def test_error_for_smallest_if_min_is_more_than_max(self):
with self.assertRaisesWithMessage(ValueError):
value, factors = smallest_palindrome(min_factor=10000,
max_factor=1)
def test_smallest_palindrome_from_four_digit_factors(self):
value, factors = smallest_palindrome(min_factor=1000, max_factor=9999)
self.assertEqual(value, 1002001)
self.assertFactorsEqual(factors, {(1001, 1001)})
def test_empty_for_smallest_palindrome_if_none_in_range(self):
with self.assertRaisesWithMessage(ValueError):
value, factors = smallest_palindrome(min_factor=1002,
max_factor=1003)
def test_smallest_palindrome_from_single_digit_factors(self):
value, factors = smallest_palindrome(min_factor=1, max_factor=9)
self.assertEqual(value, 1)
self.assertFactorsEqual(factors, {(1, 1)})
def test_smallest_palindrome_from_double_digit_factors(self):
value, factors = smallest_palindrome(min_factor=10, max_factor=99)
self.assertEqual(value, 121)
self.assertFactorsEqual(factors, {(11, 11)})
def test_smallest_palindrome_from_triple_digit_factors(self):
value, factors = smallest_palindrome(max_factor=999, min_factor=100)
self.assertEqual(value, 10201)
self.assertEqual(set(factors), {101, 101})
def test_empty_for_smallest_palindrome_if_none_in_range(self):
value, factors = smallest_palindrome(min_factor=1002, max_factor=1003)
self.assertIsNone(value)
self.assertEqual(factors, [])
def test_error_for_smallest_if_min_is_more_than_max(self):
with self.assertRaisesWithMessage(ValueError):
value, factors = smallest_palindrome(min_factor=10000,
max_factor=1)
def test_smallest_palindrome_from_double_digit_factors(self):
value, factors = smallest_palindrome(max_factor=99, min_factor=10)
self.assertEqual(value, 121)
self.assertEqual(set(factors), {11})
def test_empty_for_smallest_palindrome_if_none_in_range(self):
value, factors = smallest_palindrome(min_factor=1002, max_factor=1003)
self.assertIsNone(value)
self.assertFactorsEqual(factors, [])
def test_smallest_palindrome_from_four_digit_factors(self):
value, factors = smallest_palindrome(min_factor=1000, max_factor=9999)
self.assertEqual(value, 1002001)
self.assertFactorsEqual(factors, {(1001, 1001)})
def test_smallest_palindrome_from_double_digit_factors(self):
value, factors = smallest_palindrome(min_factor=10, max_factor=99)
self.assertEqual(value, 121)
self.assertFactorsEqual(factors, {(11, 11)})
def test_smallest_palindrome_from_single_digit_factors(self):
value, factors = smallest_palindrome(min_factor=1, max_factor=9)
self.assertEqual(value, 1)
self.assertFactorsEqual(factors, {(1, 1)})
def test_empty_for_smallest_palindrome_if_none_in_range(self):
with self.assertRaisesWithMessage(ValueError):
value, factors = smallest_palindrome(min_factor=1002,
max_factor=1003)
