public void FamilyIsNotNull()
 {
     var family = new Family();
     family.dad = new Person();
     family.mom = new Person();
     family.AddChild(new Person());
     Assert.NotNull(family);
 }
        public void RandomFamilyHasSameLastName()
        {
            var family = new Family();
            family.RandomFamily();

            string familyName = family.dad.familyName;
            Assert.Equal(familyName, family.mom.familyName);
            foreach(Person c in family.children)
            {
                Assert.Equal(familyName, c.familyName);
            }
        }