def test_2_by_2(self):
m1 = [[1,2],
[3,4]]
m2 = [[5,6],
[7,8]]
r = [[19, 22],
[43, 50]]
self.assertEqual(strassen_multiply(m1, m2), r)
def test_4_by_4(self):
m1 = [[ 1, 2, 3, 4],
[ 5, 6, 7, 8],
[ 9,10,11,12],
[13,14,15,16]]
m2 = [[17,18,19,20],
[21,22,23,24],
[25,26,27,28],
[29,30,31,32]]
r = [[ 250, 260, 270, 280],
[ 618, 644, 670, 696],
[ 986,1028,1070,1112],
[1354,1412,1470,1528]]
self.assertEqual(strassen_multiply(m1, m2), r)