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gerrit-public.fairphone.software / platform / external / python / cpython2 / 1a4ddaecc732c207fa69890db87ac4b47da867b8 / . / Lib / test / test_parser.py
blob: 0f8c1d0d0ab6b131dda06d575f20cf5af5d9725b [file] [log] [blame]
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]1import parser
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]2import unittest
Barry Warsaw04f357c2002-07-23 19:04:11 +0000[diff] [blame]3from test import test_support
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]4
5#
6# First, we test that we can generate trees from valid source fragments,
7# and that these valid trees are indeed allowed by the tree-loading side
8# of the parser module.
9#
10
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]11class RoundtripLegalSyntaxTestCase(unittest.TestCase):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]12
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]13 def roundtrip(self, f, s):
14 st1 = f(s)
15 t = st1.totuple()
16 try:
Fred Drake6e4f2c02001-07-17 19:33:25 +0000[diff] [blame]17 st2 = parser.sequence2st(t)
Anthony Baxterc2a5a632004-08-02 06:10:11 +0000[diff] [blame]18 except parser.ParserError, why:
19 self.fail("could not roundtrip %r: %s" % (s, why))
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]20
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]21 self.assertEquals(t, st2.totuple(),
22 "could not re-generate syntax tree")
Fred Drake28f739a2000-08-25 22:42:40 +0000[diff] [blame]23
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]24 def check_expr(self, s):
25 self.roundtrip(parser.expr, s)
Fred Drake28f739a2000-08-25 22:42:40 +0000[diff] [blame]26
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]27 def check_suite(self, s):
28 self.roundtrip(parser.suite, s)
Fred Drake28f739a2000-08-25 22:42:40 +0000[diff] [blame]29
Fred Drakecf580c72001-07-17 03:01:29 +0000[diff] [blame]30 def test_yield_statement(self):
Tim Peters496563a2002-04-01 00:28:59 +0000[diff] [blame]31 self.check_suite("def f(): yield 1")
32 self.check_suite("def f(): return; yield 1")
33 self.check_suite("def f(): yield 1; return")
34 self.check_suite("def f():\n"
Fred Drakecf580c72001-07-17 03:01:29 +0000[diff] [blame]35 " for x in range(30):\n"
36 " yield x\n")
37
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]38 def test_expressions(self):
39 self.check_expr("foo(1)")
40 self.check_expr("[1, 2, 3]")
41 self.check_expr("[x**3 for x in range(20)]")
42 self.check_expr("[x**3 for x in range(20) if x % 3]")
43 self.check_expr("foo(*args)")
44 self.check_expr("foo(*args, **kw)")
45 self.check_expr("foo(**kw)")
46 self.check_expr("foo(key=value)")
47 self.check_expr("foo(key=value, *args)")
48 self.check_expr("foo(key=value, *args, **kw)")
49 self.check_expr("foo(key=value, **kw)")
50 self.check_expr("foo(a, b, c, *args)")
51 self.check_expr("foo(a, b, c, *args, **kw)")
52 self.check_expr("foo(a, b, c, **kw)")
53 self.check_expr("foo + bar")
Michael W. Hudson5e83b7a2003-01-29 14:20:23 +0000[diff] [blame]54 self.check_expr("foo - bar")
55 self.check_expr("foo * bar")
56 self.check_expr("foo / bar")
57 self.check_expr("foo // bar")
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]58 self.check_expr("lambda: 0")
59 self.check_expr("lambda x: 0")
60 self.check_expr("lambda *y: 0")
61 self.check_expr("lambda *y, **z: 0")
62 self.check_expr("lambda **z: 0")
63 self.check_expr("lambda x, y: 0")
64 self.check_expr("lambda foo=bar: 0")
65 self.check_expr("lambda foo=bar, spaz=nifty+spit: 0")
66 self.check_expr("lambda foo=bar, **z: 0")
67 self.check_expr("lambda foo=bar, blaz=blat+2, **z: 0")
68 self.check_expr("lambda foo=bar, blaz=blat+2, *y, **z: 0")
69 self.check_expr("lambda x, *y, **z: 0")
Raymond Hettinger354433a2004-05-19 08:20:33 +0000[diff] [blame]70 self.check_expr("(x for x in range(10))")
71 self.check_expr("foo(x for x in range(10))")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]72
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]73 def test_print(self):
74 self.check_suite("print")
75 self.check_suite("print 1")
76 self.check_suite("print 1,")
77 self.check_suite("print >>fp")
78 self.check_suite("print >>fp, 1")
79 self.check_suite("print >>fp, 1,")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]80
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]81 def test_simple_expression(self):
82 # expr_stmt
83 self.check_suite("a")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]84
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]85 def test_simple_assignments(self):
86 self.check_suite("a = b")
87 self.check_suite("a = b = c = d = e")
Fred Drake28f739a2000-08-25 22:42:40 +0000[diff] [blame]88
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]89 def test_simple_augmented_assignments(self):
90 self.check_suite("a += b")
91 self.check_suite("a -= b")
92 self.check_suite("a *= b")
93 self.check_suite("a /= b")
Michael W. Hudson5e83b7a2003-01-29 14:20:23 +0000[diff] [blame]94 self.check_suite("a //= b")
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]95 self.check_suite("a %= b")
96 self.check_suite("a &= b")
97 self.check_suite("a |= b")
98 self.check_suite("a ^= b")
99 self.check_suite("a <<= b")
100 self.check_suite("a >>= b")
101 self.check_suite("a **= b")
Fred Drakee3fb18c2001-01-07 06:02:19 +0000[diff] [blame]102
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]103 def test_function_defs(self):
104 self.check_suite("def f(): pass")
105 self.check_suite("def f(*args): pass")
106 self.check_suite("def f(*args, **kw): pass")
107 self.check_suite("def f(**kw): pass")
108 self.check_suite("def f(foo=bar): pass")
109 self.check_suite("def f(foo=bar, *args): pass")
110 self.check_suite("def f(foo=bar, *args, **kw): pass")
111 self.check_suite("def f(foo=bar, **kw): pass")
Fred Drakee3fb18c2001-01-07 06:02:19 +0000[diff] [blame]112
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]113 self.check_suite("def f(a, b): pass")
114 self.check_suite("def f(a, b, *args): pass")
115 self.check_suite("def f(a, b, *args, **kw): pass")
116 self.check_suite("def f(a, b, **kw): pass")
117 self.check_suite("def f(a, b, foo=bar): pass")
118 self.check_suite("def f(a, b, foo=bar, *args): pass")
119 self.check_suite("def f(a, b, foo=bar, *args, **kw): pass")
120 self.check_suite("def f(a, b, foo=bar, **kw): pass")
Fred Drakee3fb18c2001-01-07 06:02:19 +0000[diff] [blame]121
Anthony Baxterc2a5a632004-08-02 06:10:11 +0000[diff] [blame]122 self.check_suite("@staticmethod\n"
123 "def f(): pass")
124 self.check_suite("@staticmethod\n"
125 "@funcattrs(x, y)\n"
126 "def f(): pass")
127 self.check_suite("@funcattrs()\n"
128 "def f(): pass")
129
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]130 def test_import_from_statement(self):
131 self.check_suite("from sys.path import *")
132 self.check_suite("from sys.path import dirname")
Anthony Baxter1a4ddae2004-08-31 10:07:13 +0000[diff] [blame^]133 self.check_suite("from sys.path import (dirname)")
134 self.check_suite("from sys.path import (dirname,)")
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]135 self.check_suite("from sys.path import dirname as my_dirname")
Anthony Baxter1a4ddae2004-08-31 10:07:13 +0000[diff] [blame^]136 self.check_suite("from sys.path import (dirname as my_dirname)")
137 self.check_suite("from sys.path import (dirname as my_dirname,)")
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]138 self.check_suite("from sys.path import dirname, basename")
Anthony Baxter1a4ddae2004-08-31 10:07:13 +0000[diff] [blame^]139 self.check_suite("from sys.path import (dirname, basename)")
140 self.check_suite("from sys.path import (dirname, basename,)")
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]141 self.check_suite(
142 "from sys.path import dirname as my_dirname, basename")
143 self.check_suite(
Anthony Baxter1a4ddae2004-08-31 10:07:13 +0000[diff] [blame^]144 "from sys.path import (dirname as my_dirname, basename)")
145 self.check_suite(
146 "from sys.path import (dirname as my_dirname, basename,)")
147 self.check_suite(
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]148 "from sys.path import dirname, basename as my_basename")
Anthony Baxter1a4ddae2004-08-31 10:07:13 +0000[diff] [blame^]149 self.check_suite(
150 "from sys.path import (dirname, basename as my_basename)")
151 self.check_suite(
152 "from sys.path import (dirname, basename as my_basename,)")
Fred Drakee3fb18c2001-01-07 06:02:19 +0000[diff] [blame]153
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]154 def test_basic_import_statement(self):
155 self.check_suite("import sys")
156 self.check_suite("import sys as system")
157 self.check_suite("import sys, math")
158 self.check_suite("import sys as system, math")
159 self.check_suite("import sys, math as my_math")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]160
Neal Norwitz9caf9c02003-02-10 01:54:06 +0000[diff] [blame]161 def test_pep263(self):
162 self.check_suite("# -*- coding: iso-8859-1 -*-\n"
163 "pass\n")
164
165 def test_assert(self):
166 self.check_suite("assert alo < ahi and blo < bhi\n")
167
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]168#
169# Second, we take *invalid* trees and make sure we get ParserError
170# rejections for them.
171#
172
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]173class IllegalSyntaxTestCase(unittest.TestCase):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]174
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]175 def check_bad_tree(self, tree, label):
176 try:
Fred Drake6e4f2c02001-07-17 19:33:25 +0000[diff] [blame]177 parser.sequence2st(tree)
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]178 except parser.ParserError:
179 pass
180 else:
181 self.fail("did not detect invalid tree for %r" % label)
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]182
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]183 def test_junk(self):
184 # not even remotely valid:
185 self.check_bad_tree((1, 2, 3), "<junk>")
186
Fred Drakecf580c72001-07-17 03:01:29 +0000[diff] [blame]187 def test_illegal_yield_1(self):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]188 # Illegal yield statement: def f(): return 1; yield 1
Fred Drakecf580c72001-07-17 03:01:29 +0000[diff] [blame]189 tree = \
190 (257,
191 (264,
192 (285,
193 (259,
194 (1, 'def'),
195 (1, 'f'),
196 (260, (7, '('), (8, ')')),
197 (11, ':'),
198 (291,
199 (4, ''),
200 (5, ''),
201 (264,
202 (265,
203 (266,
204 (272,
205 (275,
206 (1, 'return'),
207 (313,
208 (292,
209 (293,
210 (294,
211 (295,
212 (297,
213 (298,
214 (299,
215 (300,
216 (301,
217 (302, (303, (304, (305, (2, '1')))))))))))))))))),
218 (264,
219 (265,
220 (266,
221 (272,
222 (276,
223 (1, 'yield'),
224 (313,
225 (292,
226 (293,
227 (294,
228 (295,
229 (297,
230 (298,
231 (299,
232 (300,
233 (301,
234 (302,
235 (303, (304, (305, (2, '1')))))))))))))))))),
236 (4, ''))),
237 (6, ''))))),
238 (4, ''),
239 (0, ''))))
240 self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
241
242 def test_illegal_yield_2(self):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]243 # Illegal return in generator: def f(): return 1; yield 1
Fred Drakecf580c72001-07-17 03:01:29 +0000[diff] [blame]244 tree = \
245 (257,
246 (264,
247 (265,
248 (266,
249 (278,
250 (1, 'from'),
251 (281, (1, '__future__')),
252 (1, 'import'),
253 (279, (1, 'generators')))),
254 (4, ''))),
255 (264,
256 (285,
257 (259,
258 (1, 'def'),
259 (1, 'f'),
260 (260, (7, '('), (8, ')')),
261 (11, ':'),
262 (291,
263 (4, ''),
264 (5, ''),
265 (264,
266 (265,
267 (266,
268 (272,
269 (275,
270 (1, 'return'),
271 (313,
272 (292,
273 (293,
274 (294,
275 (295,
276 (297,
277 (298,
278 (299,
279 (300,
280 (301,
281 (302, (303, (304, (305, (2, '1')))))))))))))))))),
282 (264,
283 (265,
284 (266,
285 (272,
286 (276,
287 (1, 'yield'),
288 (313,
289 (292,
290 (293,
291 (294,
292 (295,
293 (297,
294 (298,
295 (299,
296 (300,
297 (301,
298 (302,
299 (303, (304, (305, (2, '1')))))))))))))))))),
300 (4, ''))),
301 (6, ''))))),
302 (4, ''),
303 (0, ''))))
304 self.check_bad_tree(tree, "def f():\n return 1\n yield 1")
305
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]306 def test_print_chevron_comma(self):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]307 # Illegal input: print >>fp,
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]308 tree = \
309 (257,
310 (264,
311 (265,
312 (266,
313 (268,
314 (1, 'print'),
315 (35, '>>'),
316 (290,
317 (291,
318 (292,
319 (293,
320 (295,
321 (296,
322 (297,
323 (298, (299, (300, (301, (302, (303, (1, 'fp')))))))))))))),
324 (12, ','))),
325 (4, ''))),
326 (0, ''))
327 self.check_bad_tree(tree, "print >>fp,")
328
329 def test_a_comma_comma_c(self):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]330 # Illegal input: a,,c
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]331 tree = \
332 (258,
333 (311,
334 (290,
335 (291,
336 (292,
337 (293,
338 (295,
339 (296,
340 (297,
341 (298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
342 (12, ','),
343 (12, ','),
344 (290,
345 (291,
346 (292,
347 (293,
348 (295,
349 (296,
350 (297,
351 (298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
352 (4, ''),
353 (0, ''))
354 self.check_bad_tree(tree, "a,,c")
355
356 def test_illegal_operator(self):
Guido van Rossum32c2ae72002-08-22 19:45:32 +0000[diff] [blame]357 # Illegal input: a $= b
Fred Drake58422e52001-06-04 03:56:24 +0000[diff] [blame]358 tree = \
359 (257,
360 (264,
361 (265,
362 (266,
363 (267,
364 (312,
365 (291,
366 (292,
367 (293,
368 (294,
369 (296,
370 (297,
371 (298,
372 (299,
373 (300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
374 (268, (37, '$=')),
375 (312,
376 (291,
377 (292,
378 (293,
379 (294,
380 (296,
381 (297,
382 (298,
383 (299,
384 (300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
385 (4, ''))),
386 (0, ''))
387 self.check_bad_tree(tree, "a $= b")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]388
Neal Norwitz9caf9c02003-02-10 01:54:06 +0000[diff] [blame]389 def test_malformed_global(self):
390 #doesn't have global keyword in ast
391 tree = (257,
392 (264,
393 (265,
394 (266,
395 (282, (1, 'foo'))), (4, ''))),
396 (4, ''),
Tim Petersf2715e02003-02-19 02:35:07 +0000[diff] [blame]397 (0, ''))
Neal Norwitz9caf9c02003-02-10 01:54:06 +0000[diff] [blame]398 self.check_bad_tree(tree, "malformed global ast")
Fred Drake79ca79d2000-08-21 22:30:53 +0000[diff] [blame]399
Fred Drake2e2be372001-09-20 21:33:42 +0000[diff] [blame]400def test_main():
Walter Dörwald21d3a322003-05-01 17:45:56 +0000[diff] [blame]401 test_support.run_unittest(
402 RoundtripLegalSyntaxTestCase,
403 IllegalSyntaxTestCase
404 )
Fred Drake2e2be372001-09-20 21:33:42 +0000[diff] [blame]405
406
407if __name__ == "__main__":
408 test_main()