test_set.py 59 KB
Newer Older
1

2 3
import unittest
from test import test_support
4 5
import gc
import weakref
6 7 8
import operator
import copy
import pickle
9
from random import randrange, shuffle
10
import sys
11
import collections
12 13 14 15 16 17 18 19

class PassThru(Exception):
    pass

def check_pass_thru():
    raise PassThru
    yield 1

20 21 22 23 24 25
class BadCmp:
    def __hash__(self):
        return 1
    def __cmp__(self, other):
        raise RuntimeError

26 27 28 29 30
class ReprWrapper:
    'Used to test self-referential repr() calls'
    def __repr__(self):
        return repr(self.value)

31 32 33 34 35 36 37 38
class HashCountingInt(int):
    'int-like object that counts the number of times __hash__ is called'
    def __init__(self, *args):
        self.hash_count = 0
    def __hash__(self):
        self.hash_count += 1
        return int.__hash__(self)

39 40 41 42 43 44 45 46 47 48
class TestJointOps(unittest.TestCase):
    # Tests common to both set and frozenset

    def setUp(self):
        self.word = word = 'simsalabim'
        self.otherword = 'madagascar'
        self.letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
        self.s = self.thetype(word)
        self.d = dict.fromkeys(word)

49 50
    def test_new_or_init(self):
        self.assertRaises(TypeError, self.thetype, [], 2)
51
        self.assertRaises(TypeError, set().__init__, a=1)
52

53
    def test_uniquification(self):
54 55
        actual = sorted(self.s)
        expected = sorted(self.d)
56 57 58 59 60 61 62 63 64 65 66
        self.assertEqual(actual, expected)
        self.assertRaises(PassThru, self.thetype, check_pass_thru())
        self.assertRaises(TypeError, self.thetype, [[]])

    def test_len(self):
        self.assertEqual(len(self.s), len(self.d))

    def test_contains(self):
        for c in self.letters:
            self.assertEqual(c in self.s, c in self.d)
        self.assertRaises(TypeError, self.s.__contains__, [[]])
67
        s = self.thetype([frozenset(self.letters)])
68
        self.assertIn(self.thetype(self.letters), s)
69 70 71 72 73

    def test_union(self):
        u = self.s.union(self.otherword)
        for c in self.letters:
            self.assertEqual(c in u, c in self.d or c in self.otherword)
74
        self.assertEqual(self.s, self.thetype(self.word))
75 76 77
        self.assertEqual(type(u), self.thetype)
        self.assertRaises(PassThru, self.s.union, check_pass_thru())
        self.assertRaises(TypeError, self.s.union, [[]])
78 79 80 81 82
        for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
            self.assertEqual(self.thetype('abcba').union(C('cdc')), set('abcd'))
            self.assertEqual(self.thetype('abcba').union(C('efgfe')), set('abcefg'))
            self.assertEqual(self.thetype('abcba').union(C('ccb')), set('abc'))
            self.assertEqual(self.thetype('abcba').union(C('ef')), set('abcef'))
83
            self.assertEqual(self.thetype('abcba').union(C('ef'), C('fg')), set('abcefg'))
84

85 86 87 88
        # Issue #6573
        x = self.thetype()
        self.assertEqual(x.union(set([1]), x, set([2])), self.thetype([1, 2]))

89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
    def test_or(self):
        i = self.s.union(self.otherword)
        self.assertEqual(self.s | set(self.otherword), i)
        self.assertEqual(self.s | frozenset(self.otherword), i)
        try:
            self.s | self.otherword
        except TypeError:
            pass
        else:
            self.fail("s|t did not screen-out general iterables")

    def test_intersection(self):
        i = self.s.intersection(self.otherword)
        for c in self.letters:
            self.assertEqual(c in i, c in self.d and c in self.otherword)
104
        self.assertEqual(self.s, self.thetype(self.word))
105 106
        self.assertEqual(type(i), self.thetype)
        self.assertRaises(PassThru, self.s.intersection, check_pass_thru())
107 108 109 110 111
        for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
            self.assertEqual(self.thetype('abcba').intersection(C('cdc')), set('cc'))
            self.assertEqual(self.thetype('abcba').intersection(C('efgfe')), set(''))
            self.assertEqual(self.thetype('abcba').intersection(C('ccb')), set('bc'))
            self.assertEqual(self.thetype('abcba').intersection(C('ef')), set(''))
112
            self.assertEqual(self.thetype('abcba').intersection(C('cbcf'), C('bag')), set('b'))
113 114 115 116 117 118
        s = self.thetype('abcba')
        z = s.intersection()
        if self.thetype == frozenset():
            self.assertEqual(id(s), id(z))
        else:
            self.assertNotEqual(id(s), id(z))
119

Raymond Hettinger's avatar
Raymond Hettinger committed
120 121 122 123 124 125 126 127 128 129 130 131
    def test_isdisjoint(self):
        def f(s1, s2):
            'Pure python equivalent of isdisjoint()'
            return not set(s1).intersection(s2)
        for larg in '', 'a', 'ab', 'abc', 'ababac', 'cdc', 'cc', 'efgfe', 'ccb', 'ef':
            s1 = self.thetype(larg)
            for rarg in '', 'a', 'ab', 'abc', 'ababac', 'cdc', 'cc', 'efgfe', 'ccb', 'ef':
                for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                    s2 = C(rarg)
                    actual = s1.isdisjoint(s2)
                    expected = f(s1, s2)
                    self.assertEqual(actual, expected)
132
                    self.assertTrue(actual is True or actual is False)
Raymond Hettinger's avatar
Raymond Hettinger committed
133

134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
    def test_and(self):
        i = self.s.intersection(self.otherword)
        self.assertEqual(self.s & set(self.otherword), i)
        self.assertEqual(self.s & frozenset(self.otherword), i)
        try:
            self.s & self.otherword
        except TypeError:
            pass
        else:
            self.fail("s&t did not screen-out general iterables")

    def test_difference(self):
        i = self.s.difference(self.otherword)
        for c in self.letters:
            self.assertEqual(c in i, c in self.d and c not in self.otherword)
149
        self.assertEqual(self.s, self.thetype(self.word))
150 151 152
        self.assertEqual(type(i), self.thetype)
        self.assertRaises(PassThru, self.s.difference, check_pass_thru())
        self.assertRaises(TypeError, self.s.difference, [[]])
153 154 155 156 157
        for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
            self.assertEqual(self.thetype('abcba').difference(C('cdc')), set('ab'))
            self.assertEqual(self.thetype('abcba').difference(C('efgfe')), set('abc'))
            self.assertEqual(self.thetype('abcba').difference(C('ccb')), set('a'))
            self.assertEqual(self.thetype('abcba').difference(C('ef')), set('abc'))
158 159
            self.assertEqual(self.thetype('abcba').difference(), set('abc'))
            self.assertEqual(self.thetype('abcba').difference(C('a'), C('b')), set('c'))
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175

    def test_sub(self):
        i = self.s.difference(self.otherword)
        self.assertEqual(self.s - set(self.otherword), i)
        self.assertEqual(self.s - frozenset(self.otherword), i)
        try:
            self.s - self.otherword
        except TypeError:
            pass
        else:
            self.fail("s-t did not screen-out general iterables")

    def test_symmetric_difference(self):
        i = self.s.symmetric_difference(self.otherword)
        for c in self.letters:
            self.assertEqual(c in i, (c in self.d) ^ (c in self.otherword))
176
        self.assertEqual(self.s, self.thetype(self.word))
177 178 179
        self.assertEqual(type(i), self.thetype)
        self.assertRaises(PassThru, self.s.symmetric_difference, check_pass_thru())
        self.assertRaises(TypeError, self.s.symmetric_difference, [[]])
180 181 182 183 184
        for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
            self.assertEqual(self.thetype('abcba').symmetric_difference(C('cdc')), set('abd'))
            self.assertEqual(self.thetype('abcba').symmetric_difference(C('efgfe')), set('abcefg'))
            self.assertEqual(self.thetype('abcba').symmetric_difference(C('ccb')), set('a'))
            self.assertEqual(self.thetype('abcba').symmetric_difference(C('ef')), set('abcef'))
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214

    def test_xor(self):
        i = self.s.symmetric_difference(self.otherword)
        self.assertEqual(self.s ^ set(self.otherword), i)
        self.assertEqual(self.s ^ frozenset(self.otherword), i)
        try:
            self.s ^ self.otherword
        except TypeError:
            pass
        else:
            self.fail("s^t did not screen-out general iterables")

    def test_equality(self):
        self.assertEqual(self.s, set(self.word))
        self.assertEqual(self.s, frozenset(self.word))
        self.assertEqual(self.s == self.word, False)
        self.assertNotEqual(self.s, set(self.otherword))
        self.assertNotEqual(self.s, frozenset(self.otherword))
        self.assertEqual(self.s != self.word, True)

    def test_setOfFrozensets(self):
        t = map(frozenset, ['abcdef', 'bcd', 'bdcb', 'fed', 'fedccba'])
        s = self.thetype(t)
        self.assertEqual(len(s), 3)

    def test_compare(self):
        self.assertRaises(TypeError, self.s.__cmp__, self.s)

    def test_sub_and_super(self):
        p, q, r = map(self.thetype, ['ab', 'abcde', 'def'])
215 216 217 218 219 220 221 222 223 224 225 226 227
        self.assertTrue(p < q)
        self.assertTrue(p <= q)
        self.assertTrue(q <= q)
        self.assertTrue(q > p)
        self.assertTrue(q >= p)
        self.assertFalse(q < r)
        self.assertFalse(q <= r)
        self.assertFalse(q > r)
        self.assertFalse(q >= r)
        self.assertTrue(set('a').issubset('abc'))
        self.assertTrue(set('abc').issuperset('a'))
        self.assertFalse(set('a').issubset('cbs'))
        self.assertFalse(set('cbs').issuperset('a'))
228 229

    def test_pickling(self):
230
        for i in range(pickle.HIGHEST_PROTOCOL + 1):
231 232 233 234 235 236 237 238
            p = pickle.dumps(self.s, i)
            dup = pickle.loads(p)
            self.assertEqual(self.s, dup, "%s != %s" % (self.s, dup))
            if type(self.s) not in (set, frozenset):
                self.s.x = 10
                p = pickle.dumps(self.s)
                dup = pickle.loads(p)
                self.assertEqual(self.s.x, dup.x)
239

240 241 242 243 244
    def test_deepcopy(self):
        class Tracer:
            def __init__(self, value):
                self.value = value
            def __hash__(self):
Tim Peters's avatar
Tim Peters committed
245
                return self.value
246 247 248 249 250 251 252 253 254 255 256
            def __deepcopy__(self, memo=None):
                return Tracer(self.value + 1)
        t = Tracer(10)
        s = self.thetype([t])
        dup = copy.deepcopy(s)
        self.assertNotEqual(id(s), id(dup))
        for elem in dup:
            newt = elem
        self.assertNotEqual(id(t), id(newt))
        self.assertEqual(t.value + 1, newt.value)

257 258 259 260 261 262 263 264 265 266
    def test_gc(self):
        # Create a nest of cycles to exercise overall ref count check
        class A:
            pass
        s = set(A() for i in xrange(1000))
        for elem in s:
            elem.cycle = s
            elem.sub = elem
            elem.set = set([elem])

267 268 269 270
    def test_subclass_with_custom_hash(self):
        # Bug #1257731
        class H(self.thetype):
            def __hash__(self):
271
                return int(id(self) & 0x7fffffff)
272 273 274
        s=H()
        f=set()
        f.add(s)
275
        self.assertIn(s, f)
276 277 278 279
        f.remove(s)
        f.add(s)
        f.discard(s)

280 281 282 283 284 285 286 287 288 289 290
    def test_badcmp(self):
        s = self.thetype([BadCmp()])
        # Detect comparison errors during insertion and lookup
        self.assertRaises(RuntimeError, self.thetype, [BadCmp(), BadCmp()])
        self.assertRaises(RuntimeError, s.__contains__, BadCmp())
        # Detect errors during mutating operations
        if hasattr(s, 'add'):
            self.assertRaises(RuntimeError, s.add, BadCmp())
            self.assertRaises(RuntimeError, s.discard, BadCmp())
            self.assertRaises(RuntimeError, s.remove, BadCmp())

291 292 293 294 295 296 297 298 299 300 301
    def test_cyclical_repr(self):
        w = ReprWrapper()
        s = self.thetype([w])
        w.value = s
        name = repr(s).partition('(')[0]    # strip class name from repr string
        self.assertEqual(repr(s), '%s([%s(...)])' % (name, name))

    def test_cyclical_print(self):
        w = ReprWrapper()
        s = self.thetype([w])
        w.value = s
302
        fo = open(test_support.TESTFN, "wb")
303 304 305 306 307 308 309
        try:
            print >> fo, s,
            fo.close()
            fo = open(test_support.TESTFN, "rb")
            self.assertEqual(fo.read(), repr(s))
        finally:
            fo.close()
310
            test_support.unlink(test_support.TESTFN)
311

312 313 314 315 316 317 318
    def test_do_not_rehash_dict_keys(self):
        n = 10
        d = dict.fromkeys(map(HashCountingInt, xrange(n)))
        self.assertEqual(sum(elem.hash_count for elem in d), n)
        s = self.thetype(d)
        self.assertEqual(sum(elem.hash_count for elem in d), n)
        s.difference(d)
Tim Peters's avatar
Tim Peters committed
319
        self.assertEqual(sum(elem.hash_count for elem in d), n)
320 321
        if hasattr(s, 'symmetric_difference_update'):
            s.symmetric_difference_update(d)
322
        self.assertEqual(sum(elem.hash_count for elem in d), n)
323 324 325
        d2 = dict.fromkeys(set(d))
        self.assertEqual(sum(elem.hash_count for elem in d), n)
        d3 = dict.fromkeys(frozenset(d))
Tim Peters's avatar
Tim Peters committed
326
        self.assertEqual(sum(elem.hash_count for elem in d), n)
327 328 329
        d3 = dict.fromkeys(frozenset(d), 123)
        self.assertEqual(sum(elem.hash_count for elem in d), n)
        self.assertEqual(d3, dict.fromkeys(d, 123))
330

331
    def test_container_iterator(self):
332
        # Bug #3680: tp_traverse was not implemented for set iterator object
333 334 335 336 337 338 339 340
        class C(object):
            pass
        obj = C()
        ref = weakref.ref(obj)
        container = set([obj, 1])
        obj.x = iter(container)
        del obj, container
        gc.collect()
341
        self.assertTrue(ref() is None, "Cycle was not collected")
342

343 344 345
class TestSet(TestJointOps):
    thetype = set

346
    def test_init(self):
347
        s = self.thetype()
348 349 350 351
        s.__init__(self.word)
        self.assertEqual(s, set(self.word))
        s.__init__(self.otherword)
        self.assertEqual(s, set(self.otherword))
Raymond Hettinger's avatar
Raymond Hettinger committed
352 353
        self.assertRaises(TypeError, s.__init__, s, 2);
        self.assertRaises(TypeError, s.__init__, 1);
354

355 356 357 358 359
    def test_constructor_identity(self):
        s = self.thetype(range(3))
        t = self.thetype(s)
        self.assertNotEqual(id(s), id(t))

360 361 362 363 364
    def test_hash(self):
        self.assertRaises(TypeError, hash, self.s)

    def test_clear(self):
        self.s.clear()
365 366
        self.assertEqual(self.s, set())
        self.assertEqual(len(self.s), 0)
367

368 369 370 371 372
    def test_copy(self):
        dup = self.s.copy()
        self.assertEqual(self.s, dup)
        self.assertNotEqual(id(self.s), id(dup))

373 374
    def test_add(self):
        self.s.add('Q')
375
        self.assertIn('Q', self.s)
376 377 378
        dup = self.s.copy()
        self.s.add('Q')
        self.assertEqual(self.s, dup)
379 380 381 382
        self.assertRaises(TypeError, self.s.add, [])

    def test_remove(self):
        self.s.remove('a')
383
        self.assertNotIn('a', self.s)
384 385
        self.assertRaises(KeyError, self.s.remove, 'Q')
        self.assertRaises(TypeError, self.s.remove, [])
386
        s = self.thetype([frozenset(self.word)])
387
        self.assertIn(self.thetype(self.word), s)
388
        s.remove(self.thetype(self.word))
389
        self.assertNotIn(self.thetype(self.word), s)
390
        self.assertRaises(KeyError, self.s.remove, self.thetype(self.word))
391

392 393 394 395 396 397 398 399 400 401 402
    def test_remove_keyerror_unpacking(self):
        # bug:  www.python.org/sf/1576657
        for v1 in ['Q', (1,)]:
            try:
                self.s.remove(v1)
            except KeyError, e:
                v2 = e.args[0]
                self.assertEqual(v1, v2)
            else:
                self.fail()

403 404 405 406 407
    def test_remove_keyerror_set(self):
        key = self.thetype([3, 4])
        try:
            self.s.remove(key)
        except KeyError as e:
408
            self.assertTrue(e.args[0] is key,
409 410 411 412 413
                         "KeyError should be {0}, not {1}".format(key,
                                                                  e.args[0]))
        else:
            self.fail()

414 415
    def test_discard(self):
        self.s.discard('a')
416
        self.assertNotIn('a', self.s)
417 418
        self.s.discard('Q')
        self.assertRaises(TypeError, self.s.discard, [])
419
        s = self.thetype([frozenset(self.word)])
420
        self.assertIn(self.thetype(self.word), s)
421
        s.discard(self.thetype(self.word))
422
        self.assertNotIn(self.thetype(self.word), s)
423
        s.discard(self.thetype(self.word))
424 425 426 427

    def test_pop(self):
        for i in xrange(len(self.s)):
            elem = self.s.pop()
428
            self.assertNotIn(elem, self.s)
429 430
        self.assertRaises(KeyError, self.s.pop)

431 432
    def test_update(self):
        retval = self.s.update(self.otherword)
433 434
        self.assertEqual(retval, None)
        for c in (self.word + self.otherword):
435
            self.assertIn(c, self.s)
436 437 438 439 440 441 442
        self.assertRaises(PassThru, self.s.update, check_pass_thru())
        self.assertRaises(TypeError, self.s.update, [[]])
        for p, q in (('cdc', 'abcd'), ('efgfe', 'abcefg'), ('ccb', 'abc'), ('ef', 'abcef')):
            for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                s = self.thetype('abcba')
                self.assertEqual(s.update(C(p)), None)
                self.assertEqual(s, set(q))
443 444 445 446 447 448
        for p in ('cdc', 'efgfe', 'ccb', 'ef', 'abcda'):
            q = 'ahi'
            for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                s = self.thetype('abcba')
                self.assertEqual(s.update(C(p), C(q)), None)
                self.assertEqual(s, set(s) | set(p) | set(q))
449 450 451 452

    def test_ior(self):
        self.s |= set(self.otherword)
        for c in (self.word + self.otherword):
453
            self.assertIn(c, self.s)
454 455 456 457 458 459

    def test_intersection_update(self):
        retval = self.s.intersection_update(self.otherword)
        self.assertEqual(retval, None)
        for c in (self.word + self.otherword):
            if c in self.otherword and c in self.word:
460
                self.assertIn(c, self.s)
461
            else:
462
                self.assertNotIn(c, self.s)
463 464
        self.assertRaises(PassThru, self.s.intersection_update, check_pass_thru())
        self.assertRaises(TypeError, self.s.intersection_update, [[]])
465 466 467 468 469
        for p, q in (('cdc', 'c'), ('efgfe', ''), ('ccb', 'bc'), ('ef', '')):
            for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                s = self.thetype('abcba')
                self.assertEqual(s.intersection_update(C(p)), None)
                self.assertEqual(s, set(q))
470 471 472 473 474
                ss = 'abcba'
                s = self.thetype(ss)
                t = 'cbc'
                self.assertEqual(s.intersection_update(C(p), C(t)), None)
                self.assertEqual(s, set('abcba')&set(p)&set(t))
475 476 477 478 479

    def test_iand(self):
        self.s &= set(self.otherword)
        for c in (self.word + self.otherword):
            if c in self.otherword and c in self.word:
480
                self.assertIn(c, self.s)
481
            else:
482
                self.assertNotIn(c, self.s)
483 484 485 486 487 488

    def test_difference_update(self):
        retval = self.s.difference_update(self.otherword)
        self.assertEqual(retval, None)
        for c in (self.word + self.otherword):
            if c in self.word and c not in self.otherword:
489
                self.assertIn(c, self.s)
490
            else:
491
                self.assertNotIn(c, self.s)
492 493
        self.assertRaises(PassThru, self.s.difference_update, check_pass_thru())
        self.assertRaises(TypeError, self.s.difference_update, [[]])
494 495 496 497 498 499
        self.assertRaises(TypeError, self.s.symmetric_difference_update, [[]])
        for p, q in (('cdc', 'ab'), ('efgfe', 'abc'), ('ccb', 'a'), ('ef', 'abc')):
            for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                s = self.thetype('abcba')
                self.assertEqual(s.difference_update(C(p)), None)
                self.assertEqual(s, set(q))
500

501 502 503 504 505 506 507 508 509 510 511 512
                s = self.thetype('abcdefghih')
                s.difference_update()
                self.assertEqual(s, self.thetype('abcdefghih'))

                s = self.thetype('abcdefghih')
                s.difference_update(C('aba'))
                self.assertEqual(s, self.thetype('cdefghih'))

                s = self.thetype('abcdefghih')
                s.difference_update(C('cdc'), C('aba'))
                self.assertEqual(s, self.thetype('efghih'))

513 514 515 516
    def test_isub(self):
        self.s -= set(self.otherword)
        for c in (self.word + self.otherword):
            if c in self.word and c not in self.otherword:
517
                self.assertIn(c, self.s)
518
            else:
519
                self.assertNotIn(c, self.s)
520 521 522 523 524 525

    def test_symmetric_difference_update(self):
        retval = self.s.symmetric_difference_update(self.otherword)
        self.assertEqual(retval, None)
        for c in (self.word + self.otherword):
            if (c in self.word) ^ (c in self.otherword):
526
                self.assertIn(c, self.s)
527
            else:
528
                self.assertNotIn(c, self.s)
529 530
        self.assertRaises(PassThru, self.s.symmetric_difference_update, check_pass_thru())
        self.assertRaises(TypeError, self.s.symmetric_difference_update, [[]])
531 532 533 534 535
        for p, q in (('cdc', 'abd'), ('efgfe', 'abcefg'), ('ccb', 'a'), ('ef', 'abcef')):
            for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
                s = self.thetype('abcba')
                self.assertEqual(s.symmetric_difference_update(C(p)), None)
                self.assertEqual(s, set(q))
536 537 538 539 540

    def test_ixor(self):
        self.s ^= set(self.otherword)
        for c in (self.word + self.otherword):
            if (c in self.word) ^ (c in self.otherword):
541
                self.assertIn(c, self.s)
542
            else:
543
                self.assertNotIn(c, self.s)
544

545 546 547 548 549 550 551 552 553 554 555 556
    def test_inplace_on_self(self):
        t = self.s.copy()
        t |= t
        self.assertEqual(t, self.s)
        t &= t
        self.assertEqual(t, self.s)
        t -= t
        self.assertEqual(t, self.thetype())
        t = self.s.copy()
        t ^= t
        self.assertEqual(t, self.thetype())

557 558
    def test_weakref(self):
        s = self.thetype('gallahad')
559
        p = weakref.proxy(s)
560 561 562 563
        self.assertEqual(str(p), str(s))
        s = None
        self.assertRaises(ReferenceError, str, p)

564
    # C API test only available in a debug build
565
    if hasattr(set, "test_c_api"):
566
        def test_c_api(self):
567
            self.assertEqual(set().test_c_api(), True)
568

569 570 571 572 573
class SetSubclass(set):
    pass

class TestSetSubclass(TestSet):
    thetype = SetSubclass
574

575 576 577 578 579
class SetSubclassWithKeywordArgs(set):
    def __init__(self, iterable=[], newarg=None):
        set.__init__(self, iterable)

class TestSetSubclassWithKeywordArgs(TestSet):
Tim Peters's avatar
Tim Peters committed
580

581 582 583 584
    def test_keywords_in_subclass(self):
        'SF bug #1486663 -- this used to erroneously raise a TypeError'
        SetSubclassWithKeywordArgs(newarg=1)

585 586 587
class TestFrozenSet(TestJointOps):
    thetype = frozenset

588
    def test_init(self):
589 590 591 592
        s = self.thetype(self.word)
        s.__init__(self.otherword)
        self.assertEqual(s, set(self.word))

593 594 595 596 597 598 599 600 601
    def test_singleton_empty_frozenset(self):
        f = frozenset()
        efs = [frozenset(), frozenset([]), frozenset(()), frozenset(''),
               frozenset(), frozenset([]), frozenset(()), frozenset(''),
               frozenset(xrange(0)), frozenset(frozenset()),
               frozenset(f), f]
        # All of the empty frozensets should have just one id()
        self.assertEqual(len(set(map(id, efs))), 1)

602 603 604 605
    def test_constructor_identity(self):
        s = self.thetype(range(3))
        t = self.thetype(s)
        self.assertEqual(id(s), id(t))
606

607
    def test_hash(self):
608 609 610
        self.assertEqual(hash(self.thetype('abcdeb')),
                         hash(self.thetype('ebecda')))

611 612 613 614 615 616 617 618 619
        # make sure that all permutations give the same hash value
        n = 100
        seq = [randrange(n) for i in xrange(n)]
        results = set()
        for i in xrange(200):
            shuffle(seq)
            results.add(hash(self.thetype(seq)))
        self.assertEqual(len(results), 1)

620 621 622
    def test_copy(self):
        dup = self.s.copy()
        self.assertEqual(id(self.s), id(dup))
623 624 625

    def test_frozen_as_dictkey(self):
        seq = range(10) + list('abcdefg') + ['apple']
626 627
        key1 = self.thetype(seq)
        key2 = self.thetype(reversed(seq))
628 629 630 631 632 633 634
        self.assertEqual(key1, key2)
        self.assertNotEqual(id(key1), id(key2))
        d = {}
        d[key1] = 42
        self.assertEqual(d[key2], 42)

    def test_hash_caching(self):
635
        f = self.thetype('abcdcda')
636 637
        self.assertEqual(hash(f), hash(f))

638 639 640
    def test_hash_effectiveness(self):
        n = 13
        hashvalues = set()
641 642
        addhashvalue = hashvalues.add
        elemmasks = [(i+1, 1<<i) for i in range(n)]
643
        for i in xrange(2**n):
644 645
            addhashvalue(hash(frozenset([e for e, m in elemmasks if m&i])))
        self.assertEqual(len(hashvalues), 2**n)
646

647 648 649 650 651 652
class FrozenSetSubclass(frozenset):
    pass

class TestFrozenSetSubclass(TestFrozenSet):
    thetype = FrozenSetSubclass

653 654 655 656 657 658 659 660 661 662 663 664 665 666
    def test_constructor_identity(self):
        s = self.thetype(range(3))
        t = self.thetype(s)
        self.assertNotEqual(id(s), id(t))

    def test_copy(self):
        dup = self.s.copy()
        self.assertNotEqual(id(self.s), id(dup))

    def test_nested_empty_constructor(self):
        s = self.thetype()
        t = self.thetype(s)
        self.assertEqual(s, t)

667 668 669 670 671 672 673 674 675 676 677
    def test_singleton_empty_frozenset(self):
        Frozenset = self.thetype
        f = frozenset()
        F = Frozenset()
        efs = [Frozenset(), Frozenset([]), Frozenset(()), Frozenset(''),
               Frozenset(), Frozenset([]), Frozenset(()), Frozenset(''),
               Frozenset(xrange(0)), Frozenset(Frozenset()),
               Frozenset(frozenset()), f, F, Frozenset(f), Frozenset(F)]
        # All empty frozenset subclass instances should have different ids
        self.assertEqual(len(set(map(id, efs))), len(efs))

678 679 680 681 682 683 684 685 686 687
# Tests taken from test_sets.py =============================================

empty_set = set()

#==============================================================================

class TestBasicOps(unittest.TestCase):

    def test_repr(self):
        if self.repr is not None:
688
            self.assertEqual(repr(self.set), self.repr)
689

Raymond Hettinger's avatar
Raymond Hettinger committed
690
    def test_print(self):
691
        fo = open(test_support.TESTFN, "wb")
Raymond Hettinger's avatar
Raymond Hettinger committed
692 693 694 695 696 697 698
        try:
            print >> fo, self.set,
            fo.close()
            fo = open(test_support.TESTFN, "rb")
            self.assertEqual(fo.read(), repr(self.set))
        finally:
            fo.close()
699
            test_support.unlink(test_support.TESTFN)
Raymond Hettinger's avatar
Raymond Hettinger committed
700

701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
    def test_length(self):
        self.assertEqual(len(self.set), self.length)

    def test_self_equality(self):
        self.assertEqual(self.set, self.set)

    def test_equivalent_equality(self):
        self.assertEqual(self.set, self.dup)

    def test_copy(self):
        self.assertEqual(self.set.copy(), self.dup)

    def test_self_union(self):
        result = self.set | self.set
        self.assertEqual(result, self.dup)

    def test_empty_union(self):
        result = self.set | empty_set
        self.assertEqual(result, self.dup)

    def test_union_empty(self):
        result = empty_set | self.set
        self.assertEqual(result, self.dup)

    def test_self_intersection(self):
        result = self.set & self.set
        self.assertEqual(result, self.dup)

    def test_empty_intersection(self):
        result = self.set & empty_set
        self.assertEqual(result, empty_set)

    def test_intersection_empty(self):
        result = empty_set & self.set
        self.assertEqual(result, empty_set)

Raymond Hettinger's avatar
Raymond Hettinger committed
737 738 739 740 741 742 743 744 745 746 747 748
    def test_self_isdisjoint(self):
        result = self.set.isdisjoint(self.set)
        self.assertEqual(result, not self.set)

    def test_empty_isdisjoint(self):
        result = self.set.isdisjoint(empty_set)
        self.assertEqual(result, True)

    def test_isdisjoint_empty(self):
        result = empty_set.isdisjoint(self.set)
        self.assertEqual(result, True)

749 750 751 752
    def test_self_symmetric_difference(self):
        result = self.set ^ self.set
        self.assertEqual(result, empty_set)

753
    def test_empty_symmetric_difference(self):
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
        result = self.set ^ empty_set
        self.assertEqual(result, self.set)

    def test_self_difference(self):
        result = self.set - self.set
        self.assertEqual(result, empty_set)

    def test_empty_difference(self):
        result = self.set - empty_set
        self.assertEqual(result, self.dup)

    def test_empty_difference_rev(self):
        result = empty_set - self.set
        self.assertEqual(result, empty_set)

    def test_iteration(self):
        for v in self.set:
771
            self.assertIn(v, self.values)
772
        setiter = iter(self.set)
773 774 775
        # note: __length_hint__ is an internal undocumented API,
        # don't rely on it in your own programs
        self.assertEqual(setiter.__length_hint__(), len(self.set))
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805

    def test_pickling(self):
        p = pickle.dumps(self.set)
        copy = pickle.loads(p)
        self.assertEqual(self.set, copy,
                         "%s != %s" % (self.set, copy))

#------------------------------------------------------------------------------

class TestBasicOpsEmpty(TestBasicOps):
    def setUp(self):
        self.case   = "empty set"
        self.values = []
        self.set    = set(self.values)
        self.dup    = set(self.values)
        self.length = 0
        self.repr   = "set([])"

#------------------------------------------------------------------------------

class TestBasicOpsSingleton(TestBasicOps):
    def setUp(self):
        self.case   = "unit set (number)"
        self.values = [3]
        self.set    = set(self.values)
        self.dup    = set(self.values)
        self.length = 1
        self.repr   = "set([3])"

    def test_in(self):
806
        self.assertIn(3, self.set)
807 808

    def test_not_in(self):
809
        self.assertNotIn(2, self.set)
810 811 812 813 814 815 816 817 818 819 820 821 822

#------------------------------------------------------------------------------

class TestBasicOpsTuple(TestBasicOps):
    def setUp(self):
        self.case   = "unit set (tuple)"
        self.values = [(0, "zero")]
        self.set    = set(self.values)
        self.dup    = set(self.values)
        self.length = 1
        self.repr   = "set([(0, 'zero')])"

    def test_in(self):
823
        self.assertIn((0, "zero"), self.set)
824 825

    def test_not_in(self):
826
        self.assertNotIn(9, self.set)
827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862

#------------------------------------------------------------------------------

class TestBasicOpsTriple(TestBasicOps):
    def setUp(self):
        self.case   = "triple set"
        self.values = [0, "zero", operator.add]
        self.set    = set(self.values)
        self.dup    = set(self.values)
        self.length = 3
        self.repr   = None

#==============================================================================

def baditer():
    raise TypeError
    yield True

def gooditer():
    yield True

class TestExceptionPropagation(unittest.TestCase):
    """SF 628246:  Set constructor should not trap iterator TypeErrors"""

    def test_instanceWithException(self):
        self.assertRaises(TypeError, set, baditer())

    def test_instancesWithoutException(self):
        # All of these iterables should load without exception.
        set([1,2,3])
        set((1,2,3))
        set({'one':1, 'two':2, 'three':3})
        set(xrange(3))
        set('abc')
        set(gooditer())

863 864 865 866 867 868 869 870 871 872
    def test_changingSizeWhileIterating(self):
        s = set([1,2,3])
        try:
            for i in s:
                s.update([4])
        except RuntimeError:
            pass
        else:
            self.fail("no exception when changing size during iteration")

873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
#==============================================================================

class TestSetOfSets(unittest.TestCase):
    def test_constructor(self):
        inner = frozenset([1])
        outer = set([inner])
        element = outer.pop()
        self.assertEqual(type(element), frozenset)
        outer.add(inner)        # Rebuild set of sets with .add method
        outer.remove(inner)
        self.assertEqual(outer, set())   # Verify that remove worked
        outer.discard(inner)    # Absence of KeyError indicates working fine

#==============================================================================

class TestBinaryOps(unittest.TestCase):
    def setUp(self):
        self.set = set((2, 4, 6))

    def test_eq(self):              # SF bug 643115
        self.assertEqual(self.set, set({2:1,4:3,6:5}))

    def test_union_subset(self):
        result = self.set | set([2])
        self.assertEqual(result, set((2, 4, 6)))

    def test_union_superset(self):
        result = self.set | set([2, 4, 6, 8])
        self.assertEqual(result, set([2, 4, 6, 8]))

    def test_union_overlap(self):
        result = self.set | set([3, 4, 5])
        self.assertEqual(result, set([2, 3, 4, 5, 6]))

    def test_union_non_overlap(self):
        result = self.set | set([8])
        self.assertEqual(result, set([2, 4, 6, 8]))

    def test_intersection_subset(self):
        result = self.set & set((2, 4))
        self.assertEqual(result, set((2, 4)))

    def test_intersection_superset(self):
        result = self.set & set([2, 4, 6, 8])
        self.assertEqual(result, set([2, 4, 6]))

    def test_intersection_overlap(self):
        result = self.set & set([3, 4, 5])
        self.assertEqual(result, set([4]))

    def test_intersection_non_overlap(self):
        result = self.set & set([8])
        self.assertEqual(result, empty_set)

Raymond Hettinger's avatar
Raymond Hettinger committed
927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942
    def test_isdisjoint_subset(self):
        result = self.set.isdisjoint(set((2, 4)))
        self.assertEqual(result, False)

    def test_isdisjoint_superset(self):
        result = self.set.isdisjoint(set([2, 4, 6, 8]))
        self.assertEqual(result, False)

    def test_isdisjoint_overlap(self):
        result = self.set.isdisjoint(set([3, 4, 5]))
        self.assertEqual(result, False)

    def test_isdisjoint_non_overlap(self):
        result = self.set.isdisjoint(set([8]))
        self.assertEqual(result, True)

943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994
    def test_sym_difference_subset(self):
        result = self.set ^ set((2, 4))
        self.assertEqual(result, set([6]))

    def test_sym_difference_superset(self):
        result = self.set ^ set((2, 4, 6, 8))
        self.assertEqual(result, set([8]))

    def test_sym_difference_overlap(self):
        result = self.set ^ set((3, 4, 5))
        self.assertEqual(result, set([2, 3, 5, 6]))

    def test_sym_difference_non_overlap(self):
        result = self.set ^ set([8])
        self.assertEqual(result, set([2, 4, 6, 8]))

    def test_cmp(self):
        a, b = set('a'), set('b')
        self.assertRaises(TypeError, cmp, a, b)

        # You can view this as a buglet:  cmp(a, a) does not raise TypeError,
        # because __eq__ is tried before __cmp__, and a.__eq__(a) returns True,
        # which Python thinks is good enough to synthesize a cmp() result
        # without calling __cmp__.
        self.assertEqual(cmp(a, a), 0)

        self.assertRaises(TypeError, cmp, a, 12)
        self.assertRaises(TypeError, cmp, "abc", a)

#==============================================================================

class TestUpdateOps(unittest.TestCase):
    def setUp(self):
        self.set = set((2, 4, 6))

    def test_union_subset(self):
        self.set |= set([2])
        self.assertEqual(self.set, set((2, 4, 6)))

    def test_union_superset(self):
        self.set |= set([2, 4, 6, 8])
        self.assertEqual(self.set, set([2, 4, 6, 8]))

    def test_union_overlap(self):
        self.set |= set([3, 4, 5])
        self.assertEqual(self.set, set([2, 3, 4, 5, 6]))

    def test_union_non_overlap(self):
        self.set |= set([8])
        self.assertEqual(self.set, set([2, 4, 6, 8]))

    def test_union_method_call(self):
995
        self.set.update(set([3, 4, 5]))
996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
        self.assertEqual(self.set, set([2, 3, 4, 5, 6]))

    def test_intersection_subset(self):
        self.set &= set((2, 4))
        self.assertEqual(self.set, set((2, 4)))

    def test_intersection_superset(self):
        self.set &= set([2, 4, 6, 8])
        self.assertEqual(self.set, set([2, 4, 6]))

    def test_intersection_overlap(self):
        self.set &= set([3, 4, 5])
        self.assertEqual(self.set, set([4]))

    def test_intersection_non_overlap(self):
        self.set &= set([8])
        self.assertEqual(self.set, empty_set)

    def test_intersection_method_call(self):
        self.set.intersection_update(set([3, 4, 5]))
        self.assertEqual(self.set, set([4]))

    def test_sym_difference_subset(self):
        self.set ^= set((2, 4))
        self.assertEqual(self.set, set([6]))

    def test_sym_difference_superset(self):
        self.set ^= set((2, 4, 6, 8))
        self.assertEqual(self.set, set([8]))

    def test_sym_difference_overlap(self):
        self.set ^= set((3, 4, 5))
        self.assertEqual(self.set, set([2, 3, 5, 6]))

    def test_sym_difference_non_overlap(self):
        self.set ^= set([8])
        self.assertEqual(self.set, set([2, 4, 6, 8]))

    def test_sym_difference_method_call(self):
        self.set.symmetric_difference_update(set([3, 4, 5]))
        self.assertEqual(self.set, set([2, 3, 5, 6]))

    def test_difference_subset(self):
        self.set -= set((2, 4))
        self.assertEqual(self.set, set([6]))

    def test_difference_superset(self):
        self.set -= set((2, 4, 6, 8))
        self.assertEqual(self.set, set([]))

    def test_difference_overlap(self):
        self.set -= set((3, 4, 5))
        self.assertEqual(self.set, set([2, 6]))

    def test_difference_non_overlap(self):
        self.set -= set([8])
        self.assertEqual(self.set, set([2, 4, 6]))

    def test_difference_method_call(self):
        self.set.difference_update(set([3, 4, 5]))
        self.assertEqual(self.set, set([2, 6]))

#==============================================================================

class TestMutate(unittest.TestCase):
    def setUp(self):
        self.values = ["a", "b", "c"]
        self.set = set(self.values)

    def test_add_present(self):
        self.set.add("c")
        self.assertEqual(self.set, set("abc"))

    def test_add_absent(self):
        self.set.add("d")
        self.assertEqual(self.set, set("abcd"))

    def test_add_until_full(self):
        tmp = set()
        expected_len = 0
        for v in self.values:
            tmp.add(v)
            expected_len += 1
            self.assertEqual(len(tmp), expected_len)
        self.assertEqual(tmp, self.set)

    def test_remove_present(self):
        self.set.remove("b")
        self.assertEqual(self.set, set("ac"))

    def test_remove_absent(self):
        try:
            self.set.remove("d")
            self.fail("Removing missing element should have raised LookupError")
        except LookupError:
            pass

    def test_remove_until_empty(self):
        expected_len = len(self.set)
        for v in self.values:
            self.set.remove(v)
            expected_len -= 1
            self.assertEqual(len(self.set), expected_len)

    def test_discard_present(self):
        self.set.discard("c")
        self.assertEqual(self.set, set("ab"))

    def test_discard_absent(self):
        self.set.discard("d")
        self.assertEqual(self.set, set("abc"))

    def test_clear(self):
        self.set.clear()
        self.assertEqual(len(self.set), 0)

    def test_pop(self):
        popped = {}
        while self.set:
            popped[self.set.pop()] = None
        self.assertEqual(len(popped), len(self.values))
        for v in self.values:
1118
            self.assertIn(v, popped)
1119 1120

    def test_update_empty_tuple(self):
1121
        self.set.update(())
1122 1123 1124
        self.assertEqual(self.set, set(self.values))

    def test_update_unit_tuple_overlap(self):
1125
        self.set.update(("a",))
1126 1127 1128
        self.assertEqual(self.set, set(self.values))

    def test_update_unit_tuple_non_overlap(self):
1129
        self.set.update(("a", "z"))
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221
        self.assertEqual(self.set, set(self.values + ["z"]))

#==============================================================================

class TestSubsets(unittest.TestCase):

    case2method = {"<=": "issubset",
                   ">=": "issuperset",
                  }

    reverse = {"==": "==",
               "!=": "!=",
               "<":  ">",
               ">":  "<",
               "<=": ">=",
               ">=": "<=",
              }

    def test_issubset(self):
        x = self.left
        y = self.right
        for case in "!=", "==", "<", "<=", ">", ">=":
            expected = case in self.cases
            # Test the binary infix spelling.
            result = eval("x" + case + "y", locals())
            self.assertEqual(result, expected)
            # Test the "friendly" method-name spelling, if one exists.
            if case in TestSubsets.case2method:
                method = getattr(x, TestSubsets.case2method[case])
                result = method(y)
                self.assertEqual(result, expected)

            # Now do the same for the operands reversed.
            rcase = TestSubsets.reverse[case]
            result = eval("y" + rcase + "x", locals())
            self.assertEqual(result, expected)
            if rcase in TestSubsets.case2method:
                method = getattr(y, TestSubsets.case2method[rcase])
                result = method(x)
                self.assertEqual(result, expected)
#------------------------------------------------------------------------------

class TestSubsetEqualEmpty(TestSubsets):
    left  = set()
    right = set()
    name  = "both empty"
    cases = "==", "<=", ">="

#------------------------------------------------------------------------------

class TestSubsetEqualNonEmpty(TestSubsets):
    left  = set([1, 2])
    right = set([1, 2])
    name  = "equal pair"
    cases = "==", "<=", ">="

#------------------------------------------------------------------------------

class TestSubsetEmptyNonEmpty(TestSubsets):
    left  = set()
    right = set([1, 2])
    name  = "one empty, one non-empty"
    cases = "!=", "<", "<="

#------------------------------------------------------------------------------

class TestSubsetPartial(TestSubsets):
    left  = set([1])
    right = set([1, 2])
    name  = "one a non-empty proper subset of other"
    cases = "!=", "<", "<="

#------------------------------------------------------------------------------

class TestSubsetNonOverlap(TestSubsets):
    left  = set([1])
    right = set([2])
    name  = "neither empty, neither contains"
    cases = "!="

#==============================================================================

class TestOnlySetsInBinaryOps(unittest.TestCase):

    def test_eq_ne(self):
        # Unlike the others, this is testing that == and != *are* allowed.
        self.assertEqual(self.other == self.set, False)
        self.assertEqual(self.set == self.other, False)
        self.assertEqual(self.other != self.set, True)
        self.assertEqual(self.set != self.other, True)

    def test_ge_gt_le_lt(self):
1222 1223 1224 1225
        self.assertRaises(TypeError, lambda: self.set < self.other)
        self.assertRaises(TypeError, lambda: self.set <= self.other)
        self.assertRaises(TypeError, lambda: self.set > self.other)
        self.assertRaises(TypeError, lambda: self.set >= self.other)
1226

1227 1228 1229 1230
        self.assertRaises(TypeError, lambda: self.other < self.set)
        self.assertRaises(TypeError, lambda: self.other <= self.set)
        self.assertRaises(TypeError, lambda: self.other > self.set)
        self.assertRaises(TypeError, lambda: self.other >= self.set)
1231

1232
    def test_update_operator(self):
1233 1234 1235 1236 1237 1238 1239
        try:
            self.set |= self.other
        except TypeError:
            pass
        else:
            self.fail("expected TypeError")

1240
    def test_update(self):
1241
        if self.otherIsIterable:
1242
            self.set.update(self.other)
1243
        else:
1244
            self.assertRaises(TypeError, self.set.update, self.other)
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349

    def test_union(self):
        self.assertRaises(TypeError, lambda: self.set | self.other)
        self.assertRaises(TypeError, lambda: self.other | self.set)
        if self.otherIsIterable:
            self.set.union(self.other)
        else:
            self.assertRaises(TypeError, self.set.union, self.other)

    def test_intersection_update_operator(self):
        try:
            self.set &= self.other
        except TypeError:
            pass
        else:
            self.fail("expected TypeError")

    def test_intersection_update(self):
        if self.otherIsIterable:
            self.set.intersection_update(self.other)
        else:
            self.assertRaises(TypeError,
                              self.set.intersection_update,
                              self.other)

    def test_intersection(self):
        self.assertRaises(TypeError, lambda: self.set & self.other)
        self.assertRaises(TypeError, lambda: self.other & self.set)
        if self.otherIsIterable:
            self.set.intersection(self.other)
        else:
            self.assertRaises(TypeError, self.set.intersection, self.other)

    def test_sym_difference_update_operator(self):
        try:
            self.set ^= self.other
        except TypeError:
            pass
        else:
            self.fail("expected TypeError")

    def test_sym_difference_update(self):
        if self.otherIsIterable:
            self.set.symmetric_difference_update(self.other)
        else:
            self.assertRaises(TypeError,
                              self.set.symmetric_difference_update,
                              self.other)

    def test_sym_difference(self):
        self.assertRaises(TypeError, lambda: self.set ^ self.other)
        self.assertRaises(TypeError, lambda: self.other ^ self.set)
        if self.otherIsIterable:
            self.set.symmetric_difference(self.other)
        else:
            self.assertRaises(TypeError, self.set.symmetric_difference, self.other)

    def test_difference_update_operator(self):
        try:
            self.set -= self.other
        except TypeError:
            pass
        else:
            self.fail("expected TypeError")

    def test_difference_update(self):
        if self.otherIsIterable:
            self.set.difference_update(self.other)
        else:
            self.assertRaises(TypeError,
                              self.set.difference_update,
                              self.other)

    def test_difference(self):
        self.assertRaises(TypeError, lambda: self.set - self.other)
        self.assertRaises(TypeError, lambda: self.other - self.set)
        if self.otherIsIterable:
            self.set.difference(self.other)
        else:
            self.assertRaises(TypeError, self.set.difference, self.other)

#------------------------------------------------------------------------------

class TestOnlySetsNumeric(TestOnlySetsInBinaryOps):
    def setUp(self):
        self.set   = set((1, 2, 3))
        self.other = 19
        self.otherIsIterable = False

#------------------------------------------------------------------------------

class TestOnlySetsDict(TestOnlySetsInBinaryOps):
    def setUp(self):
        self.set   = set((1, 2, 3))
        self.other = {1:2, 3:4}
        self.otherIsIterable = True

#------------------------------------------------------------------------------

class TestOnlySetsOperator(TestOnlySetsInBinaryOps):
    def setUp(self):
        self.set   = set((1, 2, 3))
        self.other = operator.add
        self.otherIsIterable = False

1350 1351 1352 1353
    def test_ge_gt_le_lt(self):
        with test_support.check_py3k_warnings():
            super(TestOnlySetsOperator, self).test_ge_gt_le_lt()

1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
#------------------------------------------------------------------------------

class TestOnlySetsTuple(TestOnlySetsInBinaryOps):
    def setUp(self):
        self.set   = set((1, 2, 3))
        self.other = (2, 4, 6)
        self.otherIsIterable = True

#------------------------------------------------------------------------------

class TestOnlySetsString(TestOnlySetsInBinaryOps):
    def setUp(self):
        self.set   = set((1, 2, 3))
        self.other = 'abc'
        self.otherIsIterable = True

#------------------------------------------------------------------------------

class TestOnlySetsGenerator(TestOnlySetsInBinaryOps):
    def setUp(self):
        def gen():
            for i in xrange(0, 10, 2):
                yield i
        self.set   = set((1, 2, 3))
        self.other = gen()
        self.otherIsIterable = True

#==============================================================================

class TestCopying(unittest.TestCase):

    def test_copy(self):
1386 1387 1388 1389 1390 1391 1392
        dup = list(self.set.copy())
        self.assertEqual(len(dup), len(self.set))
        for el in self.set:
            self.assertIn(el, dup)
            pos = dup.index(el)
            self.assertIs(el, dup.pop(pos))
        self.assertFalse(dup)
1393 1394 1395

    def test_deep_copy(self):
        dup = copy.deepcopy(self.set)
1396
        self.assertSetEqual(dup, self.set)
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436

#------------------------------------------------------------------------------

class TestCopyingEmpty(TestCopying):
    def setUp(self):
        self.set = set()

#------------------------------------------------------------------------------

class TestCopyingSingleton(TestCopying):
    def setUp(self):
        self.set = set(["hello"])

#------------------------------------------------------------------------------

class TestCopyingTriple(TestCopying):
    def setUp(self):
        self.set = set(["zero", 0, None])

#------------------------------------------------------------------------------

class TestCopyingTuple(TestCopying):
    def setUp(self):
        self.set = set([(1, 2)])

#------------------------------------------------------------------------------

class TestCopyingNested(TestCopying):
    def setUp(self):
        self.set = set([((1, 2), (3, 4))])

#==============================================================================

class TestIdentities(unittest.TestCase):
    def setUp(self):
        self.a = set('abracadabra')
        self.b = set('alacazam')

    def test_binopsVsSubsets(self):
        a, b = self.a, self.b
1437 1438 1439 1440 1441 1442 1443
        self.assertTrue(a - b < a)
        self.assertTrue(b - a < b)
        self.assertTrue(a & b < a)
        self.assertTrue(a & b < b)
        self.assertTrue(a | b > a)
        self.assertTrue(a | b > b)
        self.assertTrue(a ^ b < a | b)
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533

    def test_commutativity(self):
        a, b = self.a, self.b
        self.assertEqual(a&b, b&a)
        self.assertEqual(a|b, b|a)
        self.assertEqual(a^b, b^a)
        if a != b:
            self.assertNotEqual(a-b, b-a)

    def test_summations(self):
        # check that sums of parts equal the whole
        a, b = self.a, self.b
        self.assertEqual((a-b)|(a&b)|(b-a), a|b)
        self.assertEqual((a&b)|(a^b), a|b)
        self.assertEqual(a|(b-a), a|b)
        self.assertEqual((a-b)|b, a|b)
        self.assertEqual((a-b)|(a&b), a)
        self.assertEqual((b-a)|(a&b), b)
        self.assertEqual((a-b)|(b-a), a^b)

    def test_exclusion(self):
        # check that inverse operations show non-overlap
        a, b, zero = self.a, self.b, set()
        self.assertEqual((a-b)&b, zero)
        self.assertEqual((b-a)&a, zero)
        self.assertEqual((a&b)&(a^b), zero)

# Tests derived from test_itertools.py =======================================

def R(seqn):
    'Regular generator'
    for i in seqn:
        yield i

class G:
    'Sequence using __getitem__'
    def __init__(self, seqn):
        self.seqn = seqn
    def __getitem__(self, i):
        return self.seqn[i]

class I:
    'Sequence using iterator protocol'
    def __init__(self, seqn):
        self.seqn = seqn
        self.i = 0
    def __iter__(self):
        return self
    def next(self):
        if self.i >= len(self.seqn): raise StopIteration
        v = self.seqn[self.i]
        self.i += 1
        return v

class Ig:
    'Sequence using iterator protocol defined with a generator'
    def __init__(self, seqn):
        self.seqn = seqn
        self.i = 0
    def __iter__(self):
        for val in self.seqn:
            yield val

class X:
    'Missing __getitem__ and __iter__'
    def __init__(self, seqn):
        self.seqn = seqn
        self.i = 0
    def next(self):
        if self.i >= len(self.seqn): raise StopIteration
        v = self.seqn[self.i]
        self.i += 1
        return v

class N:
    'Iterator missing next()'
    def __init__(self, seqn):
        self.seqn = seqn
        self.i = 0
    def __iter__(self):
        return self

class E:
    'Test propagation of exceptions'
    def __init__(self, seqn):
        self.seqn = seqn
        self.i = 0
    def __iter__(self):
        return self
    def next(self):
1534
        3 // 0
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555

class S:
    'Test immediate stop'
    def __init__(self, seqn):
        pass
    def __iter__(self):
        return self
    def next(self):
        raise StopIteration

from itertools import chain, imap
def L(seqn):
    'Test multiple tiers of iterators'
    return chain(imap(lambda x:x, R(Ig(G(seqn)))))

class TestVariousIteratorArgs(unittest.TestCase):

    def test_constructor(self):
        for cons in (set, frozenset):
            for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
                for g in (G, I, Ig, S, L, R):
1556
                    self.assertSetEqual(cons(g(s)), set(g(s)))
1557 1558 1559 1560 1561 1562 1563
                self.assertRaises(TypeError, cons , X(s))
                self.assertRaises(TypeError, cons , N(s))
                self.assertRaises(ZeroDivisionError, cons , E(s))

    def test_inline_methods(self):
        s = set('november')
        for data in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5), 'december'):
Raymond Hettinger's avatar
Raymond Hettinger committed
1564
            for meth in (s.union, s.intersection, s.difference, s.symmetric_difference, s.isdisjoint):
1565 1566 1567
                for g in (G, I, Ig, L, R):
                    expected = meth(data)
                    actual = meth(G(data))
Raymond Hettinger's avatar
Raymond Hettinger committed
1568 1569 1570
                    if isinstance(expected, bool):
                        self.assertEqual(actual, expected)
                    else:
1571
                        self.assertSetEqual(actual, expected)
1572 1573 1574 1575 1576 1577
                self.assertRaises(TypeError, meth, X(s))
                self.assertRaises(TypeError, meth, N(s))
                self.assertRaises(ZeroDivisionError, meth, E(s))

    def test_inplace_methods(self):
        for data in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5), 'december'):
1578
            for methname in ('update', 'intersection_update',
1579 1580 1581 1582 1583 1584
                             'difference_update', 'symmetric_difference_update'):
                for g in (G, I, Ig, S, L, R):
                    s = set('january')
                    t = s.copy()
                    getattr(s, methname)(list(g(data)))
                    getattr(t, methname)(g(data))
1585
                    self.assertSetEqual(s, t)
1586 1587 1588 1589 1590

                self.assertRaises(TypeError, getattr(set('january'), methname), X(data))
                self.assertRaises(TypeError, getattr(set('january'), methname), N(data))
                self.assertRaises(ZeroDivisionError, getattr(set('january'), methname), E(data))

1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691
# Application tests (based on David Eppstein's graph recipes ====================================

def powerset(U):
    """Generates all subsets of a set or sequence U."""
    U = iter(U)
    try:
        x = frozenset([U.next()])
        for S in powerset(U):
            yield S
            yield S | x
    except StopIteration:
        yield frozenset()

def cube(n):
    """Graph of n-dimensional hypercube."""
    singletons = [frozenset([x]) for x in range(n)]
    return dict([(x, frozenset([x^s for s in singletons]))
                 for x in powerset(range(n))])

def linegraph(G):
    """Graph, the vertices of which are edges of G,
    with two vertices being adjacent iff the corresponding
    edges share a vertex."""
    L = {}
    for x in G:
        for y in G[x]:
            nx = [frozenset([x,z]) for z in G[x] if z != y]
            ny = [frozenset([y,z]) for z in G[y] if z != x]
            L[frozenset([x,y])] = frozenset(nx+ny)
    return L

def faces(G):
    'Return a set of faces in G.  Where a face is a set of vertices on that face'
    # currently limited to triangles,squares, and pentagons
    f = set()
    for v1, edges in G.items():
        for v2 in edges:
            for v3 in G[v2]:
                if v1 == v3:
                    continue
                if v1 in G[v3]:
                    f.add(frozenset([v1, v2, v3]))
                else:
                    for v4 in G[v3]:
                        if v4 == v2:
                            continue
                        if v1 in G[v4]:
                            f.add(frozenset([v1, v2, v3, v4]))
                        else:
                            for v5 in G[v4]:
                                if v5 == v3 or v5 == v2:
                                    continue
                                if v1 in G[v5]:
                                    f.add(frozenset([v1, v2, v3, v4, v5]))
    return f


class TestGraphs(unittest.TestCase):

    def test_cube(self):

        g = cube(3)                             # vert --> {v1, v2, v3}
        vertices1 = set(g)
        self.assertEqual(len(vertices1), 8)     # eight vertices
        for edge in g.values():
            self.assertEqual(len(edge), 3)      # each vertex connects to three edges
        vertices2 = set(v for edges in g.values() for v in edges)
        self.assertEqual(vertices1, vertices2)  # edge vertices in original set

        cubefaces = faces(g)
        self.assertEqual(len(cubefaces), 6)     # six faces
        for face in cubefaces:
            self.assertEqual(len(face), 4)      # each face is a square

    def test_cuboctahedron(self):

        # http://en.wikipedia.org/wiki/Cuboctahedron
        # 8 triangular faces and 6 square faces
        # 12 indentical vertices each connecting a triangle and square

        g = cube(3)
        cuboctahedron = linegraph(g)            # V( --> {V1, V2, V3, V4}
        self.assertEqual(len(cuboctahedron), 12)# twelve vertices

        vertices = set(cuboctahedron)
        for edges in cuboctahedron.values():
            self.assertEqual(len(edges), 4)     # each vertex connects to four other vertices
        othervertices = set(edge for edges in cuboctahedron.values() for edge in edges)
        self.assertEqual(vertices, othervertices)   # edge vertices in original set

        cubofaces = faces(cuboctahedron)
        facesizes = collections.defaultdict(int)
        for face in cubofaces:
            facesizes[len(face)] += 1
        self.assertEqual(facesizes[3], 8)       # eight triangular faces
        self.assertEqual(facesizes[4], 6)       # six square faces

        for vertex in cuboctahedron:
            edge = vertex                       # Cuboctahedron vertices are edges in Cube
            self.assertEqual(len(edge), 2)      # Two cube vertices define an edge
            for cubevert in edge:
1692
                self.assertIn(cubevert, g)
1693 1694


1695 1696 1697 1698 1699
#==============================================================================

def test_main(verbose=None):
    test_classes = (
        TestSet,
1700
        TestSetSubclass,
Tim Peters's avatar
Tim Peters committed
1701
        TestSetSubclassWithKeywordArgs,
1702
        TestFrozenSet,
1703
        TestFrozenSetSubclass,
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730
        TestSetOfSets,
        TestExceptionPropagation,
        TestBasicOpsEmpty,
        TestBasicOpsSingleton,
        TestBasicOpsTuple,
        TestBasicOpsTriple,
        TestBinaryOps,
        TestUpdateOps,
        TestMutate,
        TestSubsetEqualEmpty,
        TestSubsetEqualNonEmpty,
        TestSubsetEmptyNonEmpty,
        TestSubsetPartial,
        TestSubsetNonOverlap,
        TestOnlySetsNumeric,
        TestOnlySetsDict,
        TestOnlySetsOperator,
        TestOnlySetsTuple,
        TestOnlySetsString,
        TestOnlySetsGenerator,
        TestCopyingEmpty,
        TestCopyingSingleton,
        TestCopyingTriple,
        TestCopyingTuple,
        TestCopyingNested,
        TestIdentities,
        TestVariousIteratorArgs,
1731
        TestGraphs,
1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747
        )

    test_support.run_unittest(*test_classes)

    # verify reference counting
    if verbose and hasattr(sys, "gettotalrefcount"):
        import gc
        counts = [None] * 5
        for i in xrange(len(counts)):
            test_support.run_unittest(*test_classes)
            gc.collect()
            counts[i] = sys.gettotalrefcount()
        print counts

if __name__ == "__main__":
    test_main(verbose=True)