summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_extcall.py
blob: 043df0131125173f925a83b5340794793aa99f6c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449

"""Doctest for method/function calls.

We're going the use these types for extra testing

    >>> from collections import UserList
    >>> from collections import UserDict

We're defining four helper functions

    >>> def e(a,b):
    ...     print(a, b)

    >>> def f(*a, **k):
    ...     print(a, support.sortdict(k))

    >>> def g(x, *y, **z):
    ...     print(x, y, support.sortdict(z))

    >>> def h(j=1, a=2, h=3):
    ...     print(j, a, h)

Argument list examples

    >>> f()
    () {}
    >>> f(1)
    (1,) {}
    >>> f(1, 2)
    (1, 2) {}
    >>> f(1, 2, 3)
    (1, 2, 3) {}
    >>> f(1, 2, 3, *(4, 5))
    (1, 2, 3, 4, 5) {}
    >>> f(1, 2, 3, *[4, 5])
    (1, 2, 3, 4, 5) {}
    >>> f(*[1, 2, 3], 4, 5)
    (1, 2, 3, 4, 5) {}
    >>> f(1, 2, 3, *UserList([4, 5]))
    (1, 2, 3, 4, 5) {}
    >>> f(1, 2, 3, *[4, 5], *[6, 7])
    (1, 2, 3, 4, 5, 6, 7) {}
    >>> f(1, *[2, 3], 4, *[5, 6], 7)
    (1, 2, 3, 4, 5, 6, 7) {}
    >>> f(*UserList([1, 2]), *UserList([3, 4]), 5, *UserList([6, 7]))
    (1, 2, 3, 4, 5, 6, 7) {}

Here we add keyword arguments

    >>> f(1, 2, 3, **{'a':4, 'b':5})
    (1, 2, 3) {'a': 4, 'b': 5}
    >>> f(1, 2, **{'a': -1, 'b': 5}, **{'a': 4, 'c': 6})
    Traceback (most recent call last):
        ...
    TypeError: f() got multiple values for keyword argument 'a'
    >>> f(1, 2, **{'a': -1, 'b': 5}, a=4, c=6)
    Traceback (most recent call last):
        ...
    TypeError: f() got multiple values for keyword argument 'a'
    >>> f(1, 2, a=3, **{'a': 4}, **{'a': 5})
    Traceback (most recent call last):
        ...
    TypeError: f() got multiple values for keyword argument 'a'
    >>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
    (1, 2, 3, 4, 5) {'a': 6, 'b': 7}
    >>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
    (1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
    >>> f(1, 2, 3, *[4, 5], **{'c': 8}, **{'a':6, 'b':7})
    (1, 2, 3, 4, 5) {'a': 6, 'b': 7, 'c': 8}
    >>> f(1, 2, 3, *(4, 5), x=6, y=7, **{'a':8, 'b': 9})
    (1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}

    >>> f(1, 2, 3, **UserDict(a=4, b=5))
    (1, 2, 3) {'a': 4, 'b': 5}
    >>> f(1, 2, 3, *(4, 5), **UserDict(a=6, b=7))
    (1, 2, 3, 4, 5) {'a': 6, 'b': 7}
    >>> f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
    (1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
    >>> f(1, 2, 3, *(4, 5), x=6, y=7, **UserDict(a=8, b=9))
    (1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}

Examples with invalid arguments (TypeErrors). We're also testing the function
names in the exception messages.

Verify clearing of SF bug #733667

    >>> e(c=4)
    Traceback (most recent call last):
      ...
    TypeError: e() got an unexpected keyword argument 'c'

    >>> g()
    Traceback (most recent call last):
      ...
    TypeError: g() missing 1 required positional argument: 'x'

    >>> g(*())
    Traceback (most recent call last):
      ...
    TypeError: g() missing 1 required positional argument: 'x'

    >>> g(*(), **{})
    Traceback (most recent call last):
      ...
    TypeError: g() missing 1 required positional argument: 'x'

    >>> g(1)
    1 () {}
    >>> g(1, 2)
    1 (2,) {}
    >>> g(1, 2, 3)
    1 (2, 3) {}
    >>> g(1, 2, 3, *(4, 5))
    1 (2, 3, 4, 5) {}

    >>> class Nothing: pass
    ...
    >>> g(*Nothing())
    Traceback (most recent call last):
      ...
    TypeError: g() argument after * must be an iterable, not Nothing

    >>> class Nothing:
    ...     def __len__(self): return 5
    ...

    >>> g(*Nothing())
    Traceback (most recent call last):
      ...
    TypeError: g() argument after * must be an iterable, not Nothing

    >>> class Nothing():
    ...     def __len__(self): return 5
    ...     def __getitem__(self, i):
    ...         if i<3: return i
    ...         else: raise IndexError(i)
    ...

    >>> g(*Nothing())
    0 (1, 2) {}

    >>> class Nothing:
    ...     def __init__(self): self.c = 0
    ...     def __iter__(self): return self
    ...     def __next__(self):
    ...         if self.c == 4:
    ...             raise StopIteration
    ...         c = self.c
    ...         self.c += 1
    ...         return c
    ...

    >>> g(*Nothing())
    0 (1, 2, 3) {}

Check for issue #4806: Does a TypeError in a generator get propagated with the
right error message? (Also check with other iterables.)

    >>> def broken(): raise TypeError("myerror")
    ...

    >>> g(*(broken() for i in range(1)))
    Traceback (most recent call last):
      ...
    TypeError: myerror

    >>> class BrokenIterable1:
    ...     def __iter__(self):
    ...         raise TypeError('myerror')
    ...
    >>> g(*BrokenIterable1())
    Traceback (most recent call last):
      ...
    TypeError: myerror

    >>> class BrokenIterable2:
    ...     def __iter__(self):
    ...         yield 0
    ...         raise TypeError('myerror')
    ...
    >>> g(*BrokenIterable2())
    Traceback (most recent call last):
      ...
    TypeError: myerror

    >>> class BrokenSequence:
    ...     def __getitem__(self, idx):
    ...         raise TypeError('myerror')
    ...
    >>> g(*BrokenSequence())
    Traceback (most recent call last):
      ...
    TypeError: myerror

Make sure that the function doesn't stomp the dictionary

    >>> d = {'a': 1, 'b': 2, 'c': 3}
    >>> d2 = d.copy()
    >>> g(1, d=4, **d)
    1 () {'a': 1, 'b': 2, 'c': 3, 'd': 4}
    >>> d == d2
    True

What about willful misconduct?

    >>> def saboteur(**kw):
    ...     kw['x'] = 'm'
    ...     return kw

    >>> d = {}
    >>> kw = saboteur(a=1, **d)
    >>> d
    {}


    >>> g(1, 2, 3, **{'x': 4, 'y': 5})
    Traceback (most recent call last):
      ...
    TypeError: g() got multiple values for argument 'x'

    >>> f(**{1:2})
    Traceback (most recent call last):
      ...
    TypeError: f() keywords must be strings

    >>> h(**{'e': 2})
    Traceback (most recent call last):
      ...
    TypeError: h() got an unexpected keyword argument 'e'

    >>> h(*h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after * must be an iterable, not function

    >>> h(1, *h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after * must be an iterable, not function

    >>> h(*[1], *h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after * must be an iterable, not function

    >>> dir(*h)
    Traceback (most recent call last):
      ...
    TypeError: dir() argument after * must be an iterable, not function

    >>> None(*h)
    Traceback (most recent call last):
      ...
    TypeError: NoneType object argument after * must be an iterable, \
not function

    >>> h(**h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not function

    >>> h(**[])
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not list

    >>> h(a=1, **h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not function

    >>> h(a=1, **[])
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not list

    >>> h(**{'a': 1}, **h)
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not function

    >>> h(**{'a': 1}, **[])
    Traceback (most recent call last):
      ...
    TypeError: h() argument after ** must be a mapping, not list

    >>> dir(**h)
    Traceback (most recent call last):
      ...
    TypeError: dir() argument after ** must be a mapping, not function

    >>> None(**h)
    Traceback (most recent call last):
      ...
    TypeError: NoneType object argument after ** must be a mapping, \
not function

    >>> dir(b=1, **{'b': 1})
    Traceback (most recent call last):
      ...
    TypeError: dir() got multiple values for keyword argument 'b'

Another helper function

    >>> def f2(*a, **b):
    ...     return a, b


    >>> d = {}
    >>> for i in range(512):
    ...     key = 'k%d' % i
    ...     d[key] = i
    >>> a, b = f2(1, *(2,3), **d)
    >>> len(a), len(b), b == d
    (3, 512, True)

    >>> class Foo:
    ...     def method(self, arg1, arg2):
    ...         return arg1+arg2

    >>> x = Foo()
    >>> Foo.method(*(x, 1, 2))
    3
    >>> Foo.method(x, *(1, 2))
    3
    >>> Foo.method(*(1, 2, 3))
    5
    >>> Foo.method(1, *[2, 3])
    5

A PyCFunction that takes only positional parameters should allow an
empty keyword dictionary to pass without a complaint, but raise a
TypeError if te dictionary is not empty

    >>> try:
    ...     silence = id(1, *{})
    ...     True
    ... except:
    ...     False
    True

    >>> id(1, **{'foo': 1})
    Traceback (most recent call last):
      ...
    TypeError: id() takes no keyword arguments

A corner case of keyword dictionary items being deleted during
the function call setup. See <http://bugs.python.org/issue2016>.

    >>> class Name(str):
    ...     def __eq__(self, other):
    ...         try:
    ...              del x[self]
    ...         except KeyError:
    ...              pass
    ...         return str.__eq__(self, other)
    ...     def __hash__(self):
    ...         return str.__hash__(self)

    >>> x = {Name("a"):1, Name("b"):2}
    >>> def f(a, b):
    ...     print(a,b)
    >>> f(**x)
    1 2

Too many arguments:

    >>> def f(): pass
    >>> f(1)
    Traceback (most recent call last):
      ...
    TypeError: f() takes 0 positional arguments but 1 was given
    >>> def f(a): pass
    >>> f(1, 2)
    Traceback (most recent call last):
      ...
    TypeError: f() takes 1 positional argument but 2 were given
    >>> def f(a, b=1): pass
    >>> f(1, 2, 3)
    Traceback (most recent call last):
      ...
    TypeError: f() takes from 1 to 2 positional arguments but 3 were given
    >>> def f(*, kw): pass
    >>> f(1, kw=3)
    Traceback (most recent call last):
      ...
    TypeError: f() takes 0 positional arguments but 1 positional argument (and 1 keyword-only argument) were given
    >>> def f(*, kw, b): pass
    >>> f(1, 2, 3, b=3, kw=3)
    Traceback (most recent call last):
      ...
    TypeError: f() takes 0 positional arguments but 3 positional arguments (and 2 keyword-only arguments) were given
    >>> def f(a, b=2, *, kw): pass
    >>> f(2, 3, 4, kw=4)
    Traceback (most recent call last):
      ...
    TypeError: f() takes from 1 to 2 positional arguments but 3 positional arguments (and 1 keyword-only argument) were given

Too few and missing arguments:

    >>> def f(a): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 1 required positional argument: 'a'
    >>> def f(a, b): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 2 required positional arguments: 'a' and 'b'
    >>> def f(a, b, c): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 3 required positional arguments: 'a', 'b', and 'c'
    >>> def f(a, b, c, d, e): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 5 required positional arguments: 'a', 'b', 'c', 'd', and 'e'
    >>> def f(a, b=4, c=5, d=5): pass
    >>> f(c=12, b=9)
    Traceback (most recent call last):
      ...
    TypeError: f() missing 1 required positional argument: 'a'

Same with keyword only args:

    >>> def f(*, w): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 1 required keyword-only argument: 'w'
    >>> def f(*, a, b, c, d, e): pass
    >>> f()
    Traceback (most recent call last):
      ...
    TypeError: f() missing 5 required keyword-only arguments: 'a', 'b', 'c', 'd', and 'e'

"""

import sys
from test import support

def test_main():
    support.run_doctest(sys.modules[__name__], True)

if __name__ == '__main__':
    test_main()