Python code coverage for Lib/test/test_syntax.py

#	count	content
1	n/a	"""This module tests SyntaxErrors.
2	n/a
3	n/a	Here's an example of the sort of thing that is tested.
4	n/a
5	n/a	>>> def f(x):
6	n/a	... global x
7	n/a	Traceback (most recent call last):
8	n/a	SyntaxError: name 'x' is parameter and global
9	n/a
10	n/a	The tests are all raise SyntaxErrors. They were created by checking
11	n/a	each C call that raises SyntaxError. There are several modules that
12	n/a	raise these exceptions-- ast.c, compile.c, future.c, pythonrun.c, and
13	n/a	symtable.c.
14	n/a
15	n/a	The parser itself outlaws a lot of invalid syntax. None of these
16	n/a	errors are tested here at the moment. We should add some tests; since
17	n/a	there are infinitely many programs with invalid syntax, we would need
18	n/a	to be judicious in selecting some.
19	n/a
20	n/a	The compiler generates a synthetic module name for code executed by
21	n/a	doctest. Since all the code comes from the same module, a suffix like
22	n/a	[1] is appended to the module name, As a consequence, changing the
23	n/a	order of tests in this module means renumbering all the errors after
24	n/a	it. (Maybe we should enable the ellipsis option for these tests.)
25	n/a
26	n/a	In ast.c, syntax errors are raised by calling ast_error().
27	n/a
28	n/a	Errors from set_context():
29	n/a
30	n/a	>>> obj.None = 1
31	n/a	Traceback (most recent call last):
32	n/a	SyntaxError: invalid syntax
33	n/a
34	n/a	>>> None = 1
35	n/a	Traceback (most recent call last):
36	n/a	SyntaxError: can't assign to keyword
37	n/a
38	n/a	>>> f() = 1
39	n/a	Traceback (most recent call last):
40	n/a	SyntaxError: can't assign to function call
41	n/a
42	n/a	>>> del f()
43	n/a	Traceback (most recent call last):
44	n/a	SyntaxError: can't delete function call
45	n/a
46	n/a	>>> a + 1 = 2
47	n/a	Traceback (most recent call last):
48	n/a	SyntaxError: can't assign to operator
49	n/a
50	n/a	>>> (x for x in x) = 1
51	n/a	Traceback (most recent call last):
52	n/a	SyntaxError: can't assign to generator expression
53	n/a
54	n/a	>>> 1 = 1
55	n/a	Traceback (most recent call last):
56	n/a	SyntaxError: can't assign to literal
57	n/a
58	n/a	>>> "abc" = 1
59	n/a	Traceback (most recent call last):
60	n/a	SyntaxError: can't assign to literal
61	n/a
62	n/a	>>> b"" = 1
63	n/a	Traceback (most recent call last):
64	n/a	SyntaxError: can't assign to literal
65	n/a
66	n/a	>>> `1` = 1
67	n/a	Traceback (most recent call last):
68	n/a	SyntaxError: invalid syntax
69	n/a
70	n/a	If the left-hand side of an assignment is a list or tuple, an illegal
71	n/a	expression inside that contain should still cause a syntax error.
72	n/a	This test just checks a couple of cases rather than enumerating all of
73	n/a	them.
74	n/a
75	n/a	>>> (a, "b", c) = (1, 2, 3)
76	n/a	Traceback (most recent call last):
77	n/a	SyntaxError: can't assign to literal
78	n/a
79	n/a	>>> [a, b, c + 1] = [1, 2, 3]
80	n/a	Traceback (most recent call last):
81	n/a	SyntaxError: can't assign to operator
82	n/a
83	n/a	>>> a if 1 else b = 1
84	n/a	Traceback (most recent call last):
85	n/a	SyntaxError: can't assign to conditional expression
86	n/a
87	n/a	From compiler_complex_args():
88	n/a
89	n/a	>>> def f(None=1):
90	n/a	... pass
91	n/a	Traceback (most recent call last):
92	n/a	SyntaxError: invalid syntax
93	n/a
94	n/a
95	n/a	From ast_for_arguments():
96	n/a
97	n/a	>>> def f(x, y=1, z):
98	n/a	... pass
99	n/a	Traceback (most recent call last):
100	n/a	SyntaxError: non-default argument follows default argument
101	n/a
102	n/a	>>> def f(x, None):
103	n/a	... pass
104	n/a	Traceback (most recent call last):
105	n/a	SyntaxError: invalid syntax
106	n/a
107	n/a	>>> def f(*None):
108	n/a	... pass
109	n/a	Traceback (most recent call last):
110	n/a	SyntaxError: invalid syntax
111	n/a
112	n/a	>>> def f(**None):
113	n/a	... pass
114	n/a	Traceback (most recent call last):
115	n/a	SyntaxError: invalid syntax
116	n/a
117	n/a
118	n/a	From ast_for_funcdef():
119	n/a
120	n/a	>>> def None(x):
121	n/a	... pass
122	n/a	Traceback (most recent call last):
123	n/a	SyntaxError: invalid syntax
124	n/a
125	n/a
126	n/a	From ast_for_call():
127	n/a
128	n/a	>>> def f(it, *varargs):
129	n/a	... return list(it)
130	n/a	>>> L = range(10)
131	n/a	>>> f(x for x in L)
132	n/a	[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
133	n/a	>>> f(x for x in L, 1)
134	n/a	Traceback (most recent call last):
135	n/a	SyntaxError: Generator expression must be parenthesized if not sole argument
136	n/a	>>> f(x for x in L, y for y in L)
137	n/a	Traceback (most recent call last):
138	n/a	SyntaxError: Generator expression must be parenthesized if not sole argument
139	n/a	>>> f((x for x in L), 1)
140	n/a	[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
141	n/a
142	n/a	>>> def g(args, *kwargs):
143	n/a	... print(args, sorted(kwargs.items()))
144	n/a	>>> g(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
145	n/a	... 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
146	n/a	... 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
147	n/a	... 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73,
148	n/a	... 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
149	n/a	... 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
150	n/a	... 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121,
151	n/a	... 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135,
152	n/a	... 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
153	n/a	... 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163,
154	n/a	... 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177,
155	n/a	... 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
156	n/a	... 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205,
157	n/a	... 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
158	n/a	... 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233,
159	n/a	... 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247,
160	n/a	... 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261,
161	n/a	... 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275,
162	n/a	... 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289,
163	n/a	... 290, 291, 292, 293, 294, 295, 296, 297, 298, 299) # doctest: +ELLIPSIS
164	n/a	(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., 297, 298, 299) []
165	n/a
166	n/a	>>> g(a000=0, a001=1, a002=2, a003=3, a004=4, a005=5, a006=6, a007=7, a008=8,
167	n/a	... a009=9, a010=10, a011=11, a012=12, a013=13, a014=14, a015=15, a016=16,
168	n/a	... a017=17, a018=18, a019=19, a020=20, a021=21, a022=22, a023=23, a024=24,
169	n/a	... a025=25, a026=26, a027=27, a028=28, a029=29, a030=30, a031=31, a032=32,
170	n/a	... a033=33, a034=34, a035=35, a036=36, a037=37, a038=38, a039=39, a040=40,
171	n/a	... a041=41, a042=42, a043=43, a044=44, a045=45, a046=46, a047=47, a048=48,
172	n/a	... a049=49, a050=50, a051=51, a052=52, a053=53, a054=54, a055=55, a056=56,
173	n/a	... a057=57, a058=58, a059=59, a060=60, a061=61, a062=62, a063=63, a064=64,
174	n/a	... a065=65, a066=66, a067=67, a068=68, a069=69, a070=70, a071=71, a072=72,
175	n/a	... a073=73, a074=74, a075=75, a076=76, a077=77, a078=78, a079=79, a080=80,
176	n/a	... a081=81, a082=82, a083=83, a084=84, a085=85, a086=86, a087=87, a088=88,
177	n/a	... a089=89, a090=90, a091=91, a092=92, a093=93, a094=94, a095=95, a096=96,
178	n/a	... a097=97, a098=98, a099=99, a100=100, a101=101, a102=102, a103=103,
179	n/a	... a104=104, a105=105, a106=106, a107=107, a108=108, a109=109, a110=110,
180	n/a	... a111=111, a112=112, a113=113, a114=114, a115=115, a116=116, a117=117,
181	n/a	... a118=118, a119=119, a120=120, a121=121, a122=122, a123=123, a124=124,
182	n/a	... a125=125, a126=126, a127=127, a128=128, a129=129, a130=130, a131=131,
183	n/a	... a132=132, a133=133, a134=134, a135=135, a136=136, a137=137, a138=138,
184	n/a	... a139=139, a140=140, a141=141, a142=142, a143=143, a144=144, a145=145,
185	n/a	... a146=146, a147=147, a148=148, a149=149, a150=150, a151=151, a152=152,
186	n/a	... a153=153, a154=154, a155=155, a156=156, a157=157, a158=158, a159=159,
187	n/a	... a160=160, a161=161, a162=162, a163=163, a164=164, a165=165, a166=166,
188	n/a	... a167=167, a168=168, a169=169, a170=170, a171=171, a172=172, a173=173,
189	n/a	... a174=174, a175=175, a176=176, a177=177, a178=178, a179=179, a180=180,
190	n/a	... a181=181, a182=182, a183=183, a184=184, a185=185, a186=186, a187=187,
191	n/a	... a188=188, a189=189, a190=190, a191=191, a192=192, a193=193, a194=194,
192	n/a	... a195=195, a196=196, a197=197, a198=198, a199=199, a200=200, a201=201,
193	n/a	... a202=202, a203=203, a204=204, a205=205, a206=206, a207=207, a208=208,
194	n/a	... a209=209, a210=210, a211=211, a212=212, a213=213, a214=214, a215=215,
195	n/a	... a216=216, a217=217, a218=218, a219=219, a220=220, a221=221, a222=222,
196	n/a	... a223=223, a224=224, a225=225, a226=226, a227=227, a228=228, a229=229,
197	n/a	... a230=230, a231=231, a232=232, a233=233, a234=234, a235=235, a236=236,
198	n/a	... a237=237, a238=238, a239=239, a240=240, a241=241, a242=242, a243=243,
199	n/a	... a244=244, a245=245, a246=246, a247=247, a248=248, a249=249, a250=250,
200	n/a	... a251=251, a252=252, a253=253, a254=254, a255=255, a256=256, a257=257,
201	n/a	... a258=258, a259=259, a260=260, a261=261, a262=262, a263=263, a264=264,
202	n/a	... a265=265, a266=266, a267=267, a268=268, a269=269, a270=270, a271=271,
203	n/a	... a272=272, a273=273, a274=274, a275=275, a276=276, a277=277, a278=278,
204	n/a	... a279=279, a280=280, a281=281, a282=282, a283=283, a284=284, a285=285,
205	n/a	... a286=286, a287=287, a288=288, a289=289, a290=290, a291=291, a292=292,
206	n/a	... a293=293, a294=294, a295=295, a296=296, a297=297, a298=298, a299=299)
207	n/a	... # doctest: +ELLIPSIS
208	n/a	() [('a000', 0), ('a001', 1), ('a002', 2), ..., ('a298', 298), ('a299', 299)]
209	n/a
210	n/a	>>> class C:
211	n/a	... def meth(self, *args):
212	n/a	... return args
213	n/a	>>> obj = C()
214	n/a	>>> obj.meth(
215	n/a	... 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
216	n/a	... 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
217	n/a	... 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
218	n/a	... 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73,
219	n/a	... 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
220	n/a	... 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
221	n/a	... 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121,
222	n/a	... 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135,
223	n/a	... 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
224	n/a	... 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163,
225	n/a	... 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177,
226	n/a	... 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
227	n/a	... 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205,
228	n/a	... 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
229	n/a	... 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233,
230	n/a	... 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247,
231	n/a	... 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261,
232	n/a	... 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275,
233	n/a	... 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289,
234	n/a	... 290, 291, 292, 293, 294, 295, 296, 297, 298, 299) # doctest: +ELLIPSIS
235	n/a	(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., 297, 298, 299)
236	n/a
237	n/a	>>> f(lambda x: x[0] = 3)
238	n/a	Traceback (most recent call last):
239	n/a	SyntaxError: lambda cannot contain assignment
240	n/a
241	n/a	The grammar accepts any test (basically, any expression) in the
242	n/a	keyword slot of a call site. Test a few different options.
243	n/a
244	n/a	>>> f(x()=2)
245	n/a	Traceback (most recent call last):
246	n/a	SyntaxError: keyword can't be an expression
247	n/a	>>> f(a or b=1)
248	n/a	Traceback (most recent call last):
249	n/a	SyntaxError: keyword can't be an expression
250	n/a	>>> f(x.y=1)
251	n/a	Traceback (most recent call last):
252	n/a	SyntaxError: keyword can't be an expression
253	n/a
254	n/a
255	n/a	More set_context():
256	n/a
257	n/a	>>> (x for x in x) += 1
258	n/a	Traceback (most recent call last):
259	n/a	SyntaxError: can't assign to generator expression
260	n/a	>>> None += 1
261	n/a	Traceback (most recent call last):
262	n/a	SyntaxError: can't assign to keyword
263	n/a	>>> f() += 1
264	n/a	Traceback (most recent call last):
265	n/a	SyntaxError: can't assign to function call
266	n/a
267	n/a
268	n/a	Test continue in finally in weird combinations.
269	n/a
270	n/a	continue in for loop under finally should be ok.
271	n/a
272	n/a	>>> def test():
273	n/a	... try:
274	n/a	... pass
275	n/a	... finally:
276	n/a	... for abc in range(10):
277	n/a	... continue
278	n/a	... print(abc)
279	n/a	>>> test()
280	n/a	9
281	n/a
282	n/a	Start simple, a continue in a finally should not be allowed.
283	n/a
284	n/a	>>> def test():
285	n/a	... for abc in range(10):
286	n/a	... try:
287	n/a	... pass
288	n/a	... finally:
289	n/a	... continue
290	n/a	Traceback (most recent call last):
291	n/a	...
292	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
293	n/a
294	n/a	This is essentially a continue in a finally which should not be allowed.
295	n/a
296	n/a	>>> def test():
297	n/a	... for abc in range(10):
298	n/a	... try:
299	n/a	... pass
300	n/a	... finally:
301	n/a	... try:
302	n/a	... continue
303	n/a	... except:
304	n/a	... pass
305	n/a	Traceback (most recent call last):
306	n/a	...
307	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
308	n/a
309	n/a	>>> def foo():
310	n/a	... try:
311	n/a	... pass
312	n/a	... finally:
313	n/a	... continue
314	n/a	Traceback (most recent call last):
315	n/a	...
316	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
317	n/a
318	n/a	>>> def foo():
319	n/a	... for a in ():
320	n/a	... try:
321	n/a	... pass
322	n/a	... finally:
323	n/a	... continue
324	n/a	Traceback (most recent call last):
325	n/a	...
326	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
327	n/a
328	n/a	>>> def foo():
329	n/a	... for a in ():
330	n/a	... try:
331	n/a	... pass
332	n/a	... finally:
333	n/a	... try:
334	n/a	... continue
335	n/a	... finally:
336	n/a	... pass
337	n/a	Traceback (most recent call last):
338	n/a	...
339	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
340	n/a
341	n/a	>>> def foo():
342	n/a	... for a in ():
343	n/a	... try: pass
344	n/a	... finally:
345	n/a	... try:
346	n/a	... pass
347	n/a	... except:
348	n/a	... continue
349	n/a	Traceback (most recent call last):
350	n/a	...
351	n/a	SyntaxError: 'continue' not supported inside 'finally' clause
352	n/a
353	n/a	There is one test for a break that is not in a loop. The compiler
354	n/a	uses a single data structure to keep track of try-finally and loops,
355	n/a	so we need to be sure that a break is actually inside a loop. If it
356	n/a	isn't, there should be a syntax error.
357	n/a
358	n/a	>>> try:
359	n/a	... print(1)
360	n/a	... break
361	n/a	... print(2)
362	n/a	... finally:
363	n/a	... print(3)
364	n/a	Traceback (most recent call last):
365	n/a	...
366	n/a	SyntaxError: 'break' outside loop
367	n/a
368	n/a	This raises a SyntaxError, it used to raise a SystemError.
369	n/a	Context for this change can be found on issue #27514
370	n/a
371	n/a	In 2.5 there was a missing exception and an assert was triggered in a debug
372	n/a	build. The number of blocks must be greater than CO_MAXBLOCKS. SF #1565514
373	n/a
374	n/a	>>> while 1:
375	n/a	... while 2:
376	n/a	... while 3:
377	n/a	... while 4:
378	n/a	... while 5:
379	n/a	... while 6:
380	n/a	... while 8:
381	n/a	... while 9:
382	n/a	... while 10:
383	n/a	... while 11:
384	n/a	... while 12:
385	n/a	... while 13:
386	n/a	... while 14:
387	n/a	... while 15:
388	n/a	... while 16:
389	n/a	... while 17:
390	n/a	... while 18:
391	n/a	... while 19:
392	n/a	... while 20:
393	n/a	... while 21:
394	n/a	... while 22:
395	n/a	... break
396	n/a	Traceback (most recent call last):
397	n/a	...
398	n/a	SyntaxError: too many statically nested blocks
399	n/a
400	n/a	Misuse of the nonlocal and global statement can lead to a few unique syntax errors.
401	n/a
402	n/a	>>> def f():
403	n/a	... x = 1
404	n/a	... global x
405	n/a	Traceback (most recent call last):
406	n/a	...
407	n/a	SyntaxError: name 'x' is assigned to before global declaration
408	n/a
409	n/a	>>> def f():
410	n/a	... x = 1
411	n/a	... def g():
412	n/a	... print(x)
413	n/a	... nonlocal x
414	n/a	Traceback (most recent call last):
415	n/a	...
416	n/a	SyntaxError: name 'x' is used prior to nonlocal declaration
417	n/a
418	n/a	>>> def f(x):
419	n/a	... nonlocal x
420	n/a	Traceback (most recent call last):
421	n/a	...
422	n/a	SyntaxError: name 'x' is parameter and nonlocal
423	n/a
424	n/a	>>> def f():
425	n/a	... global x
426	n/a	... nonlocal x
427	n/a	Traceback (most recent call last):
428	n/a	...
429	n/a	SyntaxError: name 'x' is nonlocal and global
430	n/a
431	n/a	>>> def f():
432	n/a	... nonlocal x
433	n/a	Traceback (most recent call last):
434	n/a	...
435	n/a	SyntaxError: no binding for nonlocal 'x' found
436	n/a
437	n/a	From SF bug #1705365
438	n/a	>>> nonlocal x
439	n/a	Traceback (most recent call last):
440	n/a	...
441	n/a	SyntaxError: nonlocal declaration not allowed at module level
442	n/a
443	n/a	TODO(jhylton): Figure out how to test SyntaxWarning with doctest.
444	n/a
445	n/a	## >>> def f(x):
446	n/a	## ... def f():
447	n/a	## ... print(x)
448	n/a	## ... nonlocal x
449	n/a	## Traceback (most recent call last):
450	n/a	## ...
451	n/a	## SyntaxWarning: name 'x' is assigned to before nonlocal declaration
452	n/a
453	n/a	## >>> def f():
454	n/a	## ... x = 1
455	n/a	## ... nonlocal x
456	n/a	## Traceback (most recent call last):
457	n/a	## ...
458	n/a	## SyntaxWarning: name 'x' is assigned to before nonlocal declaration
459	n/a
460	n/a	From https://bugs.python.org/issue25973
461	n/a	>>> class A:
462	n/a	... def f(self):
463	n/a	... nonlocal __x
464	n/a	Traceback (most recent call last):
465	n/a	...
466	n/a	SyntaxError: no binding for nonlocal '_A__x' found
467	n/a
468	n/a
469	n/a	This tests assignment-context; there was a bug in Python 2.5 where compiling
470	n/a	a complex 'if' (one with 'elif') would fail to notice an invalid suite,
471	n/a	leading to spurious errors.
472	n/a
473	n/a	>>> if 1:
474	n/a	... x() = 1
475	n/a	... elif 1:
476	n/a	... pass
477	n/a	Traceback (most recent call last):
478	n/a	...
479	n/a	SyntaxError: can't assign to function call
480	n/a
481	n/a	>>> if 1:
482	n/a	... pass
483	n/a	... elif 1:
484	n/a	... x() = 1
485	n/a	Traceback (most recent call last):
486	n/a	...
487	n/a	SyntaxError: can't assign to function call
488	n/a
489	n/a	>>> if 1:
490	n/a	... x() = 1
491	n/a	... elif 1:
492	n/a	... pass
493	n/a	... else:
494	n/a	... pass
495	n/a	Traceback (most recent call last):
496	n/a	...
497	n/a	SyntaxError: can't assign to function call
498	n/a
499	n/a	>>> if 1:
500	n/a	... pass
501	n/a	... elif 1:
502	n/a	... x() = 1
503	n/a	... else:
504	n/a	... pass
505	n/a	Traceback (most recent call last):
506	n/a	...
507	n/a	SyntaxError: can't assign to function call
508	n/a
509	n/a	>>> if 1:
510	n/a	... pass
511	n/a	... elif 1:
512	n/a	... pass
513	n/a	... else:
514	n/a	... x() = 1
515	n/a	Traceback (most recent call last):
516	n/a	...
517	n/a	SyntaxError: can't assign to function call
518	n/a
519	n/a	Make sure that the old "raise X, Y[, Z]" form is gone:
520	n/a	>>> raise X, Y
521	n/a	Traceback (most recent call last):
522	n/a	...
523	n/a	SyntaxError: invalid syntax
524	n/a	>>> raise X, Y, Z
525	n/a	Traceback (most recent call last):
526	n/a	...
527	n/a	SyntaxError: invalid syntax
528	n/a
529	n/a
530	n/a	>>> f(a=23, a=234)
531	n/a	Traceback (most recent call last):
532	n/a	...
533	n/a	SyntaxError: keyword argument repeated
534	n/a
535	n/a	>>> {1, 2, 3} = 42
536	n/a	Traceback (most recent call last):
537	n/a	SyntaxError: can't assign to literal
538	n/a
539	n/a	Corner-cases that used to fail to raise the correct error:
540	n/a
541	n/a	>>> def f(*, x=lambda __debug__:0): pass
542	n/a	Traceback (most recent call last):
543	n/a	SyntaxError: assignment to keyword
544	n/a
545	n/a	>>> def f(*args:(lambda __debug__:0)): pass
546	n/a	Traceback (most recent call last):
547	n/a	SyntaxError: assignment to keyword
548	n/a
549	n/a	>>> def f(**kwargs:(lambda __debug__:0)): pass
550	n/a	Traceback (most recent call last):
551	n/a	SyntaxError: assignment to keyword
552	n/a
553	n/a	>>> with (lambda *:0): pass
554	n/a	Traceback (most recent call last):
555	n/a	SyntaxError: named arguments must follow bare *
556	n/a
557	n/a	Corner-cases that used to crash:
558	n/a
559	n/a	>>> def f(**__debug__): pass
560	n/a	Traceback (most recent call last):
561	n/a	SyntaxError: assignment to keyword
562	n/a
563	n/a	>>> def f(*xx, __debug__): pass
564	n/a	Traceback (most recent call last):
565	n/a	SyntaxError: assignment to keyword
566	n/a
567	n/a	"""
568	n/a
569	n/a	import re
570	n/a	import unittest
571	n/a	import warnings
572	n/a
573	n/a	from test import support
574	n/a
575	n/a	class SyntaxTestCase(unittest.TestCase):
576	n/a
577	n/a	def _check_error(self, code, errtext,
578	n/a	filename="<testcase>", mode="exec", subclass=None, lineno=None, offset=None):
579	n/a	"""Check that compiling code raises SyntaxError with errtext.
580	n/a
581	n/a	errtest is a regular expression that must be present in the
582	n/a	test of the exception raised. If subclass is specified it
583	n/a	is the expected subclass of SyntaxError (e.g. IndentationError).
584	n/a	"""
585	n/a	try:
586	n/a	compile(code, filename, mode)
587	n/a	except SyntaxError as err:
588	n/a	if subclass and not isinstance(err, subclass):
589	n/a	self.fail("SyntaxError is not a %s" % subclass.__name__)
590	n/a	mo = re.search(errtext, str(err))
591	n/a	if mo is None:
592	n/a	self.fail("SyntaxError did not contain '%r'" % (errtext,))
593	n/a	self.assertEqual(err.filename, filename)
594	n/a	if lineno is not None:
595	n/a	self.assertEqual(err.lineno, lineno)
596	n/a	if offset is not None:
597	n/a	self.assertEqual(err.offset, offset)
598	n/a	else:
599	n/a	self.fail("compile() did not raise SyntaxError")
600	n/a
601	n/a	def test_assign_call(self):
602	n/a	self._check_error("f() = 1", "assign")
603	n/a
604	n/a	def test_assign_del(self):
605	n/a	self._check_error("del f()", "delete")
606	n/a
607	n/a	def test_global_err_then_warn(self):
608	n/a	# Bug #763201: The SyntaxError raised for one global statement
609	n/a	# shouldn't be clobbered by a SyntaxWarning issued for a later one.
610	n/a	source = """if 1:
611	n/a	def error(a):
612	n/a	global a # SyntaxError
613	n/a	def warning():
614	n/a	b = 1
615	n/a	global b # SyntaxWarning
616	n/a	"""
617	n/a	warnings.filterwarnings(action='ignore', category=SyntaxWarning)
618	n/a	self._check_error(source, "global")
619	n/a	warnings.filters.pop(0)
620	n/a
621	n/a	def test_break_outside_loop(self):
622	n/a	self._check_error("break", "outside loop")
623	n/a
624	n/a	def test_unexpected_indent(self):
625	n/a	self._check_error("foo()\n bar()\n", "unexpected indent",
626	n/a	subclass=IndentationError)
627	n/a
628	n/a	def test_no_indent(self):
629	n/a	self._check_error("if 1:\nfoo()", "expected an indented block",
630	n/a	subclass=IndentationError)
631	n/a
632	n/a	def test_bad_outdent(self):
633	n/a	self._check_error("if 1:\n foo()\n bar()",
634	n/a	"unindent does not match .* level",
635	n/a	subclass=IndentationError)
636	n/a
637	n/a	def test_kwargs_last(self):
638	n/a	self._check_error("int(base=10, '2')",
639	n/a	"positional argument follows keyword argument")
640	n/a
641	n/a	def test_kwargs_last2(self):
642	n/a	self._check_error("int(**{base: 10}, '2')",
643	n/a	"positional argument follows "
644	n/a	"keyword argument unpacking")
645	n/a
646	n/a	def test_kwargs_last3(self):
647	n/a	self._check_error("int(*{base: 10}, ['2'])",
648	n/a	"iterable argument unpacking follows "
649	n/a	"keyword argument unpacking")
650	n/a
651	n/a	def test_main():
652	n/a	support.run_unittest(SyntaxTestCase)
653	n/a	from test import test_syntax
654	n/a	support.run_doctest(test_syntax, verbosity=True)
655	n/a
656	n/a	if __name__ == "__main__":
657	n/a	test_main()