public void MatrixUtilities_Test()
{
var arr = MatrixTestsGenerator.GetTestArray();
var result = MatrixUtilities.ToString(arr);
Assert.AreEqual(result, @"1, 2, 3, 4, 5,
6, 7, 8, 9, 10,
11, 12, 13, 14, 15,
16, 17, 18, 19, 20,
21, 22, 23, 24, 25,
");
}