public void CheckToString()
{
var matrix = new matrix("1 2 3;4 5 6;7 8 9");
string matrixAsString = matrix.ToString();
Assert.IsTrue(matrixAsString.Contains("matrix([[1, 2, 3]"));
Assert.IsTrue(matrixAsString.Contains("[4, 5, 6]"));
Assert.IsTrue(matrixAsString.Contains("[7, 8, 9]"));
}
