public void Simple()
{
var matrix = new Matrix(3, 3);
// [ 1, 4, 7 ]
// [ 2, 5, 8 ]
// [ 3, 6, 9 ]
matrix[0, 0] = 1;
matrix[0, 1] = 4;
matrix[0, 2] = 7;
matrix[1, 0] = 2;
matrix[1, 1] = 5;
matrix[1, 2] = 8;
matrix[2, 0] = 3;
matrix[2, 1] = 6;
matrix[2, 2] = 9;
matrix.ChangeSignRow(1);
Assert.AreEqual(matrix[1, 0], -2);
Assert.AreEqual(matrix[1, 1], -5);
Assert.AreEqual(matrix[1, 2], -8);
}
public void ExceptionRowIndexLessThan0()
{
var matrix = new Matrix(3, 3);
matrix.ChangeSignRow(-1);
}
public void ExceptionRowIndexGreaterThanRowCount()
{
var matrix = new Matrix(3, 3);
matrix.ChangeSignRow(3);
}