public void DiagonalMatrixInsert_ValidIntFormat_ValidResult()
{
int[,] arr = new int[, ] {
{ 0, 0, 0 },
{ 0, 3, 0 },
{ 0, 0, 5 }
};
DiagonalMatrix <int> sm = new DiagonalMatrix <int>(3, arr);
sm.InsertElement(2, 2, 2);
sm.InsertElement(1, 1, 9);
Assert.AreEqual(arr[2, 2], 2);
Assert.AreEqual(arr[1, 1], 9);
}
