public void GetSum()
{
DoubleVector a = new DoubleVector(new double[4]{0,1,2,3});
DoubleVector b = new DoubleVector(new double[4]{4,5,6,7});
Assert.AreEqual(a.GetSum(),6);
Assert.AreEqual(a.GetSum(),a.GetSumMagnitudes());
Assert.AreEqual(b.GetSum(),22);
Assert.AreEqual(b.GetSum(),b.GetSumMagnitudes());
}