public void ShouldSetCountToZero()
            {
                var vector = new VectorAdt <int>();

                vector.Add(1, 2, 3);
                vector.Clear();

                vector.Count.Should().Be(0);
            }
            public void ShouldThrowIndexOutOfRangeAfterClear()
            {
                var vector = new VectorAdt <int>();

                vector.Add(1, 2, 3);
                vector.Clear();

                Action act = () => vector.Get(0);

                act.Should().Throw <IndexOutOfRangeException>();
            }