/usr/lib/python2.7/test/test_code.py is in libpython2.7-testsuite 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | """This module includes tests of the code object representation.
>>> def f(x):
... def g(y):
... return x + y
... return g
...
>>> dump(f.func_code)
name: f
argcount: 1
names: ()
varnames: ('x', 'g')
cellvars: ('x',)
freevars: ()
nlocals: 2
flags: 3
consts: ('None', '<code object g>')
>>> dump(f(4).func_code)
name: g
argcount: 1
names: ()
varnames: ('y',)
cellvars: ()
freevars: ('x',)
nlocals: 1
flags: 19
consts: ('None',)
>>> def h(x, y):
... a = x + y
... b = x - y
... c = a * b
... return c
...
>>> dump(h.func_code)
name: h
argcount: 2
names: ()
varnames: ('x', 'y', 'a', 'b', 'c')
cellvars: ()
freevars: ()
nlocals: 5
flags: 67
consts: ('None',)
>>> def attrs(obj):
... print obj.attr1
... print obj.attr2
... print obj.attr3
>>> dump(attrs.func_code)
name: attrs
argcount: 1
names: ('attr1', 'attr2', 'attr3')
varnames: ('obj',)
cellvars: ()
freevars: ()
nlocals: 1
flags: 67
consts: ('None',)
>>> def optimize_away():
... 'doc string'
... 'not a docstring'
... 53
... 53L
>>> dump(optimize_away.func_code)
name: optimize_away
argcount: 0
names: ()
varnames: ()
cellvars: ()
freevars: ()
nlocals: 0
flags: 67
consts: ("'doc string'", 'None')
"""
import unittest
import weakref
from test.test_support import run_doctest, run_unittest, cpython_only
def consts(t):
"""Yield a doctest-safe sequence of object reprs."""
for elt in t:
r = repr(elt)
if r.startswith("<code object"):
yield "<code object %s>" % elt.co_name
else:
yield r
def dump(co):
"""Print out a text representation of a code object."""
for attr in ["name", "argcount", "names", "varnames", "cellvars",
"freevars", "nlocals", "flags"]:
print "%s: %s" % (attr, getattr(co, "co_" + attr))
print "consts:", tuple(consts(co.co_consts))
class CodeTest(unittest.TestCase):
@cpython_only
def test_newempty(self):
import _testcapi
co = _testcapi.code_newempty("filename", "funcname", 15)
self.assertEqual(co.co_filename, "filename")
self.assertEqual(co.co_name, "funcname")
self.assertEqual(co.co_firstlineno, 15)
def isinterned(s):
return s is intern(('_' + s + '_')[1:-1])
class CodeConstsTest(unittest.TestCase):
def find_const(self, consts, value):
for v in consts:
if v == value:
return v
self.assertIn(value, consts) # raises an exception
self.fail('Should never be reached')
def assertIsInterned(self, s):
if not isinterned(s):
self.fail('String %r is not interned' % (s,))
def assertIsNotInterned(self, s):
if isinterned(s):
self.fail('String %r is interned' % (s,))
@cpython_only
def test_interned_string(self):
co = compile('res = "str_value"', '?', 'exec')
v = self.find_const(co.co_consts, 'str_value')
self.assertIsInterned(v)
@cpython_only
def test_interned_string_in_tuple(self):
co = compile('res = ("str_value",)', '?', 'exec')
v = self.find_const(co.co_consts, ('str_value',))
self.assertIsInterned(v[0])
@cpython_only
def test_interned_string_default(self):
def f(a='str_value'):
return a
self.assertIsInterned(f())
@cpython_only
def test_interned_string_with_null(self):
co = compile(r'res = "str\0value!"', '?', 'exec')
v = self.find_const(co.co_consts, 'str\0value!')
self.assertIsNotInterned(v)
class CodeWeakRefTest(unittest.TestCase):
def test_basic(self):
# Create a code object in a clean environment so that we know we have
# the only reference to it left.
namespace = {}
exec "def f(): pass" in globals(), namespace
f = namespace["f"]
del namespace
self.called = False
def callback(code):
self.called = True
# f is now the last reference to the function, and through it, the code
# object. While we hold it, check that we can create a weakref and
# deref it. Then delete it, and check that the callback gets called and
# the reference dies.
coderef = weakref.ref(f.__code__, callback)
self.assertTrue(bool(coderef()))
del f
self.assertFalse(bool(coderef()))
self.assertTrue(self.called)
def test_main(verbose=None):
from test import test_code
run_doctest(test_code, verbose)
run_unittest(CodeTest, CodeConstsTest, CodeWeakRefTest)
if __name__ == "__main__":
test_main()
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