def test_big_integer_mul_empty_to_empty(self):
a = BigInteger()
b = BigInteger()
c = a * b
self.assertEqual(c, BigInteger())
def test_big_integer_sub_full_to_empty(self):
a = BigInteger([9, 9, 9])
b = BigInteger()
c = a - b
self.assertEqual(c, BigInteger([9, 9, 9]))
def test_big_integer_sub_full_border(self):
a = BigInteger([8, 5, 0, 1])
b = BigInteger([9, 5])
c = a - b
self.assertEqual(c, BigInteger([9, 9, 9]))
def test_big_integer_can_create(self):
big_integer = BigInteger()
self.assertTrue(isinstance(big_integer, BigInteger))
def test_big_integer_sub_full_to_full(self):
a = BigInteger([6, 7, 3])
b = BigInteger([5, 5])
c = a - b
self.assertEqual(c, BigInteger([1, 2, 3]))
def test_big_integer_eq_false_empty(self):
a = BigInteger()
b = BigInteger([2, 1, 1, 4, 5])
self.assertNotEqual(a, b)
def test_big_integer_eq_true_empty_diff(self):
a = BigInteger()
b = BigInteger([])
self.assertEqual(a, b)
def test_big_integer_eq_false_diff_size(self):
a = BigInteger([1, 1, 1])
b = BigInteger([2, 1, 1, 4, 5])
self.assertNotEqual(a, b)
def test_big_integer_eq_true(self):
a = BigInteger([1, 1, 1])
b = BigInteger([1, 1, 1])
self.assertEqual(a, b)
def test_big_integer_can_create_full(self):
big_integer = BigInteger([2, 1, 4])
self.assertTrue(isinstance(big_integer, BigInteger))
def test_big_integer_mul_full_to_full(self):
a = BigInteger([8, 7, 1])
b = BigInteger([5, 5])
c = a * b
self.assertEqual(c, BigInteger([0, 9, 7, 9]))
def string_to_big_integer(string):
np_array = np.array([])
for i, v in enumerate(string):
np_array = np.insert(np_array, 0, int(v))
return BigInteger(np_array.tolist())