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  • Committer: Jelmer Vernooij
  • Date: 2020-05-24 00:39:50 UTC
  • mto: This revision was merged to the branch mainline in revision 7504.
  • Revision ID: jelmer@jelmer.uk-20200524003950-bbc545r76vc5yajg
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breezy/tests/test__static_tuple.py
 
1
# Copyright (C) 2009, 2010, 2011 Canonical Ltd
 
2
#
 
3
# This program is free software; you can redistribute it and/or modify
 
4
# it under the terms of the GNU General Public License as published by
 
5
# the Free Software Foundation; either version 2 of the License, or
 
6
# (at your option) any later version.
 
7
#
 
8
# This program is distributed in the hope that it will be useful,
 
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
11
# GNU General Public License for more details.
 
12
#
 
13
# You should have received a copy of the GNU General Public License
 
14
# along with this program; if not, write to the Free Software
 
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
"""Tests for the StaticTuple type."""
 
18
 
 
19
try:
 
20
    import cPickle as pickle
 
21
except ImportError:
 
22
    import pickle
 
23
import operator
 
24
import sys
 
25
 
 
26
from breezy import (
 
27
    _static_tuple_py,
 
28
    debug,
 
29
    osutils,
 
30
    static_tuple,
 
31
    tests,
 
32
    )
 
33
from breezy.tests import (
 
34
    features,
 
35
    )
 
36
 
 
37
 
 
38
def load_tests(loader, standard_tests, pattern):
 
39
    """Parameterize tests for all versions of groupcompress."""
 
40
    global compiled_static_tuple_feature
 
41
    suite, compiled_static_tuple_feature = tests.permute_tests_for_extension(
 
42
        standard_tests, loader, 'breezy._static_tuple_py',
 
43
        'breezy._static_tuple_c')
 
44
    return suite
 
45
 
 
46
 
 
47
class TestStaticTuple(tests.TestCase):
 
48
 
 
49
    def assertRefcount(self, count, obj):
 
50
        """Assert that the refcount for obj is what we expect.
 
51
 
 
52
        Note that this automatically adjusts for the fact that calling
 
53
        assertRefcount actually creates a new pointer, as does calling
 
54
        sys.getrefcount. So pass the expected value *before* the call.
 
55
        """
 
56
        # I don't understand why it is getrefcount()-3 here, but it seems to be
 
57
        # correct. If I check in the calling function, with:
 
58
        # self.assertEqual(count, sys.getrefcount(obj)-1)
 
59
        # Then it works fine. Something about passing it to assertRefcount is
 
60
        # actually double-incrementing (and decrementing) the refcount
 
61
        self.assertEqual(count, sys.getrefcount(obj) - 3)
 
62
 
 
63
    def test_create(self):
 
64
        k = self.module.StaticTuple('foo')
 
65
        k = self.module.StaticTuple('foo', 'bar')
 
66
 
 
67
    def test_create_bad_args(self):
 
68
        args_256 = ['a'] * 256
 
69
        # too many args
 
70
        self.assertRaises(TypeError, self.module.StaticTuple, *args_256)
 
71
        args_300 = ['a'] * 300
 
72
        self.assertRaises(TypeError, self.module.StaticTuple, *args_300)
 
73
        # not a string
 
74
        self.assertRaises(TypeError, self.module.StaticTuple, object())
 
75
 
 
76
    def test_concat(self):
 
77
        st1 = self.module.StaticTuple('foo')
 
78
        st2 = self.module.StaticTuple('bar')
 
79
        st3 = self.module.StaticTuple('foo', 'bar')
 
80
        st4 = st1 + st2
 
81
        self.assertEqual(st3, st4)
 
82
        self.assertIsInstance(st4, self.module.StaticTuple)
 
83
 
 
84
    def test_concat_with_tuple(self):
 
85
        st1 = self.module.StaticTuple('foo')
 
86
        t2 = ('bar',)
 
87
        st3 = self.module.StaticTuple('foo', 'bar')
 
88
        st4 = self.module.StaticTuple('bar', 'foo')
 
89
        st5 = st1 + t2
 
90
        st6 = t2 + st1
 
91
        self.assertEqual(st3, st5)
 
92
        self.assertIsInstance(st5, self.module.StaticTuple)
 
93
        self.assertEqual(st4, st6)
 
94
        if self.module is _static_tuple_py:
 
95
            # _static_tuple_py has StaticTuple(tuple), so tuple thinks it
 
96
            # already knows how to concatenate, as such we can't "inject" our
 
97
            # own concatenation...
 
98
            self.assertIsInstance(st6, tuple)
 
99
        else:
 
100
            self.assertIsInstance(st6, self.module.StaticTuple)
 
101
 
 
102
    def test_concat_with_bad_tuple(self):
 
103
        st1 = self.module.StaticTuple('foo')
 
104
        t2 = (object(),)
 
105
        # Using st1.__add__ doesn't give the same results as doing the '+' form
 
106
        self.assertRaises(TypeError, lambda: st1 + t2)
 
107
 
 
108
    def test_concat_with_non_tuple(self):
 
109
        st1 = self.module.StaticTuple('foo')
 
110
        self.assertRaises(TypeError, lambda: st1 + 10)
 
111
 
 
112
    def test_as_tuple(self):
 
113
        k = self.module.StaticTuple('foo')
 
114
        t = k.as_tuple()
 
115
        self.assertEqual(('foo',), t)
 
116
        self.assertIsInstance(t, tuple)
 
117
        self.assertFalse(isinstance(t, self.module.StaticTuple))
 
118
        k = self.module.StaticTuple('foo', 'bar')
 
119
        t = k.as_tuple()
 
120
        self.assertEqual(('foo', 'bar'), t)
 
121
        k2 = self.module.StaticTuple(1, k)
 
122
        t = k2.as_tuple()
 
123
        self.assertIsInstance(t, tuple)
 
124
        # For pickling to work, we need to keep the sub-items as StaticTuple so
 
125
        # that it knows that they also need to be converted.
 
126
        self.assertIsInstance(t[1], self.module.StaticTuple)
 
127
        self.assertEqual((1, ('foo', 'bar')), t)
 
128
 
 
129
    def test_as_tuples(self):
 
130
        k1 = self.module.StaticTuple('foo', 'bar')
 
131
        t = static_tuple.as_tuples(k1)
 
132
        self.assertIsInstance(t, tuple)
 
133
        self.assertEqual(('foo', 'bar'), t)
 
134
        k2 = self.module.StaticTuple(1, k1)
 
135
        t = static_tuple.as_tuples(k2)
 
136
        self.assertIsInstance(t, tuple)
 
137
        self.assertIsInstance(t[1], tuple)
 
138
        self.assertEqual((1, ('foo', 'bar')), t)
 
139
        mixed = (1, k1)
 
140
        t = static_tuple.as_tuples(mixed)
 
141
        self.assertIsInstance(t, tuple)
 
142
        self.assertIsInstance(t[1], tuple)
 
143
        self.assertEqual((1, ('foo', 'bar')), t)
 
144
 
 
145
    def test_len(self):
 
146
        k = self.module.StaticTuple()
 
147
        self.assertEqual(0, len(k))
 
148
        k = self.module.StaticTuple('foo')
 
149
        self.assertEqual(1, len(k))
 
150
        k = self.module.StaticTuple('foo', 'bar')
 
151
        self.assertEqual(2, len(k))
 
152
        k = self.module.StaticTuple('foo', 'bar', 'b', 'b', 'b', 'b', 'b')
 
153
        self.assertEqual(7, len(k))
 
154
        args = ['foo'] * 255
 
155
        k = self.module.StaticTuple(*args)
 
156
        self.assertEqual(255, len(k))
 
157
 
 
158
    def test_hold_other_static_tuples(self):
 
159
        k = self.module.StaticTuple('foo', 'bar')
 
160
        k2 = self.module.StaticTuple(k, k)
 
161
        self.assertEqual(2, len(k2))
 
162
        self.assertIs(k, k2[0])
 
163
        self.assertIs(k, k2[1])
 
164
 
 
165
    def test_getitem(self):
 
166
        k = self.module.StaticTuple('foo', 'bar', 'b', 'b', 'b', 'b', 'z')
 
167
        self.assertEqual('foo', k[0])
 
168
        self.assertEqual('foo', k[0])
 
169
        self.assertEqual('foo', k[0])
 
170
        self.assertEqual('z', k[6])
 
171
        self.assertEqual('z', k[-1])
 
172
        self.assertRaises(IndexError, k.__getitem__, 7)
 
173
        self.assertRaises(IndexError, k.__getitem__, 256 + 7)
 
174
        self.assertRaises(IndexError, k.__getitem__, 12024)
 
175
        # Python's [] resolver handles the negative arguments, so we can't
 
176
        # really test StaticTuple_item() with negative values.
 
177
        self.assertRaises(TypeError, k.__getitem__, 'not-an-int')
 
178
        self.assertRaises(TypeError, k.__getitem__, '5')
 
179
 
 
180
    def test_refcount(self):
 
181
        f = 'fo' + 'oo'
 
182
        num_refs = sys.getrefcount(f) - 1  # sys.getrefcount() adds one
 
183
        k = self.module.StaticTuple(f)
 
184
        self.assertRefcount(num_refs + 1, f)
 
185
        b = k[0]
 
186
        self.assertRefcount(num_refs + 2, f)
 
187
        b = k[0]
 
188
        self.assertRefcount(num_refs + 2, f)
 
189
        c = k[0]
 
190
        self.assertRefcount(num_refs + 3, f)
 
191
        del b, c
 
192
        self.assertRefcount(num_refs + 1, f)
 
193
        del k
 
194
        self.assertRefcount(num_refs, f)
 
195
 
 
196
    def test__repr__(self):
 
197
        k = self.module.StaticTuple('foo', 'bar', 'baz', 'bing')
 
198
        self.assertEqual("StaticTuple('foo', 'bar', 'baz', 'bing')", repr(k))
 
199
 
 
200
    def assertCompareEqual(self, k1, k2):
 
201
        self.assertTrue(k1 == k2)
 
202
        self.assertTrue(k1 <= k2)
 
203
        self.assertTrue(k1 >= k2)
 
204
        self.assertFalse(k1 != k2)
 
205
        self.assertFalse(k1 < k2)
 
206
        self.assertFalse(k1 > k2)
 
207
 
 
208
    def test_holds_None(self):
 
209
        k1 = self.module.StaticTuple(None)
 
210
        # You cannot subclass None anyway
 
211
 
 
212
    def test_holds_int(self):
 
213
        k1 = self.module.StaticTuple(1)
 
214
 
 
215
        class subint(int):
 
216
            pass
 
217
        # But not a subclass, because subint could introduce refcycles
 
218
        self.assertRaises(TypeError, self.module.StaticTuple, subint(2))
 
219
 
 
220
    def test_holds_float(self):
 
221
        k1 = self.module.StaticTuple(1.2)
 
222
 
 
223
        class subfloat(float):
 
224
            pass
 
225
        self.assertRaises(TypeError, self.module.StaticTuple, subfloat(1.5))
 
226
 
 
227
    def test_holds_bytes(self):
 
228
        k1 = self.module.StaticTuple(b'astring')
 
229
 
 
230
        class substr(bytes):
 
231
            pass
 
232
        self.assertRaises(TypeError, self.module.StaticTuple, substr(b'a'))
 
233
 
 
234
    def test_holds_unicode(self):
 
235
        k1 = self.module.StaticTuple(u'\xb5')
 
236
 
 
237
        class subunicode(str):
 
238
            pass
 
239
        self.assertRaises(TypeError, self.module.StaticTuple,
 
240
                          subunicode(u'\xb5'))
 
241
 
 
242
    def test_hold_bool(self):
 
243
        k1 = self.module.StaticTuple(True)
 
244
        k2 = self.module.StaticTuple(False)
 
245
        # Cannot subclass bool
 
246
 
 
247
    def test_compare_same_obj(self):
 
248
        k1 = self.module.StaticTuple('foo', 'bar')
 
249
        self.assertCompareEqual(k1, k1)
 
250
        k2 = self.module.StaticTuple(k1, k1)
 
251
        self.assertCompareEqual(k2, k2)
 
252
        k3 = self.module.StaticTuple('foo', 1, None, u'\xb5', 1.2, 2**65, True,
 
253
                                     k1)
 
254
        self.assertCompareEqual(k3, k3)
 
255
 
 
256
    def test_compare_equivalent_obj(self):
 
257
        k1 = self.module.StaticTuple('foo', 'bar')
 
258
        k2 = self.module.StaticTuple('foo', 'bar')
 
259
        self.assertCompareEqual(k1, k2)
 
260
        k3 = self.module.StaticTuple(k1, k2)
 
261
        k4 = self.module.StaticTuple(k2, k1)
 
262
        self.assertCompareEqual(k1, k2)
 
263
        k5 = self.module.StaticTuple('foo', 1, None, u'\xb5', 1.2, 2**65, True,
 
264
                                     k1)
 
265
        k6 = self.module.StaticTuple('foo', 1, None, u'\xb5', 1.2, 2**65, True,
 
266
                                     k1)
 
267
        self.assertCompareEqual(k5, k6)
 
268
        k7 = self.module.StaticTuple(None)
 
269
        k8 = self.module.StaticTuple(None)
 
270
        self.assertCompareEqual(k7, k8)
 
271
 
 
272
    def test_compare_similar_obj(self):
 
273
        k1 = self.module.StaticTuple('foo' + ' bar', 'bar' + ' baz')
 
274
        k2 = self.module.StaticTuple('fo' + 'o bar', 'ba' + 'r baz')
 
275
        self.assertCompareEqual(k1, k2)
 
276
        k3 = self.module.StaticTuple('foo ' + 'bar', 'bar ' + 'baz')
 
277
        k4 = self.module.StaticTuple('f' + 'oo bar', 'b' + 'ar baz')
 
278
        k5 = self.module.StaticTuple(k1, k2)
 
279
        k6 = self.module.StaticTuple(k3, k4)
 
280
        self.assertCompareEqual(k5, k6)
 
281
 
 
282
    def check_strict_compare(self, k1, k2, mismatched_types):
 
283
        """True if on Python 3 and stricter comparison semantics are used."""
 
284
        if mismatched_types:
 
285
            for op in ("ge", "gt", "le", "lt"):
 
286
                self.assertRaises(TypeError, getattr(operator, op), k1, k2)
 
287
            return True
 
288
        return False
 
289
 
 
290
    def assertCompareDifferent(self, k_small, k_big, mismatched_types=False):
 
291
        self.assertFalse(k_small == k_big)
 
292
        self.assertTrue(k_small != k_big)
 
293
        if not self.check_strict_compare(k_small, k_big, mismatched_types):
 
294
            self.assertFalse(k_small >= k_big)
 
295
            self.assertFalse(k_small > k_big)
 
296
            self.assertTrue(k_small <= k_big)
 
297
            self.assertTrue(k_small < k_big)
 
298
 
 
299
    def assertCompareNoRelation(self, k1, k2, mismatched_types=False):
 
300
        """Run the comparison operators, make sure they do something.
 
301
 
 
302
        However, we don't actually care what comes first or second. This is
 
303
        stuff like cross-class comparisons. We don't want to segfault/raise an
 
304
        exception, but we don't care about the sort order.
 
305
        """
 
306
        self.assertFalse(k1 == k2)
 
307
        self.assertTrue(k1 != k2)
 
308
        if not self.check_strict_compare(k1, k2, mismatched_types):
 
309
            # Do the comparison, but we don't care about the result
 
310
            k1 >= k2
 
311
            k1 > k2
 
312
            k1 <= k2
 
313
            k1 < k2
 
314
 
 
315
    def test_compare_vs_none(self):
 
316
        k1 = self.module.StaticTuple('baz', 'bing')
 
317
        self.assertCompareDifferent(None, k1, mismatched_types=True)
 
318
 
 
319
    def test_compare_cross_class(self):
 
320
        k1 = self.module.StaticTuple('baz', 'bing')
 
321
        self.assertCompareNoRelation(10, k1, mismatched_types=True)
 
322
        self.assertCompareNoRelation('baz', k1, mismatched_types=True)
 
323
 
 
324
    def test_compare_all_different_same_width(self):
 
325
        k1 = self.module.StaticTuple('baz', 'bing')
 
326
        k2 = self.module.StaticTuple('foo', 'bar')
 
327
        self.assertCompareDifferent(k1, k2)
 
328
        k3 = self.module.StaticTuple(k1, k2)
 
329
        k4 = self.module.StaticTuple(k2, k1)
 
330
        self.assertCompareDifferent(k3, k4)
 
331
        k5 = self.module.StaticTuple(1)
 
332
        k6 = self.module.StaticTuple(2)
 
333
        self.assertCompareDifferent(k5, k6)
 
334
        k7 = self.module.StaticTuple(1.2)
 
335
        k8 = self.module.StaticTuple(2.4)
 
336
        self.assertCompareDifferent(k7, k8)
 
337
        k9 = self.module.StaticTuple(u's\xb5')
 
338
        k10 = self.module.StaticTuple(u's\xe5')
 
339
        self.assertCompareDifferent(k9, k10)
 
340
 
 
341
    def test_compare_some_different(self):
 
342
        k1 = self.module.StaticTuple('foo', 'bar')
 
343
        k2 = self.module.StaticTuple('foo', 'zzz')
 
344
        self.assertCompareDifferent(k1, k2)
 
345
        k3 = self.module.StaticTuple(k1, k1)
 
346
        k4 = self.module.StaticTuple(k1, k2)
 
347
        self.assertCompareDifferent(k3, k4)
 
348
        k5 = self.module.StaticTuple('foo', None)
 
349
        self.assertCompareDifferent(k5, k1, mismatched_types=True)
 
350
        self.assertCompareDifferent(k5, k2, mismatched_types=True)
 
351
 
 
352
    def test_compare_diff_width(self):
 
353
        k1 = self.module.StaticTuple('foo')
 
354
        k2 = self.module.StaticTuple('foo', 'bar')
 
355
        self.assertCompareDifferent(k1, k2)
 
356
        k3 = self.module.StaticTuple(k1)
 
357
        k4 = self.module.StaticTuple(k1, k2)
 
358
        self.assertCompareDifferent(k3, k4)
 
359
 
 
360
    def test_compare_different_types(self):
 
361
        k1 = self.module.StaticTuple('foo', 'bar')
 
362
        k2 = self.module.StaticTuple('foo', 1, None, u'\xb5', 1.2, 2**65, True,
 
363
                                     k1)
 
364
        self.assertCompareNoRelation(k1, k2, mismatched_types=True)
 
365
        k3 = self.module.StaticTuple('foo')
 
366
        self.assertCompareDifferent(k3, k1)
 
367
        k4 = self.module.StaticTuple(None)
 
368
        self.assertCompareDifferent(k4, k1, mismatched_types=True)
 
369
        k5 = self.module.StaticTuple(1)
 
370
        self.assertCompareNoRelation(k1, k5, mismatched_types=True)
 
371
 
 
372
    def test_compare_to_tuples(self):
 
373
        k1 = self.module.StaticTuple('foo')
 
374
        self.assertCompareEqual(k1, ('foo',))
 
375
        self.assertCompareEqual(('foo',), k1)
 
376
        self.assertCompareDifferent(k1, ('foo', 'bar'))
 
377
        self.assertCompareDifferent(k1, ('foo', 10))
 
378
 
 
379
        k2 = self.module.StaticTuple('foo', 'bar')
 
380
        self.assertCompareEqual(k2, ('foo', 'bar'))
 
381
        self.assertCompareEqual(('foo', 'bar'), k2)
 
382
        self.assertCompareDifferent(k2, ('foo', 'zzz'))
 
383
        self.assertCompareDifferent(('foo',), k2)
 
384
        self.assertCompareDifferent(('foo', 'aaa'), k2)
 
385
        self.assertCompareDifferent(('baz', 'bing'), k2)
 
386
        self.assertCompareDifferent(('foo', 10), k2, mismatched_types=True)
 
387
 
 
388
        k3 = self.module.StaticTuple(k1, k2)
 
389
        self.assertCompareEqual(k3, (('foo',), ('foo', 'bar')))
 
390
        self.assertCompareEqual((('foo',), ('foo', 'bar')), k3)
 
391
        self.assertCompareEqual(k3, (k1, ('foo', 'bar')))
 
392
        self.assertCompareEqual((k1, ('foo', 'bar')), k3)
 
393
 
 
394
    def test_compare_mixed_depths(self):
 
395
        stuple = self.module.StaticTuple
 
396
        k1 = stuple(stuple('a',), stuple('b',))
 
397
        k2 = stuple(stuple(stuple('c',), stuple('d',)),
 
398
                    stuple('b',))
 
399
        # This requires comparing a StaticTuple to a 'string', and then
 
400
        # interpreting that value in the next higher StaticTuple. This used to
 
401
        # generate a PyErr_BadIternalCall. We now fall back to *something*.
 
402
        self.assertCompareNoRelation(k1, k2, mismatched_types=True)
 
403
 
 
404
    def test_hash(self):
 
405
        k = self.module.StaticTuple('foo')
 
406
        self.assertEqual(hash(k), hash(('foo',)))
 
407
        k = self.module.StaticTuple('foo', 'bar', 'baz', 'bing')
 
408
        as_tuple = ('foo', 'bar', 'baz', 'bing')
 
409
        self.assertEqual(hash(k), hash(as_tuple))
 
410
        x = {k: 'foo'}
 
411
        # Because k == , it replaces the slot, rather than having both
 
412
        # present in the dict.
 
413
        self.assertEqual('foo', x[as_tuple])
 
414
        x[as_tuple] = 'bar'
 
415
        self.assertEqual({as_tuple: 'bar'}, x)
 
416
 
 
417
        k2 = self.module.StaticTuple(k)
 
418
        as_tuple2 = (('foo', 'bar', 'baz', 'bing'),)
 
419
        self.assertEqual(hash(k2), hash(as_tuple2))
 
420
 
 
421
        k3 = self.module.StaticTuple('foo', 1, None, u'\xb5', 1.2, 2**65, True,
 
422
                                     k)
 
423
        as_tuple3 = ('foo', 1, None, u'\xb5', 1.2, 2**65, True, k)
 
424
        self.assertEqual(hash(as_tuple3), hash(k3))
 
425
 
 
426
    def test_slice(self):
 
427
        k = self.module.StaticTuple('foo', 'bar', 'baz', 'bing')
 
428
        self.assertEqual(('foo', 'bar'), k[:2])
 
429
        self.assertEqual(('baz',), k[2:-1])
 
430
        self.assertEqual(('foo', 'baz',), k[::2])
 
431
        self.assertRaises(TypeError, k.__getitem__, 'not_slice')
 
432
 
 
433
    def test_referents(self):
 
434
        # We implement tp_traverse so that things like 'meliae' can measure the
 
435
        # amount of referenced memory. Unfortunately gc.get_referents() first
 
436
        # checks the IS_GC flag before it traverses anything. We could write a
 
437
        # helper func, but that won't work for the generic implementation...
 
438
        self.requireFeature(features.meliae)
 
439
        from meliae import scanner
 
440
        strs = ['foo', 'bar', 'baz', 'bing']
 
441
        k = self.module.StaticTuple(*strs)
 
442
        if self.module is _static_tuple_py:
 
443
            refs = strs + [self.module.StaticTuple]
 
444
        else:
 
445
            refs = strs
 
446
        self.assertEqual(sorted(refs), sorted(scanner.get_referents(k)))
 
447
 
 
448
    def test_nested_referents(self):
 
449
        self.requireFeature(features.meliae)
 
450
        from meliae import scanner
 
451
        strs = ['foo', 'bar', 'baz', 'bing']
 
452
        k1 = self.module.StaticTuple(*strs[:2])
 
453
        k2 = self.module.StaticTuple(*strs[2:])
 
454
        k3 = self.module.StaticTuple(k1, k2)
 
455
        refs = [k1, k2]
 
456
        if self.module is _static_tuple_py:
 
457
            refs.append(self.module.StaticTuple)
 
458
        self.assertEqual(sorted(refs),
 
459
                         sorted(scanner.get_referents(k3)))
 
460
 
 
461
    def test_empty_is_singleton(self):
 
462
        key = self.module.StaticTuple()
 
463
        self.assertIs(key, self.module._empty_tuple)
 
464
 
 
465
    def test_intern(self):
 
466
        unique_str1 = 'unique str ' + osutils.rand_chars(20)
 
467
        unique_str2 = 'unique str ' + osutils.rand_chars(20)
 
468
        key = self.module.StaticTuple(unique_str1, unique_str2)
 
469
        self.assertFalse(key in self.module._interned_tuples)
 
470
        key2 = self.module.StaticTuple(unique_str1, unique_str2)
 
471
        self.assertEqual(key, key2)
 
472
        self.assertIsNot(key, key2)
 
473
        key3 = key.intern()
 
474
        self.assertIs(key, key3)
 
475
        self.assertTrue(key in self.module._interned_tuples)
 
476
        self.assertEqual(key, self.module._interned_tuples[key])
 
477
        key2 = key2.intern()
 
478
        self.assertIs(key, key2)
 
479
 
 
480
    def test__c_intern_handles_refcount(self):
 
481
        if self.module is _static_tuple_py:
 
482
            return  # Not applicable
 
483
        unique_str1 = 'unique str ' + osutils.rand_chars(20)
 
484
        unique_str2 = 'unique str ' + osutils.rand_chars(20)
 
485
        key = self.module.StaticTuple(unique_str1, unique_str2)
 
486
        self.assertRefcount(1, key)
 
487
        self.assertFalse(key in self.module._interned_tuples)
 
488
        self.assertFalse(key._is_interned())
 
489
        key2 = self.module.StaticTuple(unique_str1, unique_str2)
 
490
        self.assertRefcount(1, key)
 
491
        self.assertRefcount(1, key2)
 
492
        self.assertEqual(key, key2)
 
493
        self.assertIsNot(key, key2)
 
494
 
 
495
        key3 = key.intern()
 
496
        self.assertIs(key, key3)
 
497
        self.assertTrue(key in self.module._interned_tuples)
 
498
        self.assertEqual(key, self.module._interned_tuples[key])
 
499
        # key and key3, but we 'hide' the one in _interned_tuples
 
500
        self.assertRefcount(2, key)
 
501
        del key3
 
502
        self.assertRefcount(1, key)
 
503
        self.assertTrue(key._is_interned())
 
504
        self.assertRefcount(1, key2)
 
505
        key3 = key2.intern()
 
506
        # key3 now points to key as well, and *not* to key2
 
507
        self.assertRefcount(2, key)
 
508
        self.assertRefcount(1, key2)
 
509
        self.assertIs(key, key3)
 
510
        self.assertIsNot(key3, key2)
 
511
        del key2
 
512
        del key3
 
513
        self.assertRefcount(1, key)
 
514
 
 
515
    def test__c_keys_are_not_immortal(self):
 
516
        if self.module is _static_tuple_py:
 
517
            return  # Not applicable
 
518
        unique_str1 = 'unique str ' + osutils.rand_chars(20)
 
519
        unique_str2 = 'unique str ' + osutils.rand_chars(20)
 
520
        key = self.module.StaticTuple(unique_str1, unique_str2)
 
521
        self.assertFalse(key in self.module._interned_tuples)
 
522
        self.assertRefcount(1, key)
 
523
        key = key.intern()
 
524
        self.assertRefcount(1, key)
 
525
        self.assertTrue(key in self.module._interned_tuples)
 
526
        self.assertTrue(key._is_interned())
 
527
        del key
 
528
        # Create a new entry, which would point to the same location
 
529
        key = self.module.StaticTuple(unique_str1, unique_str2)
 
530
        self.assertRefcount(1, key)
 
531
        # This old entry in _interned_tuples should be gone
 
532
        self.assertFalse(key in self.module._interned_tuples)
 
533
        self.assertFalse(key._is_interned())
 
534
 
 
535
    def test__c_has_C_API(self):
 
536
        if self.module is _static_tuple_py:
 
537
            return
 
538
        self.assertIsNot(None, self.module._C_API)
 
539
 
 
540
    def test_from_sequence_tuple(self):
 
541
        st = self.module.StaticTuple.from_sequence(('foo', 'bar'))
 
542
        self.assertIsInstance(st, self.module.StaticTuple)
 
543
        self.assertEqual(('foo', 'bar'), st)
 
544
 
 
545
    def test_from_sequence_str(self):
 
546
        st = self.module.StaticTuple.from_sequence('foo')
 
547
        self.assertIsInstance(st, self.module.StaticTuple)
 
548
        self.assertEqual(('f', 'o', 'o'), st)
 
549
 
 
550
    def test_from_sequence_list(self):
 
551
        st = self.module.StaticTuple.from_sequence(['foo', 'bar'])
 
552
        self.assertIsInstance(st, self.module.StaticTuple)
 
553
        self.assertEqual(('foo', 'bar'), st)
 
554
 
 
555
    def test_from_sequence_static_tuple(self):
 
556
        st = self.module.StaticTuple('foo', 'bar')
 
557
        st2 = self.module.StaticTuple.from_sequence(st)
 
558
        # If the source is a StaticTuple already, we return the exact object
 
559
        self.assertIs(st, st2)
 
560
 
 
561
    def test_from_sequence_not_sequence(self):
 
562
        self.assertRaises(TypeError,
 
563
                          self.module.StaticTuple.from_sequence, object())
 
564
        self.assertRaises(TypeError,
 
565
                          self.module.StaticTuple.from_sequence, 10)
 
566
 
 
567
    def test_from_sequence_incorrect_args(self):
 
568
        self.assertRaises(TypeError,
 
569
                          self.module.StaticTuple.from_sequence, object(), 'a')
 
570
        self.assertRaises(TypeError,
 
571
                          self.module.StaticTuple.from_sequence, foo='a')
 
572
 
 
573
    def test_from_sequence_iterable(self):
 
574
        st = self.module.StaticTuple.from_sequence(iter(['foo', 'bar']))
 
575
        self.assertIsInstance(st, self.module.StaticTuple)
 
576
        self.assertEqual(('foo', 'bar'), st)
 
577
 
 
578
    def test_from_sequence_generator(self):
 
579
        def generate_tuple():
 
580
            yield 'foo'
 
581
            yield 'bar'
 
582
        st = self.module.StaticTuple.from_sequence(generate_tuple())
 
583
        self.assertIsInstance(st, self.module.StaticTuple)
 
584
        self.assertEqual(('foo', 'bar'), st)
 
585
 
 
586
    def test_pickle(self):
 
587
        st = self.module.StaticTuple('foo', 'bar')
 
588
        pickled = pickle.dumps(st)
 
589
        unpickled = pickle.loads(pickled)
 
590
        self.assertEqual(unpickled, st)
 
591
 
 
592
    def test_pickle_empty(self):
 
593
        st = self.module.StaticTuple()
 
594
        pickled = pickle.dumps(st)
 
595
        unpickled = pickle.loads(pickled)
 
596
        self.assertIs(st, unpickled)
 
597
 
 
598
    def test_pickle_nested(self):
 
599
        st = self.module.StaticTuple('foo', self.module.StaticTuple('bar'))
 
600
        pickled = pickle.dumps(st)
 
601
        unpickled = pickle.loads(pickled)
 
602
        self.assertEqual(unpickled, st)
 
603
 
 
604
    def test_static_tuple_thunk(self):
 
605
        # Make sure the right implementation is available from
 
606
        # breezy.static_tuple.StaticTuple.
 
607
        if self.module is _static_tuple_py:
 
608
            if compiled_static_tuple_feature.available():
 
609
                # We will be using the C version
 
610
                return
 
611
        self.assertIs(static_tuple.StaticTuple,
 
612
                      self.module.StaticTuple)
 
613
 
 
614
 
 
615
class TestEnsureStaticTuple(tests.TestCase):
 
616
 
 
617
    def test_is_static_tuple(self):
 
618
        st = static_tuple.StaticTuple('foo')
 
619
        st2 = static_tuple.expect_static_tuple(st)
 
620
        self.assertIs(st, st2)
 
621
 
 
622
    def test_is_tuple(self):
 
623
        t = ('foo',)
 
624
        st = static_tuple.expect_static_tuple(t)
 
625
        self.assertIsInstance(st, static_tuple.StaticTuple)
 
626
        self.assertEqual(t, st)
 
627
 
 
628
    def test_flagged_is_static_tuple(self):
 
629
        debug.debug_flags.add('static_tuple')
 
630
        st = static_tuple.StaticTuple('foo')
 
631
        st2 = static_tuple.expect_static_tuple(st)
 
632
        self.assertIs(st, st2)
 
633
 
 
634
    def test_flagged_is_tuple(self):
 
635
        debug.debug_flags.add('static_tuple')
 
636
        t = ('foo',)
 
637
        self.assertRaises(TypeError, static_tuple.expect_static_tuple, t)