Python code coverage for Lib/test/test_ast.py

#	count	content
1	n/a	import ast
2	n/a	import dis
3	n/a	import os
4	n/a	import sys
5	n/a	import unittest
6	n/a	import weakref
7	n/a
8	n/a	from test import support
9	n/a
10	n/a	def to_tuple(t):
11	n/a	if t is None or isinstance(t, (str, int, complex)):
12	n/a	return t
13	n/a	elif isinstance(t, list):
14	n/a	return [to_tuple(e) for e in t]
15	n/a	result = [t.__class__.__name__]
16	n/a	if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
17	n/a	result.append((t.lineno, t.col_offset))
18	n/a	if t._fields is None:
19	n/a	return tuple(result)
20	n/a	for f in t._fields:
21	n/a	result.append(to_tuple(getattr(t, f)))
22	n/a	return tuple(result)
23	n/a
24	n/a
25	n/a	# These tests are compiled through "exec"
26	n/a	# There should be at least one test per statement
27	n/a	exec_tests = [
28	n/a	# None
29	n/a	"None",
30	n/a	# FunctionDef
31	n/a	"def f(): pass",
32	n/a	# FunctionDef with arg
33	n/a	"def f(a): pass",
34	n/a	# FunctionDef with arg and default value
35	n/a	"def f(a=0): pass",
36	n/a	# FunctionDef with varargs
37	n/a	"def f(*args): pass",
38	n/a	# FunctionDef with kwargs
39	n/a	"def f(**kwargs): pass",
40	n/a	# FunctionDef with all kind of args
41	n/a	"def f(a, b=1, c=None, d=[], e={}, args, f=42, *kwargs): pass",
42	n/a	# ClassDef
43	n/a	"class C:pass",
44	n/a	# ClassDef, new style class
45	n/a	"class C(object): pass",
46	n/a	# Return
47	n/a	"def f():return 1",
48	n/a	# Delete
49	n/a	"del v",
50	n/a	# Assign
51	n/a	"v = 1",
52	n/a	# AugAssign
53	n/a	"v += 1",
54	n/a	# For
55	n/a	"for v in v:pass",
56	n/a	# While
57	n/a	"while v:pass",
58	n/a	# If
59	n/a	"if v:pass",
60	n/a	# With
61	n/a	"with x as y: pass",
62	n/a	"with x as y, z as q: pass",
63	n/a	# Raise
64	n/a	"raise Exception('string')",
65	n/a	# TryExcept
66	n/a	"try:\n pass\nexcept Exception:\n pass",
67	n/a	# TryFinally
68	n/a	"try:\n pass\nfinally:\n pass",
69	n/a	# Assert
70	n/a	"assert v",
71	n/a	# Import
72	n/a	"import sys",
73	n/a	# ImportFrom
74	n/a	"from sys import v",
75	n/a	# Global
76	n/a	"global v",
77	n/a	# Expr
78	n/a	"1",
79	n/a	# Pass,
80	n/a	"pass",
81	n/a	# Break
82	n/a	"for v in v:break",
83	n/a	# Continue
84	n/a	"for v in v:continue",
85	n/a	# for statements with naked tuples (see http://bugs.python.org/issue6704)
86	n/a	"for a,b in c: pass",
87	n/a	"[(a,b) for a,b in c]",
88	n/a	"((a,b) for a,b in c)",
89	n/a	"((a,b) for (a,b) in c)",
90	n/a	# Multiline generator expression (test for .lineno & .col_offset)
91	n/a	"""(
92	n/a	(
93	n/a	Aa
94	n/a	,
95	n/a	Bb
96	n/a	)
97	n/a	for
98	n/a	Aa
99	n/a	,
100	n/a	Bb in Cc
101	n/a	)""",
102	n/a	# dictcomp
103	n/a	"{a : b for w in x for m in p if g}",
104	n/a	# dictcomp with naked tuple
105	n/a	"{a : b for v,w in x}",
106	n/a	# setcomp
107	n/a	"{r for l in x if g}",
108	n/a	# setcomp with naked tuple
109	n/a	"{r for l,m in x}",
110	n/a	# AsyncFunctionDef
111	n/a	"async def f():\n await something()",
112	n/a	# AsyncFor
113	n/a	"async def f():\n async for e in i: 1\n else: 2",
114	n/a	# AsyncWith
115	n/a	"async def f():\n async with a as b: 1",
116	n/a	# PEP 448: Additional Unpacking Generalizations
117	n/a	"{**{1:2}, 2:3}",
118	n/a	"{*{1, 2}, 3}",
119	n/a	# Asynchronous comprehensions
120	n/a	"async def f():\n [i async for b in c]",
121	n/a	]
122	n/a
123	n/a	# These are compiled through "single"
124	n/a	# because of overlap with "eval", it just tests what
125	n/a	# can't be tested with "eval"
126	n/a	single_tests = [
127	n/a	"1+2"
128	n/a	]
129	n/a
130	n/a	# These are compiled through "eval"
131	n/a	# It should test all expressions
132	n/a	eval_tests = [
133	n/a	# None
134	n/a	"None",
135	n/a	# BoolOp
136	n/a	"a and b",
137	n/a	# BinOp
138	n/a	"a + b",
139	n/a	# UnaryOp
140	n/a	"not v",
141	n/a	# Lambda
142	n/a	"lambda:None",
143	n/a	# Dict
144	n/a	"{ 1:2 }",
145	n/a	# Empty dict
146	n/a	"{}",
147	n/a	# Set
148	n/a	"{None,}",
149	n/a	# Multiline dict (test for .lineno & .col_offset)
150	n/a	"""{
151	n/a	1
152	n/a	:
153	n/a	2
154	n/a	}""",
155	n/a	# ListComp
156	n/a	"[a for b in c if d]",
157	n/a	# GeneratorExp
158	n/a	"(a for b in c if d)",
159	n/a	# Yield - yield expressions can't work outside a function
160	n/a	#
161	n/a	# Compare
162	n/a	"1 < 2 < 3",
163	n/a	# Call
164	n/a	"f(1,2,c=3,d,*e)",
165	n/a	# Num
166	n/a	"10",
167	n/a	# Str
168	n/a	"'string'",
169	n/a	# Attribute
170	n/a	"a.b",
171	n/a	# Subscript
172	n/a	"a[b:c]",
173	n/a	# Name
174	n/a	"v",
175	n/a	# List
176	n/a	"[1,2,3]",
177	n/a	# Empty list
178	n/a	"[]",
179	n/a	# Tuple
180	n/a	"1,2,3",
181	n/a	# Tuple
182	n/a	"(1,2,3)",
183	n/a	# Empty tuple
184	n/a	"()",
185	n/a	# Combination
186	n/a	"a.b.c.d(a.b[1:2])",
187	n/a
188	n/a	]
189	n/a
190	n/a	# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
191	n/a	# excepthandler, arguments, keywords, alias
192	n/a
193	n/a	class AST_Tests(unittest.TestCase):
194	n/a
195	n/a	def _assertTrueorder(self, ast_node, parent_pos):
196	n/a	if not isinstance(ast_node, ast.AST) or ast_node._fields is None:
197	n/a	return
198	n/a	if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)):
199	n/a	node_pos = (ast_node.lineno, ast_node.col_offset)
200	n/a	self.assertTrue(node_pos >= parent_pos)
201	n/a	parent_pos = (ast_node.lineno, ast_node.col_offset)
202	n/a	for name in ast_node._fields:
203	n/a	value = getattr(ast_node, name)
204	n/a	if isinstance(value, list):
205	n/a	for child in value:
206	n/a	self._assertTrueorder(child, parent_pos)
207	n/a	elif value is not None:
208	n/a	self._assertTrueorder(value, parent_pos)
209	n/a
210	n/a	def test_AST_objects(self):
211	n/a	x = ast.AST()
212	n/a	self.assertEqual(x._fields, ())
213	n/a	x.foobar = 42
214	n/a	self.assertEqual(x.foobar, 42)
215	n/a	self.assertEqual(x.__dict__["foobar"], 42)
216	n/a
217	n/a	with self.assertRaises(AttributeError):
218	n/a	x.vararg
219	n/a
220	n/a	with self.assertRaises(TypeError):
221	n/a	# "_ast.AST constructor takes 0 positional arguments"
222	n/a	ast.AST(2)
223	n/a
224	n/a	def test_AST_garbage_collection(self):
225	n/a	class X:
226	n/a	pass
227	n/a	a = ast.AST()
228	n/a	a.x = X()
229	n/a	a.x.a = a
230	n/a	ref = weakref.ref(a.x)
231	n/a	del a
232	n/a	support.gc_collect()
233	n/a	self.assertIsNone(ref())
234	n/a
235	n/a	def test_snippets(self):
236	n/a	for input, output, kind in ((exec_tests, exec_results, "exec"),
237	n/a	(single_tests, single_results, "single"),
238	n/a	(eval_tests, eval_results, "eval")):
239	n/a	for i, o in zip(input, output):
240	n/a	with self.subTest(action="parsing", input=i):
241	n/a	ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST)
242	n/a	self.assertEqual(to_tuple(ast_tree), o)
243	n/a	self._assertTrueorder(ast_tree, (0, 0))
244	n/a	with self.subTest(action="compiling", input=i, kind=kind):
245	n/a	compile(ast_tree, "?", kind)
246	n/a
247	n/a	def test_slice(self):
248	n/a	slc = ast.parse("x[::]").body[0].value.slice
249	n/a	self.assertIsNone(slc.upper)
250	n/a	self.assertIsNone(slc.lower)
251	n/a	self.assertIsNone(slc.step)
252	n/a
253	n/a	def test_from_import(self):
254	n/a	im = ast.parse("from . import y").body[0]
255	n/a	self.assertIsNone(im.module)
256	n/a
257	n/a	def test_non_interned_future_from_ast(self):
258	n/a	mod = ast.parse("from __future__ import division")
259	n/a	self.assertIsInstance(mod.body[0], ast.ImportFrom)
260	n/a	mod.body[0].module = " __future__ ".strip()
261	n/a	compile(mod, "<test>", "exec")
262	n/a
263	n/a	def test_base_classes(self):
264	n/a	self.assertTrue(issubclass(ast.For, ast.stmt))
265	n/a	self.assertTrue(issubclass(ast.Name, ast.expr))
266	n/a	self.assertTrue(issubclass(ast.stmt, ast.AST))
267	n/a	self.assertTrue(issubclass(ast.expr, ast.AST))
268	n/a	self.assertTrue(issubclass(ast.comprehension, ast.AST))
269	n/a	self.assertTrue(issubclass(ast.Gt, ast.AST))
270	n/a
271	n/a	def test_field_attr_existence(self):
272	n/a	for name, item in ast.__dict__.items():
273	n/a	if isinstance(item, type) and name != 'AST' and name[0].isupper():
274	n/a	x = item()
275	n/a	if isinstance(x, ast.AST):
276	n/a	self.assertEqual(type(x._fields), tuple)
277	n/a
278	n/a	def test_arguments(self):
279	n/a	x = ast.arguments()
280	n/a	self.assertEqual(x._fields, ('args', 'vararg', 'kwonlyargs',
281	n/a	'kw_defaults', 'kwarg', 'defaults'))
282	n/a
283	n/a	with self.assertRaises(AttributeError):
284	n/a	x.vararg
285	n/a
286	n/a	x = ast.arguments(*range(1, 7))
287	n/a	self.assertEqual(x.vararg, 2)
288	n/a
289	n/a	def test_field_attr_writable(self):
290	n/a	x = ast.Num()
291	n/a	# We can assign to _fields
292	n/a	x._fields = 666
293	n/a	self.assertEqual(x._fields, 666)
294	n/a
295	n/a	def test_classattrs(self):
296	n/a	x = ast.Num()
297	n/a	self.assertEqual(x._fields, ('n',))
298	n/a
299	n/a	with self.assertRaises(AttributeError):
300	n/a	x.n
301	n/a
302	n/a	x = ast.Num(42)
303	n/a	self.assertEqual(x.n, 42)
304	n/a
305	n/a	with self.assertRaises(AttributeError):
306	n/a	x.lineno
307	n/a
308	n/a	with self.assertRaises(AttributeError):
309	n/a	x.foobar
310	n/a
311	n/a	x = ast.Num(lineno=2)
312	n/a	self.assertEqual(x.lineno, 2)
313	n/a
314	n/a	x = ast.Num(42, lineno=0)
315	n/a	self.assertEqual(x.lineno, 0)
316	n/a	self.assertEqual(x._fields, ('n',))
317	n/a	self.assertEqual(x.n, 42)
318	n/a
319	n/a	self.assertRaises(TypeError, ast.Num, 1, 2)
320	n/a	self.assertRaises(TypeError, ast.Num, 1, 2, lineno=0)
321	n/a
322	n/a	def test_module(self):
323	n/a	body = [ast.Num(42)]
324	n/a	x = ast.Module(body)
325	n/a	self.assertEqual(x.body, body)
326	n/a
327	n/a	def test_nodeclasses(self):
328	n/a	# Zero arguments constructor explicitly allowed
329	n/a	x = ast.BinOp()
330	n/a	self.assertEqual(x._fields, ('left', 'op', 'right'))
331	n/a
332	n/a	# Random attribute allowed too
333	n/a	x.foobarbaz = 5
334	n/a	self.assertEqual(x.foobarbaz, 5)
335	n/a
336	n/a	n1 = ast.Num(1)
337	n/a	n3 = ast.Num(3)
338	n/a	addop = ast.Add()
339	n/a	x = ast.BinOp(n1, addop, n3)
340	n/a	self.assertEqual(x.left, n1)
341	n/a	self.assertEqual(x.op, addop)
342	n/a	self.assertEqual(x.right, n3)
343	n/a
344	n/a	x = ast.BinOp(1, 2, 3)
345	n/a	self.assertEqual(x.left, 1)
346	n/a	self.assertEqual(x.op, 2)
347	n/a	self.assertEqual(x.right, 3)
348	n/a
349	n/a	x = ast.BinOp(1, 2, 3, lineno=0)
350	n/a	self.assertEqual(x.left, 1)
351	n/a	self.assertEqual(x.op, 2)
352	n/a	self.assertEqual(x.right, 3)
353	n/a	self.assertEqual(x.lineno, 0)
354	n/a
355	n/a	# node raises exception when not given enough arguments
356	n/a	self.assertRaises(TypeError, ast.BinOp, 1, 2)
357	n/a	# node raises exception when given too many arguments
358	n/a	self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4)
359	n/a	# node raises exception when not given enough arguments
360	n/a	self.assertRaises(TypeError, ast.BinOp, 1, 2, lineno=0)
361	n/a	# node raises exception when given too many arguments
362	n/a	self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4, lineno=0)
363	n/a
364	n/a	# can set attributes through kwargs too
365	n/a	x = ast.BinOp(left=1, op=2, right=3, lineno=0)
366	n/a	self.assertEqual(x.left, 1)
367	n/a	self.assertEqual(x.op, 2)
368	n/a	self.assertEqual(x.right, 3)
369	n/a	self.assertEqual(x.lineno, 0)
370	n/a
371	n/a	# Random kwargs also allowed
372	n/a	x = ast.BinOp(1, 2, 3, foobarbaz=42)
373	n/a	self.assertEqual(x.foobarbaz, 42)
374	n/a
375	n/a	def test_no_fields(self):
376	n/a	# this used to fail because Sub._fields was None
377	n/a	x = ast.Sub()
378	n/a	self.assertEqual(x._fields, ())
379	n/a
380	n/a	def test_pickling(self):
381	n/a	import pickle
382	n/a	mods = [pickle]
383	n/a	try:
384	n/a	import cPickle
385	n/a	mods.append(cPickle)
386	n/a	except ImportError:
387	n/a	pass
388	n/a	protocols = [0, 1, 2]
389	n/a	for mod in mods:
390	n/a	for protocol in protocols:
391	n/a	for ast in (compile(i, "?", "exec", 0x400) for i in exec_tests):
392	n/a	ast2 = mod.loads(mod.dumps(ast, protocol))
393	n/a	self.assertEqual(to_tuple(ast2), to_tuple(ast))
394	n/a
395	n/a	def test_invalid_sum(self):
396	n/a	pos = dict(lineno=2, col_offset=3)
397	n/a	m = ast.Module([ast.Expr(ast.expr(pos), pos)])
398	n/a	with self.assertRaises(TypeError) as cm:
399	n/a	compile(m, "<test>", "exec")
400	n/a	self.assertIn("but got <_ast.expr", str(cm.exception))
401	n/a
402	n/a	def test_invalid_identitifer(self):
403	n/a	m = ast.Module([ast.Expr(ast.Name(42, ast.Load()))])
404	n/a	ast.fix_missing_locations(m)
405	n/a	with self.assertRaises(TypeError) as cm:
406	n/a	compile(m, "<test>", "exec")
407	n/a	self.assertIn("identifier must be of type str", str(cm.exception))
408	n/a
409	n/a	def test_invalid_string(self):
410	n/a	m = ast.Module([ast.Expr(ast.Str(42))])
411	n/a	ast.fix_missing_locations(m)
412	n/a	with self.assertRaises(TypeError) as cm:
413	n/a	compile(m, "<test>", "exec")
414	n/a	self.assertIn("string must be of type str", str(cm.exception))
415	n/a
416	n/a	def test_empty_yield_from(self):
417	n/a	# Issue 16546: yield from value is not optional.
418	n/a	empty_yield_from = ast.parse("def f():\n yield from g()")
419	n/a	empty_yield_from.body[0].body[0].value.value = None
420	n/a	with self.assertRaises(ValueError) as cm:
421	n/a	compile(empty_yield_from, "<test>", "exec")
422	n/a	self.assertIn("field value is required", str(cm.exception))
423	n/a
424	n/a
425	n/a	class ASTHelpers_Test(unittest.TestCase):
426	n/a
427	n/a	def test_parse(self):
428	n/a	a = ast.parse('foo(1 + 1)')
429	n/a	b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST)
430	n/a	self.assertEqual(ast.dump(a), ast.dump(b))
431	n/a
432	n/a	def test_parse_in_error(self):
433	n/a	try:
434	n/a	1/0
435	n/a	except Exception:
436	n/a	with self.assertRaises(SyntaxError) as e:
437	n/a	ast.literal_eval(r"'\U'")
438	n/a	self.assertIsNotNone(e.exception.__context__)
439	n/a
440	n/a	def test_dump(self):
441	n/a	node = ast.parse('spam(eggs, "and cheese")')
442	n/a	self.assertEqual(ast.dump(node),
443	n/a	"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
444	n/a	"args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], "
445	n/a	"keywords=[]))])"
446	n/a	)
447	n/a	self.assertEqual(ast.dump(node, annotate_fields=False),
448	n/a	"Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
449	n/a	"Str('and cheese')], []))])"
450	n/a	)
451	n/a	self.assertEqual(ast.dump(node, include_attributes=True),
452	n/a	"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
453	n/a	"lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), "
454	n/a	"lineno=1, col_offset=5), Str(s='and cheese', lineno=1, "
455	n/a	"col_offset=11)], keywords=[], "
456	n/a	"lineno=1, col_offset=0), lineno=1, col_offset=0)])"
457	n/a	)
458	n/a
459	n/a	def test_copy_location(self):
460	n/a	src = ast.parse('1 + 1', mode='eval')
461	n/a	src.body.right = ast.copy_location(ast.Num(2), src.body.right)
462	n/a	self.assertEqual(ast.dump(src, include_attributes=True),
463	n/a	'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), '
464	n/a	'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, '
465	n/a	'col_offset=0))'
466	n/a	)
467	n/a
468	n/a	def test_fix_missing_locations(self):
469	n/a	src = ast.parse('write("spam")')
470	n/a	src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()),
471	n/a	[ast.Str('eggs')], [])))
472	n/a	self.assertEqual(src, ast.fix_missing_locations(src))
473	n/a	self.assertEqual(ast.dump(src, include_attributes=True),
474	n/a	"Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
475	n/a	"lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, "
476	n/a	"col_offset=6)], keywords=[], "
477	n/a	"lineno=1, col_offset=0), lineno=1, col_offset=0), "
478	n/a	"Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, "
479	n/a	"col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], "
480	n/a	"keywords=[], lineno=1, "
481	n/a	"col_offset=0), lineno=1, col_offset=0)])"
482	n/a	)
483	n/a
484	n/a	def test_increment_lineno(self):
485	n/a	src = ast.parse('1 + 1', mode='eval')
486	n/a	self.assertEqual(ast.increment_lineno(src, n=3), src)
487	n/a	self.assertEqual(ast.dump(src, include_attributes=True),
488	n/a	'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
489	n/a	'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
490	n/a	'col_offset=0))'
491	n/a	)
492	n/a	# issue10869: do not increment lineno of root twice
493	n/a	src = ast.parse('1 + 1', mode='eval')
494	n/a	self.assertEqual(ast.increment_lineno(src.body, n=3), src.body)
495	n/a	self.assertEqual(ast.dump(src, include_attributes=True),
496	n/a	'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
497	n/a	'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
498	n/a	'col_offset=0))'
499	n/a	)
500	n/a
501	n/a	def test_iter_fields(self):
502	n/a	node = ast.parse('foo()', mode='eval')
503	n/a	d = dict(ast.iter_fields(node.body))
504	n/a	self.assertEqual(d.pop('func').id, 'foo')
505	n/a	self.assertEqual(d, {'keywords': [], 'args': []})
506	n/a
507	n/a	def test_iter_child_nodes(self):
508	n/a	node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
509	n/a	self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
510	n/a	iterator = ast.iter_child_nodes(node.body)
511	n/a	self.assertEqual(next(iterator).id, 'spam')
512	n/a	self.assertEqual(next(iterator).n, 23)
513	n/a	self.assertEqual(next(iterator).n, 42)
514	n/a	self.assertEqual(ast.dump(next(iterator)),
515	n/a	"keyword(arg='eggs', value=Str(s='leek'))"
516	n/a	)
517	n/a
518	n/a	def test_get_docstring(self):
519	n/a	node = ast.parse('def foo():\n """line one\n line two"""')
520	n/a	self.assertEqual(ast.get_docstring(node.body[0]),
521	n/a	'line one\nline two')
522	n/a
523	n/a	node = ast.parse('async def foo():\n """spam\n ham"""')
524	n/a	self.assertEqual(ast.get_docstring(node.body[0]), 'spam\nham')
525	n/a
526	n/a	def test_literal_eval(self):
527	n/a	self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
528	n/a	self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
529	n/a	self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None))
530	n/a	self.assertEqual(ast.literal_eval('{1, 2, 3}'), {1, 2, 3})
531	n/a	self.assertEqual(ast.literal_eval('b"hi"'), b"hi")
532	n/a	self.assertRaises(ValueError, ast.literal_eval, 'foo()')
533	n/a	self.assertEqual(ast.literal_eval('-6'), -6)
534	n/a	self.assertEqual(ast.literal_eval('-6j+3'), 3-6j)
535	n/a	self.assertEqual(ast.literal_eval('3.25'), 3.25)
536	n/a
537	n/a	def test_literal_eval_issue4907(self):
538	n/a	self.assertEqual(ast.literal_eval('2j'), 2j)
539	n/a	self.assertEqual(ast.literal_eval('10 + 2j'), 10 + 2j)
540	n/a	self.assertEqual(ast.literal_eval('1.5 - 2j'), 1.5 - 2j)
541	n/a
542	n/a	def test_bad_integer(self):
543	n/a	# issue13436: Bad error message with invalid numeric values
544	n/a	body = [ast.ImportFrom(module='time',
545	n/a	names=[ast.alias(name='sleep')],
546	n/a	level=None,
547	n/a	lineno=None, col_offset=None)]
548	n/a	mod = ast.Module(body)
549	n/a	with self.assertRaises(ValueError) as cm:
550	n/a	compile(mod, 'test', 'exec')
551	n/a	self.assertIn("invalid integer value: None", str(cm.exception))
552	n/a
553	n/a	def test_level_as_none(self):
554	n/a	body = [ast.ImportFrom(module='time',
555	n/a	names=[ast.alias(name='sleep')],
556	n/a	level=None,
557	n/a	lineno=0, col_offset=0)]
558	n/a	mod = ast.Module(body)
559	n/a	code = compile(mod, 'test', 'exec')
560	n/a	ns = {}
561	n/a	exec(code, ns)
562	n/a	self.assertIn('sleep', ns)
563	n/a
564	n/a
565	n/a	class ASTValidatorTests(unittest.TestCase):
566	n/a
567	n/a	def mod(self, mod, msg=None, mode="exec", *, exc=ValueError):
568	n/a	mod.lineno = mod.col_offset = 0
569	n/a	ast.fix_missing_locations(mod)
570	n/a	with self.assertRaises(exc) as cm:
571	n/a	compile(mod, "<test>", mode)
572	n/a	if msg is not None:
573	n/a	self.assertIn(msg, str(cm.exception))
574	n/a
575	n/a	def expr(self, node, msg=None, *, exc=ValueError):
576	n/a	mod = ast.Module([ast.Expr(node)])
577	n/a	self.mod(mod, msg, exc=exc)
578	n/a
579	n/a	def stmt(self, stmt, msg=None):
580	n/a	mod = ast.Module([stmt])
581	n/a	self.mod(mod, msg)
582	n/a
583	n/a	def test_module(self):
584	n/a	m = ast.Interactive([ast.Expr(ast.Name("x", ast.Store()))])
585	n/a	self.mod(m, "must have Load context", "single")
586	n/a	m = ast.Expression(ast.Name("x", ast.Store()))
587	n/a	self.mod(m, "must have Load context", "eval")
588	n/a
589	n/a	def _check_arguments(self, fac, check):
590	n/a	def arguments(args=None, vararg=None,
591	n/a	kwonlyargs=None, kwarg=None,
592	n/a	defaults=None, kw_defaults=None):
593	n/a	if args is None:
594	n/a	args = []
595	n/a	if kwonlyargs is None:
596	n/a	kwonlyargs = []
597	n/a	if defaults is None:
598	n/a	defaults = []
599	n/a	if kw_defaults is None:
600	n/a	kw_defaults = []
601	n/a	args = ast.arguments(args, vararg, kwonlyargs, kw_defaults,
602	n/a	kwarg, defaults)
603	n/a	return fac(args)
604	n/a	args = [ast.arg("x", ast.Name("x", ast.Store()))]
605	n/a	check(arguments(args=args), "must have Load context")
606	n/a	check(arguments(kwonlyargs=args), "must have Load context")
607	n/a	check(arguments(defaults=[ast.Num(3)]),
608	n/a	"more positional defaults than args")
609	n/a	check(arguments(kw_defaults=[ast.Num(4)]),
610	n/a	"length of kwonlyargs is not the same as kw_defaults")
611	n/a	args = [ast.arg("x", ast.Name("x", ast.Load()))]
612	n/a	check(arguments(args=args, defaults=[ast.Name("x", ast.Store())]),
613	n/a	"must have Load context")
614	n/a	args = [ast.arg("a", ast.Name("x", ast.Load())),
615	n/a	ast.arg("b", ast.Name("y", ast.Load()))]
616	n/a	check(arguments(kwonlyargs=args,
617	n/a	kw_defaults=[None, ast.Name("x", ast.Store())]),
618	n/a	"must have Load context")
619	n/a
620	n/a	def test_funcdef(self):
621	n/a	a = ast.arguments([], None, [], [], None, [])
622	n/a	f = ast.FunctionDef("x", a, [], [], None)
623	n/a	self.stmt(f, "empty body on FunctionDef")
624	n/a	f = ast.FunctionDef("x", a, [ast.Pass()], [ast.Name("x", ast.Store())],
625	n/a	None)
626	n/a	self.stmt(f, "must have Load context")
627	n/a	f = ast.FunctionDef("x", a, [ast.Pass()], [],
628	n/a	ast.Name("x", ast.Store()))
629	n/a	self.stmt(f, "must have Load context")
630	n/a	def fac(args):
631	n/a	return ast.FunctionDef("x", args, [ast.Pass()], [], None)
632	n/a	self._check_arguments(fac, self.stmt)
633	n/a
634	n/a	def test_classdef(self):
635	n/a	def cls(bases=None, keywords=None, body=None, decorator_list=None):
636	n/a	if bases is None:
637	n/a	bases = []
638	n/a	if keywords is None:
639	n/a	keywords = []
640	n/a	if body is None:
641	n/a	body = [ast.Pass()]
642	n/a	if decorator_list is None:
643	n/a	decorator_list = []
644	n/a	return ast.ClassDef("myclass", bases, keywords,
645	n/a	body, decorator_list)
646	n/a	self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
647	n/a	"must have Load context")
648	n/a	self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
649	n/a	"must have Load context")
650	n/a	self.stmt(cls(body=[]), "empty body on ClassDef")
651	n/a	self.stmt(cls(body=[None]), "None disallowed")
652	n/a	self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
653	n/a	"must have Load context")
654	n/a
655	n/a	def test_delete(self):
656	n/a	self.stmt(ast.Delete([]), "empty targets on Delete")
657	n/a	self.stmt(ast.Delete([None]), "None disallowed")
658	n/a	self.stmt(ast.Delete([ast.Name("x", ast.Load())]),
659	n/a	"must have Del context")
660	n/a
661	n/a	def test_assign(self):
662	n/a	self.stmt(ast.Assign([], ast.Num(3)), "empty targets on Assign")
663	n/a	self.stmt(ast.Assign([None], ast.Num(3)), "None disallowed")
664	n/a	self.stmt(ast.Assign([ast.Name("x", ast.Load())], ast.Num(3)),
665	n/a	"must have Store context")
666	n/a	self.stmt(ast.Assign([ast.Name("x", ast.Store())],
667	n/a	ast.Name("y", ast.Store())),
668	n/a	"must have Load context")
669	n/a
670	n/a	def test_augassign(self):
671	n/a	aug = ast.AugAssign(ast.Name("x", ast.Load()), ast.Add(),
672	n/a	ast.Name("y", ast.Load()))
673	n/a	self.stmt(aug, "must have Store context")
674	n/a	aug = ast.AugAssign(ast.Name("x", ast.Store()), ast.Add(),
675	n/a	ast.Name("y", ast.Store()))
676	n/a	self.stmt(aug, "must have Load context")
677	n/a
678	n/a	def test_for(self):
679	n/a	x = ast.Name("x", ast.Store())
680	n/a	y = ast.Name("y", ast.Load())
681	n/a	p = ast.Pass()
682	n/a	self.stmt(ast.For(x, y, [], []), "empty body on For")
683	n/a	self.stmt(ast.For(ast.Name("x", ast.Load()), y, [p], []),
684	n/a	"must have Store context")
685	n/a	self.stmt(ast.For(x, ast.Name("y", ast.Store()), [p], []),
686	n/a	"must have Load context")
687	n/a	e = ast.Expr(ast.Name("x", ast.Store()))
688	n/a	self.stmt(ast.For(x, y, [e], []), "must have Load context")
689	n/a	self.stmt(ast.For(x, y, [p], [e]), "must have Load context")
690	n/a
691	n/a	def test_while(self):
692	n/a	self.stmt(ast.While(ast.Num(3), [], []), "empty body on While")
693	n/a	self.stmt(ast.While(ast.Name("x", ast.Store()), [ast.Pass()], []),
694	n/a	"must have Load context")
695	n/a	self.stmt(ast.While(ast.Num(3), [ast.Pass()],
696	n/a	[ast.Expr(ast.Name("x", ast.Store()))]),
697	n/a	"must have Load context")
698	n/a
699	n/a	def test_if(self):
700	n/a	self.stmt(ast.If(ast.Num(3), [], []), "empty body on If")
701	n/a	i = ast.If(ast.Name("x", ast.Store()), [ast.Pass()], [])
702	n/a	self.stmt(i, "must have Load context")
703	n/a	i = ast.If(ast.Num(3), [ast.Expr(ast.Name("x", ast.Store()))], [])
704	n/a	self.stmt(i, "must have Load context")
705	n/a	i = ast.If(ast.Num(3), [ast.Pass()],
706	n/a	[ast.Expr(ast.Name("x", ast.Store()))])
707	n/a	self.stmt(i, "must have Load context")
708	n/a
709	n/a	def test_with(self):
710	n/a	p = ast.Pass()
711	n/a	self.stmt(ast.With([], [p]), "empty items on With")
712	n/a	i = ast.withitem(ast.Num(3), None)
713	n/a	self.stmt(ast.With([i], []), "empty body on With")
714	n/a	i = ast.withitem(ast.Name("x", ast.Store()), None)
715	n/a	self.stmt(ast.With([i], [p]), "must have Load context")
716	n/a	i = ast.withitem(ast.Num(3), ast.Name("x", ast.Load()))
717	n/a	self.stmt(ast.With([i], [p]), "must have Store context")
718	n/a
719	n/a	def test_raise(self):
720	n/a	r = ast.Raise(None, ast.Num(3))
721	n/a	self.stmt(r, "Raise with cause but no exception")
722	n/a	r = ast.Raise(ast.Name("x", ast.Store()), None)
723	n/a	self.stmt(r, "must have Load context")
724	n/a	r = ast.Raise(ast.Num(4), ast.Name("x", ast.Store()))
725	n/a	self.stmt(r, "must have Load context")
726	n/a
727	n/a	def test_try(self):
728	n/a	p = ast.Pass()
729	n/a	t = ast.Try([], [], [], [p])
730	n/a	self.stmt(t, "empty body on Try")
731	n/a	t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
732	n/a	self.stmt(t, "must have Load context")
733	n/a	t = ast.Try([p], [], [], [])
734	n/a	self.stmt(t, "Try has neither except handlers nor finalbody")
735	n/a	t = ast.Try([p], [], [p], [p])
736	n/a	self.stmt(t, "Try has orelse but no except handlers")
737	n/a	t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
738	n/a	self.stmt(t, "empty body on ExceptHandler")
739	n/a	e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
740	n/a	self.stmt(ast.Try([p], e, [], []), "must have Load context")
741	n/a	e = [ast.ExceptHandler(None, "x", [p])]
742	n/a	t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
743	n/a	self.stmt(t, "must have Load context")
744	n/a	t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
745	n/a	self.stmt(t, "must have Load context")
746	n/a
747	n/a	def test_assert(self):
748	n/a	self.stmt(ast.Assert(ast.Name("x", ast.Store()), None),
749	n/a	"must have Load context")
750	n/a	assrt = ast.Assert(ast.Name("x", ast.Load()),
751	n/a	ast.Name("y", ast.Store()))
752	n/a	self.stmt(assrt, "must have Load context")
753	n/a
754	n/a	def test_import(self):
755	n/a	self.stmt(ast.Import([]), "empty names on Import")
756	n/a
757	n/a	def test_importfrom(self):
758	n/a	imp = ast.ImportFrom(None, [ast.alias("x", None)], -42)
759	n/a	self.stmt(imp, "Negative ImportFrom level")
760	n/a	self.stmt(ast.ImportFrom(None, [], 0), "empty names on ImportFrom")
761	n/a
762	n/a	def test_global(self):
763	n/a	self.stmt(ast.Global([]), "empty names on Global")
764	n/a
765	n/a	def test_nonlocal(self):
766	n/a	self.stmt(ast.Nonlocal([]), "empty names on Nonlocal")
767	n/a
768	n/a	def test_expr(self):
769	n/a	e = ast.Expr(ast.Name("x", ast.Store()))
770	n/a	self.stmt(e, "must have Load context")
771	n/a
772	n/a	def test_boolop(self):
773	n/a	b = ast.BoolOp(ast.And(), [])
774	n/a	self.expr(b, "less than 2 values")
775	n/a	b = ast.BoolOp(ast.And(), [ast.Num(3)])
776	n/a	self.expr(b, "less than 2 values")
777	n/a	b = ast.BoolOp(ast.And(), [ast.Num(4), None])
778	n/a	self.expr(b, "None disallowed")
779	n/a	b = ast.BoolOp(ast.And(), [ast.Num(4), ast.Name("x", ast.Store())])
780	n/a	self.expr(b, "must have Load context")
781	n/a
782	n/a	def test_unaryop(self):
783	n/a	u = ast.UnaryOp(ast.Not(), ast.Name("x", ast.Store()))
784	n/a	self.expr(u, "must have Load context")
785	n/a
786	n/a	def test_lambda(self):
787	n/a	a = ast.arguments([], None, [], [], None, [])
788	n/a	self.expr(ast.Lambda(a, ast.Name("x", ast.Store())),
789	n/a	"must have Load context")
790	n/a	def fac(args):
791	n/a	return ast.Lambda(args, ast.Name("x", ast.Load()))
792	n/a	self._check_arguments(fac, self.expr)
793	n/a
794	n/a	def test_ifexp(self):
795	n/a	l = ast.Name("x", ast.Load())
796	n/a	s = ast.Name("y", ast.Store())
797	n/a	for args in (s, l, l), (l, s, l), (l, l, s):
798	n/a	self.expr(ast.IfExp(*args), "must have Load context")
799	n/a
800	n/a	def test_dict(self):
801	n/a	d = ast.Dict([], [ast.Name("x", ast.Load())])
802	n/a	self.expr(d, "same number of keys as values")
803	n/a	d = ast.Dict([ast.Name("x", ast.Load())], [None])
804	n/a	self.expr(d, "None disallowed")
805	n/a
806	n/a	def test_set(self):
807	n/a	self.expr(ast.Set([None]), "None disallowed")
808	n/a	s = ast.Set([ast.Name("x", ast.Store())])
809	n/a	self.expr(s, "must have Load context")
810	n/a
811	n/a	def _check_comprehension(self, fac):
812	n/a	self.expr(fac([]), "comprehension with no generators")
813	n/a	g = ast.comprehension(ast.Name("x", ast.Load()),
814	n/a	ast.Name("x", ast.Load()), [], 0)
815	n/a	self.expr(fac([g]), "must have Store context")
816	n/a	g = ast.comprehension(ast.Name("x", ast.Store()),
817	n/a	ast.Name("x", ast.Store()), [], 0)
818	n/a	self.expr(fac([g]), "must have Load context")
819	n/a	x = ast.Name("x", ast.Store())
820	n/a	y = ast.Name("y", ast.Load())
821	n/a	g = ast.comprehension(x, y, [None], 0)
822	n/a	self.expr(fac([g]), "None disallowed")
823	n/a	g = ast.comprehension(x, y, [ast.Name("x", ast.Store())], 0)
824	n/a	self.expr(fac([g]), "must have Load context")
825	n/a
826	n/a	def _simple_comp(self, fac):
827	n/a	g = ast.comprehension(ast.Name("x", ast.Store()),
828	n/a	ast.Name("x", ast.Load()), [], 0)
829	n/a	self.expr(fac(ast.Name("x", ast.Store()), [g]),
830	n/a	"must have Load context")
831	n/a	def wrap(gens):
832	n/a	return fac(ast.Name("x", ast.Store()), gens)
833	n/a	self._check_comprehension(wrap)
834	n/a
835	n/a	def test_listcomp(self):
836	n/a	self._simple_comp(ast.ListComp)
837	n/a
838	n/a	def test_setcomp(self):
839	n/a	self._simple_comp(ast.SetComp)
840	n/a
841	n/a	def test_generatorexp(self):
842	n/a	self._simple_comp(ast.GeneratorExp)
843	n/a
844	n/a	def test_dictcomp(self):
845	n/a	g = ast.comprehension(ast.Name("y", ast.Store()),
846	n/a	ast.Name("p", ast.Load()), [], 0)
847	n/a	c = ast.DictComp(ast.Name("x", ast.Store()),
848	n/a	ast.Name("y", ast.Load()), [g])
849	n/a	self.expr(c, "must have Load context")
850	n/a	c = ast.DictComp(ast.Name("x", ast.Load()),
851	n/a	ast.Name("y", ast.Store()), [g])
852	n/a	self.expr(c, "must have Load context")
853	n/a	def factory(comps):
854	n/a	k = ast.Name("x", ast.Load())
855	n/a	v = ast.Name("y", ast.Load())
856	n/a	return ast.DictComp(k, v, comps)
857	n/a	self._check_comprehension(factory)
858	n/a
859	n/a	def test_yield(self):
860	n/a	self.expr(ast.Yield(ast.Name("x", ast.Store())), "must have Load")
861	n/a	self.expr(ast.YieldFrom(ast.Name("x", ast.Store())), "must have Load")
862	n/a
863	n/a	def test_compare(self):
864	n/a	left = ast.Name("x", ast.Load())
865	n/a	comp = ast.Compare(left, [ast.In()], [])
866	n/a	self.expr(comp, "no comparators")
867	n/a	comp = ast.Compare(left, [ast.In()], [ast.Num(4), ast.Num(5)])
868	n/a	self.expr(comp, "different number of comparators and operands")
869	n/a	comp = ast.Compare(ast.Num("blah"), [ast.In()], [left])
870	n/a	self.expr(comp, "non-numeric", exc=TypeError)
871	n/a	comp = ast.Compare(left, [ast.In()], [ast.Num("blah")])
872	n/a	self.expr(comp, "non-numeric", exc=TypeError)
873	n/a
874	n/a	def test_call(self):
875	n/a	func = ast.Name("x", ast.Load())
876	n/a	args = [ast.Name("y", ast.Load())]
877	n/a	keywords = [ast.keyword("w", ast.Name("z", ast.Load()))]
878	n/a	call = ast.Call(ast.Name("x", ast.Store()), args, keywords)
879	n/a	self.expr(call, "must have Load context")
880	n/a	call = ast.Call(func, [None], keywords)
881	n/a	self.expr(call, "None disallowed")
882	n/a	bad_keywords = [ast.keyword("w", ast.Name("z", ast.Store()))]
883	n/a	call = ast.Call(func, args, bad_keywords)
884	n/a	self.expr(call, "must have Load context")
885	n/a
886	n/a	def test_num(self):
887	n/a	class subint(int):
888	n/a	pass
889	n/a	class subfloat(float):
890	n/a	pass
891	n/a	class subcomplex(complex):
892	n/a	pass
893	n/a	for obj in "0", "hello", subint(), subfloat(), subcomplex():
894	n/a	self.expr(ast.Num(obj), "non-numeric", exc=TypeError)
895	n/a
896	n/a	def test_attribute(self):
897	n/a	attr = ast.Attribute(ast.Name("x", ast.Store()), "y", ast.Load())
898	n/a	self.expr(attr, "must have Load context")
899	n/a
900	n/a	def test_subscript(self):
901	n/a	sub = ast.Subscript(ast.Name("x", ast.Store()), ast.Index(ast.Num(3)),
902	n/a	ast.Load())
903	n/a	self.expr(sub, "must have Load context")
904	n/a	x = ast.Name("x", ast.Load())
905	n/a	sub = ast.Subscript(x, ast.Index(ast.Name("y", ast.Store())),
906	n/a	ast.Load())
907	n/a	self.expr(sub, "must have Load context")
908	n/a	s = ast.Name("x", ast.Store())
909	n/a	for args in (s, None, None), (None, s, None), (None, None, s):
910	n/a	sl = ast.Slice(*args)
911	n/a	self.expr(ast.Subscript(x, sl, ast.Load()),
912	n/a	"must have Load context")
913	n/a	sl = ast.ExtSlice([])
914	n/a	self.expr(ast.Subscript(x, sl, ast.Load()), "empty dims on ExtSlice")
915	n/a	sl = ast.ExtSlice([ast.Index(s)])
916	n/a	self.expr(ast.Subscript(x, sl, ast.Load()), "must have Load context")
917	n/a
918	n/a	def test_starred(self):
919	n/a	left = ast.List([ast.Starred(ast.Name("x", ast.Load()), ast.Store())],
920	n/a	ast.Store())
921	n/a	assign = ast.Assign([left], ast.Num(4))
922	n/a	self.stmt(assign, "must have Store context")
923	n/a
924	n/a	def _sequence(self, fac):
925	n/a	self.expr(fac([None], ast.Load()), "None disallowed")
926	n/a	self.expr(fac([ast.Name("x", ast.Store())], ast.Load()),
927	n/a	"must have Load context")
928	n/a
929	n/a	def test_list(self):
930	n/a	self._sequence(ast.List)
931	n/a
932	n/a	def test_tuple(self):
933	n/a	self._sequence(ast.Tuple)
934	n/a
935	n/a	def test_nameconstant(self):
936	n/a	self.expr(ast.NameConstant(4), "singleton must be True, False, or None")
937	n/a
938	n/a	def test_stdlib_validates(self):
939	n/a	stdlib = os.path.dirname(ast.__file__)
940	n/a	tests = [fn for fn in os.listdir(stdlib) if fn.endswith(".py")]
941	n/a	tests.extend(["test/test_grammar.py", "test/test_unpack_ex.py"])
942	n/a	for module in tests:
943	n/a	fn = os.path.join(stdlib, module)
944	n/a	with open(fn, "r", encoding="utf-8") as fp:
945	n/a	source = fp.read()
946	n/a	mod = ast.parse(source, fn)
947	n/a	compile(mod, fn, "exec")
948	n/a
949	n/a
950	n/a	class ConstantTests(unittest.TestCase):
951	n/a	"""Tests on the ast.Constant node type."""
952	n/a
953	n/a	def compile_constant(self, value):
954	n/a	tree = ast.parse("x = 123")
955	n/a
956	n/a	node = tree.body[0].value
957	n/a	new_node = ast.Constant(value=value)
958	n/a	ast.copy_location(new_node, node)
959	n/a	tree.body[0].value = new_node
960	n/a
961	n/a	code = compile(tree, "<string>", "exec")
962	n/a
963	n/a	ns = {}
964	n/a	exec(code, ns)
965	n/a	return ns['x']
966	n/a
967	n/a	def test_validation(self):
968	n/a	with self.assertRaises(TypeError) as cm:
969	n/a	self.compile_constant([1, 2, 3])
970	n/a	self.assertEqual(str(cm.exception),
971	n/a	"got an invalid type in Constant: list")
972	n/a
973	n/a	def test_singletons(self):
974	n/a	for const in (None, False, True, Ellipsis, b'', frozenset()):
975	n/a	with self.subTest(const=const):
976	n/a	value = self.compile_constant(const)
977	n/a	self.assertIs(value, const)
978	n/a
979	n/a	def test_values(self):
980	n/a	nested_tuple = (1,)
981	n/a	nested_frozenset = frozenset({1})
982	n/a	for level in range(3):
983	n/a	nested_tuple = (nested_tuple, 2)
984	n/a	nested_frozenset = frozenset({nested_frozenset, 2})
985	n/a	values = (123, 123.0, 123j,
986	n/a	"unicode", b'bytes',
987	n/a	tuple("tuple"), frozenset("frozenset"),
988	n/a	nested_tuple, nested_frozenset)
989	n/a	for value in values:
990	n/a	with self.subTest(value=value):
991	n/a	result = self.compile_constant(value)
992	n/a	self.assertEqual(result, value)
993	n/a
994	n/a	def test_assign_to_constant(self):
995	n/a	tree = ast.parse("x = 1")
996	n/a
997	n/a	target = tree.body[0].targets[0]
998	n/a	new_target = ast.Constant(value=1)
999	n/a	ast.copy_location(new_target, target)
1000	n/a	tree.body[0].targets[0] = new_target
1001	n/a
1002	n/a	with self.assertRaises(ValueError) as cm:
1003	n/a	compile(tree, "string", "exec")
1004	n/a	self.assertEqual(str(cm.exception),
1005	n/a	"expression which can't be assigned "
1006	n/a	"to in Store context")
1007	n/a
1008	n/a	def test_get_docstring(self):
1009	n/a	tree = ast.parse("'docstring'\nx = 1")
1010	n/a	self.assertEqual(ast.get_docstring(tree), 'docstring')
1011	n/a
1012	n/a	tree.body[0].value = ast.Constant(value='constant docstring')
1013	n/a	self.assertEqual(ast.get_docstring(tree), 'constant docstring')
1014	n/a
1015	n/a	def get_load_const(self, tree):
1016	n/a	# Compile to bytecode, disassemble and get parameter of LOAD_CONST
1017	n/a	# instructions
1018	n/a	co = compile(tree, '<string>', 'exec')
1019	n/a	consts = []
1020	n/a	for instr in dis.get_instructions(co):
1021	n/a	if instr.opname == 'LOAD_CONST':
1022	n/a	consts.append(instr.argval)
1023	n/a	return consts
1024	n/a
1025	n/a	@support.cpython_only
1026	n/a	def test_load_const(self):
1027	n/a	consts = [None,
1028	n/a	True, False,
1029	n/a	124,
1030	n/a	2.0,
1031	n/a	3j,
1032	n/a	"unicode",
1033	n/a	b'bytes',
1034	n/a	(1, 2, 3)]
1035	n/a
1036	n/a	code = '\n'.join(['x={!r}'.format(const) for const in consts])
1037	n/a	code += '\nx = ...'
1038	n/a	consts.extend((Ellipsis, None))
1039	n/a
1040	n/a	tree = ast.parse(code)
1041	n/a	self.assertEqual(self.get_load_const(tree),
1042	n/a	consts)
1043	n/a
1044	n/a	# Replace expression nodes with constants
1045	n/a	for assign, const in zip(tree.body, consts):
1046	n/a	assert isinstance(assign, ast.Assign), ast.dump(assign)
1047	n/a	new_node = ast.Constant(value=const)
1048	n/a	ast.copy_location(new_node, assign.value)
1049	n/a	assign.value = new_node
1050	n/a
1051	n/a	self.assertEqual(self.get_load_const(tree),
1052	n/a	consts)
1053	n/a
1054	n/a	def test_literal_eval(self):
1055	n/a	tree = ast.parse("1 + 2")
1056	n/a	binop = tree.body[0].value
1057	n/a
1058	n/a	new_left = ast.Constant(value=10)
1059	n/a	ast.copy_location(new_left, binop.left)
1060	n/a	binop.left = new_left
1061	n/a
1062	n/a	new_right = ast.Constant(value=20)
1063	n/a	ast.copy_location(new_right, binop.right)
1064	n/a	binop.right = new_right
1065	n/a
1066	n/a	self.assertEqual(ast.literal_eval(binop), 30)
1067	n/a
1068	n/a
1069	n/a	def main():
1070	n/a	if __name__ != '__main__':
1071	n/a	return
1072	n/a	if sys.argv[1:] == ['-g']:
1073	n/a	for statements, kind in ((exec_tests, "exec"), (single_tests, "single"),
1074	n/a	(eval_tests, "eval")):
1075	n/a	print(kind+"_results = [")
1076	n/a	for statement in statements:
1077	n/a	tree = ast.parse(statement, "?", kind)
1078	n/a	print("%r," % (to_tuple(tree),))
1079	n/a	print("]")
1080	n/a	print("main()")
1081	n/a	raise SystemExit
1082	n/a	unittest.main()
1083	n/a
1084	n/a	#### EVERYTHING BELOW IS GENERATED #####
1085	n/a	exec_results = [
1086	n/a	('Module', [('Expr', (1, 0), ('NameConstant', (1, 0), None))]),
1087	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Pass', (1, 9))], [], None)]),
1088	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None)], None, [], [], None, []), [('Pass', (1, 10))], [], None)]),
1089	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None)], None, [], [], None, [('Num', (1, 8), 0)]), [('Pass', (1, 12))], [], None)]),
1090	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], ('arg', (1, 7), 'args', None), [], [], None, []), [('Pass', (1, 14))], [], None)]),
1091	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], ('arg', (1, 8), 'kwargs', None), []), [('Pass', (1, 17))], [], None)]),
1092	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None), ('arg', (1, 9), 'b', None), ('arg', (1, 14), 'c', None), ('arg', (1, 22), 'd', None), ('arg', (1, 28), 'e', None)], ('arg', (1, 35), 'args', None), [('arg', (1, 41), 'f', None)], [('Num', (1, 43), 42)], ('arg', (1, 49), 'kwargs', None), [('Num', (1, 11), 1), ('NameConstant', (1, 16), None), ('List', (1, 24), [], ('Load',)), ('Dict', (1, 30), [], [])]), [('Pass', (1, 58))], [], None)]),
1093	n/a	('Module', [('ClassDef', (1, 0), 'C', [], [], [('Pass', (1, 8))], [])]),
1094	n/a	('Module', [('ClassDef', (1, 0), 'C', [('Name', (1, 8), 'object', ('Load',))], [], [('Pass', (1, 17))], [])]),
1095	n/a	('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Return', (1, 8), ('Num', (1, 15), 1))], [], None)]),
1096	n/a	('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
1097	n/a	('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
1098	n/a	('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Num', (1, 5), 1))]),
1099	n/a	('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Pass', (1, 11))], [])]),
1100	n/a	('Module', [('While', (1, 0), ('Name', (1, 6), 'v', ('Load',)), [('Pass', (1, 8))], [])]),
1101	n/a	('Module', [('If', (1, 0), ('Name', (1, 3), 'v', ('Load',)), [('Pass', (1, 5))], [])]),
1102	n/a	('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',)))], [('Pass', (1, 13))])]),
1103	n/a	('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',))), ('withitem', ('Name', (1, 13), 'z', ('Load',)), ('Name', (1, 18), 'q', ('Store',)))], [('Pass', (1, 21))])]),
1104	n/a	('Module', [('Raise', (1, 0), ('Call', (1, 6), ('Name', (1, 6), 'Exception', ('Load',)), [('Str', (1, 16), 'string')], []), None)]),
1105	n/a	('Module', [('Try', (1, 0), [('Pass', (2, 2))], [('ExceptHandler', (3, 0), ('Name', (3, 7), 'Exception', ('Load',)), None, [('Pass', (4, 2))])], [], [])]),
1106	n/a	('Module', [('Try', (1, 0), [('Pass', (2, 2))], [], [], [('Pass', (4, 2))])]),
1107	n/a	('Module', [('Assert', (1, 0), ('Name', (1, 7), 'v', ('Load',)), None)]),
1108	n/a	('Module', [('Import', (1, 0), [('alias', 'sys', None)])]),
1109	n/a	('Module', [('ImportFrom', (1, 0), 'sys', [('alias', 'v', None)], 0)]),
1110	n/a	('Module', [('Global', (1, 0), ['v'])]),
1111	n/a	('Module', [('Expr', (1, 0), ('Num', (1, 0), 1))]),
1112	n/a	('Module', [('Pass', (1, 0))]),
1113	n/a	('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Break', (1, 11))], [])]),
1114	n/a	('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Continue', (1, 11))], [])]),
1115	n/a	('Module', [('For', (1, 0), ('Tuple', (1, 4), [('Name', (1, 4), 'a', ('Store',)), ('Name', (1, 6), 'b', ('Store',))], ('Store',)), ('Name', (1, 11), 'c', ('Load',)), [('Pass', (1, 14))], [])]),
1116	n/a	('Module', [('Expr', (1, 0), ('ListComp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [], 0)]))]),
1117	n/a	('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [], 0)]))]),
1118	n/a	('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 12), [('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 20), 'c', ('Load',)), [], 0)]))]),
1119	n/a	('Module', [('Expr', (1, 0), ('GeneratorExp', (2, 4), ('Tuple', (3, 4), [('Name', (3, 4), 'Aa', ('Load',)), ('Name', (5, 7), 'Bb', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (8, 4), [('Name', (8, 4), 'Aa', ('Store',)), ('Name', (10, 4), 'Bb', ('Store',))], ('Store',)), ('Name', (10, 10), 'Cc', ('Load',)), [], 0)]))]),
1120	n/a	('Module', [('Expr', (1, 0), ('DictComp', (1, 0), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Name', (1, 11), 'w', ('Store',)), ('Name', (1, 16), 'x', ('Load',)), [], 0), ('comprehension', ('Name', (1, 22), 'm', ('Store',)), ('Name', (1, 27), 'p', ('Load',)), [('Name', (1, 32), 'g', ('Load',))], 0)]))]),
1121	n/a	('Module', [('Expr', (1, 0), ('DictComp', (1, 0), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'v', ('Store',)), ('Name', (1, 13), 'w', ('Store',))], ('Store',)), ('Name', (1, 18), 'x', ('Load',)), [], 0)]))]),
1122	n/a	('Module', [('Expr', (1, 0), ('SetComp', (1, 0), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 12), 'x', ('Load',)), [('Name', (1, 17), 'g', ('Load',))], 0)]))]),
1123	n/a	('Module', [('Expr', (1, 0), ('SetComp', (1, 0), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7), [('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 9), 'm', ('Store',))], ('Store',)), ('Name', (1, 14), 'x', ('Load',)), [], 0)]))]),
1124	n/a	('Module', [('AsyncFunctionDef', (1, 6), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (2, 1), ('Await', (2, 1), ('Call', (2, 7), ('Name', (2, 7), 'something', ('Load',)), [], [])))], [], None)]),
1125	n/a	('Module', [('AsyncFunctionDef', (1, 6), 'f', ('arguments', [], None, [], [], None, []), [('AsyncFor', (2, 7), ('Name', (2, 11), 'e', ('Store',)), ('Name', (2, 16), 'i', ('Load',)), [('Expr', (2, 19), ('Num', (2, 19), 1))], [('Expr', (3, 7), ('Num', (3, 7), 2))])], [], None)]),
1126	n/a	('Module', [('AsyncFunctionDef', (1, 6), 'f', ('arguments', [], None, [], [], None, []), [('AsyncWith', (2, 7), [('withitem', ('Name', (2, 12), 'a', ('Load',)), ('Name', (2, 17), 'b', ('Store',)))], [('Expr', (2, 20), ('Num', (2, 20), 1))])], [], None)]),
1127	n/a	('Module', [('Expr', (1, 0), ('Dict', (1, 0), [None, ('Num', (1, 10), 2)], [('Dict', (1, 3), [('Num', (1, 4), 1)], [('Num', (1, 6), 2)]), ('Num', (1, 12), 3)]))]),
1128	n/a	('Module', [('Expr', (1, 0), ('Set', (1, 0), [('Starred', (1, 1), ('Set', (1, 2), [('Num', (1, 3), 1), ('Num', (1, 6), 2)]), ('Load',)), ('Num', (1, 10), 3)]))]),
1129	n/a	('Module', [('AsyncFunctionDef', (1, 6), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (2, 1), ('ListComp', (2, 2), ('Name', (2, 2), 'i', ('Load',)), [('comprehension', ('Name', (2, 14), 'b', ('Store',)), ('Name', (2, 19), 'c', ('Load',)), [], 1)]))], [], None)]),
1130	n/a	]
1131	n/a	single_results = [
1132	n/a	('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
1133	n/a	]
1134	n/a	eval_results = [
1135	n/a	('Expression', ('NameConstant', (1, 0), None)),
1136	n/a	('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
1137	n/a	('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
1138	n/a	('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
1139	n/a	('Expression', ('Lambda', (1, 0), ('arguments', [], None, [], [], None, []), ('NameConstant', (1, 7), None))),
1140	n/a	('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
1141	n/a	('Expression', ('Dict', (1, 0), [], [])),
1142	n/a	('Expression', ('Set', (1, 0), [('NameConstant', (1, 1), None)])),
1143	n/a	('Expression', ('Dict', (1, 0), [('Num', (2, 6), 1)], [('Num', (4, 10), 2)])),
1144	n/a	('Expression', ('ListComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))], 0)])),
1145	n/a	('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))], 0)])),
1146	n/a	('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
1147	n/a	('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2), ('Starred', (1, 10), ('Name', (1, 11), 'd', ('Load',)), ('Load',))], [('keyword', 'c', ('Num', (1, 8), 3)), ('keyword', None, ('Name', (1, 15), 'e', ('Load',)))])),
1148	n/a	('Expression', ('Num', (1, 0), 10)),
1149	n/a	('Expression', ('Str', (1, 0), 'string')),
1150	n/a	('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),
1151	n/a	('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
1152	n/a	('Expression', ('Name', (1, 0), 'v', ('Load',))),
1153	n/a	('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
1154	n/a	('Expression', ('List', (1, 0), [], ('Load',))),
1155	n/a	('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
1156	n/a	('Expression', ('Tuple', (1, 1), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
1157	n/a	('Expression', ('Tuple', (1, 0), [], ('Load',))),
1158	n/a	('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Num', (1, 12), 1), ('Num', (1, 14), 2), None), ('Load',))], [])),
1159	n/a	]
1160	n/a	main()