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373 lines (297 loc) · 12.3 KB
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from algorithms.backtrack import (
add_operators,
permute,
permute_iter,
anagram,
array_sum_combinations,
unique_array_sum_combinations,
combination_sum,
get_factors,
recursive_get_factors,
find_words,
generate_abbreviations,
generate_parenthesis_v1,
generate_parenthesis_v2,
letter_combinations,
palindromic_substrings,
pattern_match,
permute_unique,
permute,
permute_recursive,
subsets_unique,
subsets,
subsets_v2,
)
import unittest
class TestAddOperator(unittest.TestCase):
def test_add_operators(self):
# "123", 6 -> ["1+2+3", "1*2*3"]
s = "123"
target = 6
self.assertEqual(add_operators(s, target), ["1+2+3", "1*2*3"])
# "232", 8 -> ["2*3+2", "2+3*2"]
s = "232"
target = 8
self.assertEqual(add_operators(s, target), ["2+3*2", "2*3+2"])
s = "123045"
target = 3
answer = ['1+2+3*0*4*5',
'1+2+3*0*45',
'1+2-3*0*4*5',
'1+2-3*0*45',
'1-2+3+0-4+5',
'1-2+3-0-4+5',
'1*2+3*0-4+5',
'1*2-3*0-4+5',
'1*23+0-4*5',
'1*23-0-4*5',
'12+3*0-4-5',
'12-3*0-4-5']
self.assertEqual(add_operators(s, target), answer)
class TestPermuteAndAnagram(unittest.TestCase):
def test_permute(self):
perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba']
self.assertEqual(perms, permute("abc"))
def test_permute_iter(self):
it = permute_iter("abc")
perms = ['abc', 'bac', 'bca', 'acb', 'cab', 'cba']
for i in range(len(perms)):
self.assertEqual(perms[i], next(it))
def test_angram(self):
self.assertTrue(anagram('apple', 'pleap'))
self.assertFalse(anagram("apple", "cherry"))
class TestArrayCombinationSum(unittest.TestCase):
def test_array_sum_combinations(self):
A = [1, 2, 3, 3]
B = [2, 3, 3, 4]
C = [2, 3, 3, 4]
target = 7
answer = [[1, 2, 4], [1, 3, 3], [1, 3, 3], [1, 3, 3],
[1, 3, 3], [1, 4, 2], [2, 2, 3], [2, 2, 3],
[2, 3, 2], [2, 3, 2], [3, 2, 2], [3, 2, 2]]
answer.sort()
self.assertListEqual(sorted(array_sum_combinations(A, B, C, target)), answer)
def test_unique_array_sum_combinations(self):
A = [1, 2, 3, 3]
B = [2, 3, 3, 4]
C = [2, 3, 3, 4]
target = 7
answer = [(2, 3, 2), (3, 2, 2), (1, 2, 4),
(1, 4, 2), (2, 2, 3), (1, 3, 3)]
answer.sort()
self.assertListEqual(sorted(unique_array_sum_combinations(A, B, C, target)), answer)
class TestCombinationSum(unittest.TestCase):
def check_sum(self, nums, target):
if sum(nums) == target:
return (True, nums)
else:
return (False, nums)
def test_combination_sum(self):
candidates1 = [2, 3, 6, 7]
target1 = 7
answer1 = [
[2, 2, 3],
[7]
]
self.assertEqual(combination_sum(candidates1, target1), answer1)
candidates2 = [2, 3, 5]
target2 = 8
answer2 = [
[2, 2, 2, 2],
[2, 3, 3],
[3, 5]
]
self.assertEqual(combination_sum(candidates2, target2), answer2)
class TestFactorCombinations(unittest.TestCase):
def test_get_factors(self):
target1 = 32
answer1 = [
[2, 16],
[2, 2, 8],
[2, 2, 2, 4],
[2, 2, 2, 2, 2],
[2, 4, 4],
[4, 8]
]
self.assertEqual(sorted(get_factors(target1)), sorted(answer1))
target2 = 12
answer2 = [
[2, 6],
[2, 2, 3],
[3, 4]
]
self.assertEqual(sorted(get_factors(target2)), sorted(answer2))
self.assertEqual(sorted(get_factors(1)), [])
self.assertEqual(sorted(get_factors(37)), [])
def test_recursive_get_factors(self):
target1 = 32
answer1 = [
[2, 16],
[2, 2, 8],
[2, 2, 2, 4],
[2, 2, 2, 2, 2],
[2, 4, 4],
[4, 8]
]
self.assertEqual(sorted(recursive_get_factors(target1)), sorted(answer1))
target2 = 12
answer2 = [
[2, 6],
[2, 2, 3],
[3, 4]
]
self.assertEqual(sorted(recursive_get_factors(target2)), sorted(answer2))
self.assertEqual(sorted(recursive_get_factors(1)), [])
self.assertEqual(sorted(recursive_get_factors(37)), [])
class TestFindWords(unittest.TestCase):
def test_normal(self):
board = [
['o', 'a', 'a', 'n'],
['e', 't', 'a', 'e'],
['i', 'h', 'k', 'r'],
['i', 'f', 'l', 'v']
]
words = ["oath", "pea", "eat", "rain"]
self.assertEqual(find_words(board, words).sort(),
['oath', 'eat'].sort())
def test_none(self):
board = [
['o', 'a', 'a', 'n'],
['e', 't', 'a', 'e'],
['i', 'h', 'k', 'r'],
['i', 'f', 'l', 'v']
]
words = ["chicken", "nugget", "hello", "world"]
self.assertEqual(find_words(board, words), [])
def test_empty(self):
board = []
words = []
self.assertEqual(find_words(board, words), [])
def test_uneven(self):
board = [
['o', 'a', 'a', 'n'],
['e', 't', 'a', 'e']
]
words = ["oath", "pea", "eat", "rain"]
self.assertEqual(find_words(board, words), ['eat'])
def test_repeat(self):
board = [
['a', 'a', 'a'],
['a', 'a', 'a'],
['a', 'a', 'a']
]
words = ["a", "aa", "aaa", "aaaa", "aaaaa"]
self.assertTrue(len(find_words(board, words)) == 5)
class TestGenerateAbbreviations(unittest.TestCase):
def test_generate_abbreviations(self):
word1 = "word"
answer1 = ['word', 'wor1', 'wo1d', 'wo2', 'w1rd', 'w1r1', 'w2d', 'w3',
'1ord', '1or1', '1o1d', '1o2', '2rd', '2r1', '3d', '4']
self.assertEqual(sorted(generate_abbreviations(word1)), sorted(answer1))
word2 = "hello"
answer2 = ['hello', 'hell1', 'hel1o', 'hel2', 'he1lo', 'he1l1', 'he2o',
'he3', 'h1llo', 'h1ll1', 'h1l1o', 'h1l2', 'h2lo', 'h2l1', 'h3o', 'h4',
'1ello', '1ell1', '1el1o', '1el2', '1e1lo', '1e1l1', '1e2o', '1e3',
'2llo', '2ll1', '2l1o', '2l2', '3lo', '3l1', '4o', '5']
self.assertEqual(sorted(generate_abbreviations(word2)), sorted(answer2))
class TestPatternMatch(unittest.TestCase):
def test_pattern_match(self):
pattern1 = "abab"
string1 = "redblueredblue"
pattern2 = "aaaa"
string2 = "asdasdasdasd"
pattern3 = "aabb"
string3 = "xyzabcxzyabc"
self.assertTrue(pattern_match(pattern1, string1))
self.assertTrue(pattern_match(pattern2, string2))
self.assertFalse(pattern_match(pattern3, string3))
class TestGenerateParenthesis(unittest.TestCase):
def test_generate_parenthesis(self):
self.assertEqual(generate_parenthesis_v1(2), ['()()', '(())'])
self.assertEqual(generate_parenthesis_v1(3), ['()()()', '()(())', '(())()', '(()())', '((()))'])
self.assertEqual(generate_parenthesis_v2(2), ['(())', '()()'])
self.assertEqual(generate_parenthesis_v2(3), ['((()))', '(()())', '(())()', '()(())', '()()()'])
class TestLetterCombinations(unittest.TestCase):
def test_letter_combinations(self):
digit1 = "23"
answer1 = ["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"]
self.assertEqual(sorted(letter_combinations(digit1)), sorted(answer1))
digit2 = "34"
answer2 = ['dg', 'dh', 'di', 'eg', 'eh', 'ei', 'fg', 'fh', 'fi']
self.assertEqual(sorted(letter_combinations(digit2)), sorted(answer2))
class TestPalindromicSubstrings(unittest.TestCase):
def test_palindromic_substrings(self):
string1 = "abc"
answer1 = [['a', 'b', 'c']]
self.assertEqual(palindromic_substrings(string1), sorted(answer1))
string2 = "abcba"
answer2 = [['abcba'], ['a', 'bcb', 'a'], ['a', 'b', 'c', 'b', 'a']]
self.assertEqual(sorted(palindromic_substrings(string2)), sorted(answer2))
string3 = "abcccba"
answer3 = [['abcccba'], ['a', 'bcccb', 'a'], ['a', 'b', 'ccc', 'b', 'a'],
['a', 'b', 'cc', 'c', 'b', 'a'], ['a', 'b', 'c', 'cc', 'b', 'a'],
['a', 'b', 'c', 'c', 'c', 'b', 'a']]
self.assertEqual(sorted(palindromic_substrings(string3)), sorted(answer3))
class TestPermuteUnique(unittest.TestCase):
def test_permute_unique(self):
nums1 = [1, 1, 2]
answer1 = [[2, 1, 1], [1, 2, 1], [1, 1, 2]]
self.assertEqual(sorted(permute_unique(nums1)), sorted(answer1))
nums2 = [1, 2, 1, 3]
answer2 = [[3, 1, 2, 1], [1, 3, 2, 1], [1, 2, 3, 1], [1, 2, 1, 3], [3, 2, 1, 1],
[2, 3, 1, 1], [2, 1, 3, 1], [2, 1, 1, 3], [3, 1, 1, 2], [1, 3, 1, 2], [1, 1, 3, 2], [1, 1, 2, 3]]
self.assertEqual(sorted(permute_unique(nums2)), sorted(answer2))
nums3 = [1, 2, 3]
answer3 = [[3, 2, 1], [2, 3, 1], [2, 1, 3], [3, 1, 2], [1, 3, 2], [1, 2, 3]]
self.assertEqual(sorted(permute_unique(nums3)), sorted(answer3))
class TestPermute(unittest.TestCase):
def test_permute(self):
nums1 = [1, 2, 3, 4]
answer1 = [[1, 2, 3, 4], [2, 1, 3, 4], [2, 3, 1, 4], [2, 3, 4, 1], [1, 3, 2, 4],
[3, 1, 2, 4], [3, 2, 1, 4], [3, 2, 4, 1], [1, 3, 4, 2], [3, 1, 4, 2],
[3, 4, 1, 2], [3, 4, 2, 1], [1, 2, 4, 3], [2, 1, 4, 3], [2, 4, 1, 3],
[2, 4, 3, 1], [1, 4, 2, 3], [4, 1, 2, 3], [4, 2, 1, 3], [4, 2, 3, 1],
[1, 4, 3, 2], [4, 1, 3, 2], [4, 3, 1, 2], [4, 3, 2, 1]]
self.assertEqual(sorted(permute(nums1)), sorted(answer1))
nums2 = [1, 2, 3]
answer2 = [[3, 2, 1], [2, 3, 1], [2, 1, 3], [3, 1, 2], [1, 3, 2], [1, 2, 3]]
self.assertEqual(sorted(permute(nums2)), sorted(answer2))
def test_permute_recursive(self):
nums1 = [1, 2, 3, 4]
answer1 = [[1, 2, 3, 4], [2, 1, 3, 4], [2, 3, 1, 4], [2, 3, 4, 1], [1, 3, 2, 4],
[3, 1, 2, 4], [3, 2, 1, 4], [3, 2, 4, 1], [1, 3, 4, 2], [3, 1, 4, 2],
[3, 4, 1, 2], [3, 4, 2, 1], [1, 2, 4, 3], [2, 1, 4, 3], [2, 4, 1, 3],
[2, 4, 3, 1], [1, 4, 2, 3], [4, 1, 2, 3], [4, 2, 1, 3], [4, 2, 3, 1],
[1, 4, 3, 2], [4, 1, 3, 2], [4, 3, 1, 2], [4, 3, 2, 1]]
self.assertEqual(sorted(permute_recursive(nums1)), sorted(answer1))
nums2 = [1, 2, 3]
answer2 = [[3, 2, 1], [2, 3, 1], [2, 1, 3], [3, 1, 2], [1, 3, 2], [1, 2, 3]]
self.assertEqual(sorted(permute_recursive(nums2)), sorted(answer2))
class TestSubsetsUnique(unittest.TestCase):
def test_subsets_unique(self):
nums1 = [1, 2, 2]
answer1 = [(1, 2), (1,), (1, 2, 2), (2,), (), (2, 2)]
self.assertEqual(sorted(subsets_unique(nums1)), sorted(answer1))
nums2 = [1, 2, 3, 4]
answer2 = [(1, 2), (1, 3), (1, 2, 3, 4), (1,), (2,), (3,), (1, 4), (1, 2, 3),
(4,), (), (2, 3), (1, 2, 4), (1, 3, 4), (2, 3, 4), (3, 4), (2, 4)]
self.assertEqual(sorted(subsets_unique(nums2)), sorted(answer2))
class TestSubsets(unittest.TestCase):
def test_subsets(self):
nums1 = [1, 2, 3]
answer1 = [[1, 2, 3], [1, 2], [1, 3], [1], [2, 3], [2], [3], []]
self.assertEqual(sorted(subsets(nums1)), sorted(answer1))
nums2 = [1, 2, 3, 4]
answer2 = [[1, 2, 3, 4], [1, 2, 3], [1, 2, 4], [1, 2], [1, 3, 4],
[1, 3], [1, 4], [1], [2, 3, 4], [2, 3], [2, 4], [2], [3, 4], [3], [4], []]
self.assertEqual(sorted(subsets(nums2)), sorted(answer2))
def test_subsets_v2(self):
nums1 = [1, 2, 3]
answer1 = [[1, 2, 3], [1, 2], [1, 3], [1], [2, 3], [2], [3], []]
self.assertEqual(sorted(subsets_v2(nums1)), sorted(answer1))
nums2 = [1, 2, 3, 4]
answer2 = [[1, 2, 3, 4], [1, 2, 3], [1, 2, 4], [1, 2], [1, 3, 4],
[1, 3], [1, 4], [1], [2, 3, 4], [2, 3], [2, 4], [2], [3, 4], [3], [4], []]
self.assertEqual(sorted(subsets_v2(nums2)), sorted(answer2))
if __name__ == '__main__':
unittest.main()
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