def test_inv_invalid_shape(self):
# setup
test_list = self._generate_random_list(row=3, col=4)
test_mat = Matrix(test_list)
# exercise and verify
with self.assertRaises(ValueError):
test_mat.inv()
def test_inv_invalid_value(self):
# setup
test_list = \
[
[
j + 5 * i
for j in range(5)
]
for i in range(5)
]
test_mat = Matrix(test_list)
# exercise and verify
with self.assertRaises(ValueError):
test_mat.inv()
def test_inv_invalid_value(self):
# setup
test_list = \
[
[1., 2., 3., 4.],
[8., 7., 6., 8.],
[9., 12., 11., 12.],
[16., 15., 14., 13.],
]
test_mat = Matrix(test_list)
np_mat = np.array(test_list)
# exercise
test_inv = test_mat.inv()
np_inv = LA.inv(np_mat)
# verify
self._compare_all_elements(test_inv, np_inv)