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Stronger tests for combinatoric relationships.

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This commit is contained in:
Raymond Hettinger 2009-01-27 09:52:35 +00:00
parent 2976aaa396
commit f93f3032c6
2 changed files with 9 additions and 1 deletions
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6
Lib/test/test_itertools.py
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@ -281,11 +281,15 @@ class TestBasicOps(unittest.TestCase):
perm = list(permutations(s, r))
comb = list(combinations(s, r))
self.assertEquals(len(prod), len(s)**r)
self.assertEquals(prod, sorted(set(prod))) # prod in lexicographic order without repeats
self.assertEquals(cwr, [t for t in prod if sorted(t)==list(t)]) # cwr: prods which are sorted
self.assertEquals(perm, [t for t in prod if len(set(t))==r]) # perm: prods with no dups
self.assertEqual(comb, [t for t in perm if sorted(t)==list(t)]) # comb: perms that are sorted
self.assertEqual(comb, [t for t in cwr if len(set(t))==r]) # comb: cwrs without dups
self.assertEqual(set(comb), set(cwr) & set(perm)) # comb: both a cwr and a perm
self.assertEqual(comb, filter(set(cwr).__contains__, perm)) # comb: perm that is a cwr
self.assertEqual(comb, filter(set(perm).__contains__, cwr)) # comb: cwr that is a perm
self.assertEqual(comb, sorted(set(cwr) & set(perm))) # comb: both a cwr and a perm
def test_compress(self):
self.assertEqual(list(compress('ABCDEF', [1,0,1,0,1,1])), list('ACEF'))