p1);
Assert.IsTrue(p1.Pets.Contains(t1));
}
public void TestStudentPetStatic2()
{
IStudentX s1 = new StudentX();
IPetX t1 = new PetX();
s1.Pets.Add(t1);
Assert.AreEqual(t1.Owner, s1);
Assert.IsTrue(s1.Pets.Contains(t1));
}