def test_calculating_cofactor_of_3_by_3_matrix(self):
matrix = Matrix([[3, 5, 0], [2, -1, -7], [6, -1, 5]])
assert matrix.minor(0, 0) == -12
assert matrix.minor(0, 0) == matrix.cofactor(0, 0)
assert matrix.minor(1, 0) == 25
assert matrix.cofactor(1, 0) == -25
def test_caclculating_minor_of_3_by_3_matrix(self):
matrix = Matrix([[3, 5, 0], [2, -1, -7], [6, -1, 5]])
sub_matrix = matrix.submatrix(1, 0)
determinant = sub_matrix.determinant()
minor = matrix.minor(1, 0)
assert determinant == 25
assert determinant == minor