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"""
Notes regarding the implementation of smallest_palindrome and
largest_palindrome:
Both functions must take two keyword arguments:
max_factor -- int
min_factor -- int, default 0
Their return value must be a tuple (value, factors) where value is the
palindrome itself, and factors is an iterable containing both factors of the
palindrome in arbitrary order.
"""
import unittest
from palindrome_products import smallest_palindrome, largest_palindrome
class PalindromesTests(unittest.TestCase):
def test_largest_palindrome_from_single_digit_factors(self):
value, factors = largest_palindrome(max_factor=9)
self.assertEqual(value, 9)
self.assertIn(set(factors), [{1, 9}, {3, 3}])
def test_largest_palindrome_from_double_digit_factors(self):
value, factors = largest_palindrome(max_factor=99, min_factor=10)
self.assertEqual(value, 9009)
self.assertEqual(set(factors), {91, 99})
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_largest_palindrome_from_triple_digit_factors(self):
value, factors = largest_palindrome(max_factor=999, min_factor=100)
self.assertEqual(value, 906609)
self.assertEqual(set(factors), {913, 993})
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})
if __name__ == '__main__':
unittest.main()
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178 entries across 178 versions & 1 rubygems