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import sys
import types
import unittest
import inspect
import datetime
from test.test_support import TESTFN, run_unittest
from test import inspect_fodder as mod
from test import inspect_fodder2 as mod2
# C module for test_findsource_binary
import unicodedata
# Functions tested in this suite:
# ismodule, isclass, ismethod, isfunction, istraceback, isframe, iscode,
# isbuiltin, isroutine, isgenerator, isgeneratorfunction, getmembers,
# getdoc, getfile, getmodule, getsourcefile, getcomments, getsource,
# getclasstree, getargspec, getargvalues, formatargspec, formatargvalues,
# currentframe, stack, trace, isdatadescriptor
# NOTE: There are some additional tests relating to interaction with
# zipimport in the test_zipimport_support test module.
modfile = mod.__file__
if modfile.endswith(('c', 'o')):
modfile = modfile[:-1]
import __builtin__
try:
1/0
except:
tb = sys.exc_traceback
git = mod.StupidGit()
class IsTestBase(unittest.TestCase):
predicates = set([inspect.isbuiltin, inspect.isclass, inspect.iscode,
inspect.isframe, inspect.isfunction, inspect.ismethod,
inspect.ismodule, inspect.istraceback,
inspect.isgenerator, inspect.isgeneratorfunction])
def istest(self, predicate, exp):
obj = eval(exp)
self.failUnless(predicate(obj), '%s(%s)' % (predicate.__name__, exp))
for other in self.predicates - set([predicate]):
if predicate == inspect.isgeneratorfunction and\
other == inspect.isfunction:
continue
self.failIf(other(obj), 'not %s(%s)' % (other.__name__, exp))
def generator_function_example(self):
for i in xrange(2):
yield i
class TestPredicates(IsTestBase):
def test_sixteen(self):
count = len(filter(lambda x:x.startswith('is'), dir(inspect)))
# This test is here for remember you to update Doc/library/inspect.rst
# which claims there are 16 such functions
expected = 16
err_msg = "There are %d (not %d) is* functions" % (count, expected)
self.assertEqual(count, expected, err_msg)
def test_excluding_predicates(self):
self.istest(inspect.isbuiltin, 'sys.exit')
self.istest(inspect.isbuiltin, '[].append')
self.istest(inspect.iscode, 'mod.spam.func_code')
self.istest(inspect.isframe, 'tb.tb_frame')
self.istest(inspect.isfunction, 'mod.spam')
self.istest(inspect.ismethod, 'mod.StupidGit.abuse')
self.istest(inspect.ismethod, 'git.argue')
self.istest(inspect.ismodule, 'mod')
self.istest(inspect.istraceback, 'tb')
self.istest(inspect.isdatadescriptor, '__builtin__.file.closed')
self.istest(inspect.isdatadescriptor, '__builtin__.file.softspace')
self.istest(inspect.isgenerator, '(x for x in xrange(2))')
self.istest(inspect.isgeneratorfunction, 'generator_function_example')
if hasattr(types, 'GetSetDescriptorType'):
self.istest(inspect.isgetsetdescriptor,
'type(tb.tb_frame).f_locals')
else:
self.failIf(inspect.isgetsetdescriptor(type(tb.tb_frame).f_locals))
if hasattr(types, 'MemberDescriptorType'):
self.istest(inspect.ismemberdescriptor, 'datetime.timedelta.days')
else:
self.failIf(inspect.ismemberdescriptor(datetime.timedelta.days))
def test_isroutine(self):
self.assert_(inspect.isroutine(mod.spam))
self.assert_(inspect.isroutine([].count))
def test_isclass(self):
self.istest(inspect.isclass, 'mod.StupidGit')
self.assertTrue(inspect.isclass(list))
class newstyle(object): pass
self.assertTrue(inspect.isclass(newstyle))
class CustomGetattr(object):
def __getattr__(self, attr):
return None
self.assertFalse(inspect.isclass(CustomGetattr()))
def test_get_slot_members(self):
class C(object):
__slots__ = ("a", "b")
x = C()
x.a = 42
members = dict(inspect.getmembers(x))
self.assert_('a' in members)
self.assert_('b' not in members)
class TestInterpreterStack(IsTestBase):
def __init__(self, *args, **kwargs):
unittest.TestCase.__init__(self, *args, **kwargs)
git.abuse(7, 8, 9)
def test_abuse_done(self):
self.istest(inspect.istraceback, 'git.ex[2]')
self.istest(inspect.isframe, 'mod.fr')
def test_stack(self):
self.assert_(len(mod.st) >= 5)
self.assertEqual(mod.st[0][1:],
(modfile, 16, 'eggs', [' st = inspect.stack()\n'], 0))
self.assertEqual(mod.st[1][1:],
(modfile, 9, 'spam', [' eggs(b + d, c + f)\n'], 0))
self.assertEqual(mod.st[2][1:],
(modfile, 43, 'argue', [' spam(a, b, c)\n'], 0))
self.assertEqual(mod.st[3][1:],
(modfile, 39, 'abuse', [' self.argue(a, b, c)\n'], 0))
def test_trace(self):
self.assertEqual(len(git.tr), 3)
self.assertEqual(git.tr[0][1:], (modfile, 43, 'argue',
[' spam(a, b, c)\n'], 0))
self.assertEqual(git.tr[1][1:], (modfile, 9, 'spam',
[' eggs(b + d, c + f)\n'], 0))
self.assertEqual(git.tr[2][1:], (modfile, 18, 'eggs',
[' q = y / 0\n'], 0))
def test_frame(self):
args, varargs, varkw, locals = inspect.getargvalues(mod.fr)
self.assertEqual(args, ['x', 'y'])
self.assertEqual(varargs, None)
self.assertEqual(varkw, None)
self.assertEqual(locals, {'x': 11, 'p': 11, 'y': 14})
self.assertEqual(inspect.formatargvalues(args, varargs, varkw, locals),
'(x=11, y=14)')
def test_previous_frame(self):
args, varargs, varkw, locals = inspect.getargvalues(mod.fr.f_back)
self.assertEqual(args, ['a', 'b', 'c', 'd', ['e', ['f']]])
self.assertEqual(varargs, 'g')
self.assertEqual(varkw, 'h')
self.assertEqual(inspect.formatargvalues(args, varargs, varkw, locals),
'(a=7, b=8, c=9, d=3, (e=4, (f=5,)), *g=(), **h={})')
class GetSourceBase(unittest.TestCase):
# Subclasses must override.
fodderFile = None
def __init__(self, *args, **kwargs):
unittest.TestCase.__init__(self, *args, **kwargs)
with open(inspect.getsourcefile(self.fodderFile)) as fp:
self.source = fp.read()
def sourcerange(self, top, bottom):
lines = self.source.split("\n")
return "\n".join(lines[top-1:bottom]) + "\n"
def assertSourceEqual(self, obj, top, bottom):
self.assertEqual(inspect.getsource(obj),
self.sourcerange(top, bottom))
class TestRetrievingSourceCode(GetSourceBase):
fodderFile = mod
def test_getclasses(self):
classes = inspect.getmembers(mod, inspect.isclass)
self.assertEqual(classes,
[('FesteringGob', mod.FesteringGob),
('MalodorousPervert', mod.MalodorousPervert),
('ParrotDroppings', mod.ParrotDroppings),
('StupidGit', mod.StupidGit)])
tree = inspect.getclasstree([cls[1] for cls in classes], 1)
self.assertEqual(tree,
[(mod.ParrotDroppings, ()),
(mod.StupidGit, ()),
[(mod.MalodorousPervert, (mod.StupidGit,)),
[(mod.FesteringGob, (mod.MalodorousPervert,
mod.ParrotDroppings))
]
]
])
def test_getfunctions(self):
functions = inspect.getmembers(mod, inspect.isfunction)
self.assertEqual(functions, [('eggs', mod.eggs),
('spam', mod.spam)])
def test_getdoc(self):
self.assertEqual(inspect.getdoc(mod), 'A module docstring.')
self.assertEqual(inspect.getdoc(mod.StupidGit),
'A longer,\n\nindented\n\ndocstring.')
self.assertEqual(inspect.getdoc(git.abuse),
'Another\n\ndocstring\n\ncontaining\n\ntabs')
def test_cleandoc(self):
self.assertEqual(inspect.cleandoc('An\n indented\n docstring.'),
'An\nindented\ndocstring.')
def test_getcomments(self):
self.assertEqual(inspect.getcomments(mod), '# line 1\n')
self.assertEqual(inspect.getcomments(mod.StupidGit), '# line 20\n')
def test_getmodule(self):
# Check actual module
self.assertEqual(inspect.getmodule(mod), mod)
# Check class (uses __module__ attribute)
self.assertEqual(inspect.getmodule(mod.StupidGit), mod)
# Check a method (no __module__ attribute, falls back to filename)
self.assertEqual(inspect.getmodule(mod.StupidGit.abuse), mod)
# Do it again (check the caching isn't broken)
self.assertEqual(inspect.getmodule(mod.StupidGit.abuse), mod)
# Check a builtin
self.assertEqual(inspect.getmodule(str), sys.modules["__builtin__"])
# Check filename override
self.assertEqual(inspect.getmodule(None, modfile), mod)
def test_getsource(self):
self.assertSourceEqual(git.abuse, 29, 39)
self.assertSourceEqual(mod.StupidGit, 21, 46)
def test_getsourcefile(self):
self.assertEqual(inspect.getsourcefile(mod.spam), modfile)
self.assertEqual(inspect.getsourcefile(git.abuse), modfile)
def test_getfile(self):
self.assertEqual(inspect.getfile(mod.StupidGit), mod.__file__)
def test_getmodule_recursion(self):
from types import ModuleType
name = '__inspect_dummy'
m = sys.modules[name] = ModuleType(name)
m.__file__ = "<string>" # hopefully not a real filename...
m.__loader__ = "dummy" # pretend the filename is understood by a loader
exec "def x(): pass" in m.__dict__
self.assertEqual(inspect.getsourcefile(m.x.func_code), '<string>')
del sys.modules[name]
inspect.getmodule(compile('a=10','','single'))
class TestDecorators(GetSourceBase):
fodderFile = mod2
def test_wrapped_decorator(self):
self.assertSourceEqual(mod2.wrapped, 14, 17)
def test_replacing_decorator(self):
self.assertSourceEqual(mod2.gone, 9, 10)
class TestOneliners(GetSourceBase):
fodderFile = mod2
def test_oneline_lambda(self):
# Test inspect.getsource with a one-line lambda function.
self.assertSourceEqual(mod2.oll, 25, 25)
def test_threeline_lambda(self):
# Test inspect.getsource with a three-line lambda function,
# where the second and third lines are _not_ indented.
self.assertSourceEqual(mod2.tll, 28, 30)
def test_twoline_indented_lambda(self):
# Test inspect.getsource with a two-line lambda function,
# where the second line _is_ indented.
self.assertSourceEqual(mod2.tlli, 33, 34)
def test_onelinefunc(self):
# Test inspect.getsource with a regular one-line function.
self.assertSourceEqual(mod2.onelinefunc, 37, 37)
def test_manyargs(self):
# Test inspect.getsource with a regular function where
# the arguments are on two lines and _not_ indented and
# the body on the second line with the last arguments.
self.assertSourceEqual(mod2.manyargs, 40, 41)
def test_twolinefunc(self):
# Test inspect.getsource with a regular function where
# the body is on two lines, following the argument list and
# continued on the next line by a \\.
self.assertSourceEqual(mod2.twolinefunc, 44, 45)
def test_lambda_in_list(self):
# Test inspect.getsource with a one-line lambda function
# defined in a list, indented.
self.assertSourceEqual(mod2.a[1], 49, 49)
def test_anonymous(self):
# Test inspect.getsource with a lambda function defined
# as argument to another function.
self.assertSourceEqual(mod2.anonymous, 55, 55)
class TestBuggyCases(GetSourceBase):
fodderFile = mod2
def test_with_comment(self):
self.assertSourceEqual(mod2.with_comment, 58, 59)
def test_multiline_sig(self):
self.assertSourceEqual(mod2.multiline_sig[0], 63, 64)
def test_nested_class(self):
self.assertSourceEqual(mod2.func69().func71, 71, 72)
def test_one_liner_followed_by_non_name(self):
self.assertSourceEqual(mod2.func77, 77, 77)
def test_one_liner_dedent_non_name(self):
self.assertSourceEqual(mod2.cls82.func83, 83, 83)
def test_with_comment_instead_of_docstring(self):
self.assertSourceEqual(mod2.func88, 88, 90)
def test_method_in_dynamic_class(self):
self.assertSourceEqual(mod2.method_in_dynamic_class, 95, 97)
@unittest.skipIf(
not hasattr(unicodedata, '__file__') or
unicodedata.__file__[-4:] in (".pyc", ".pyo"),
"unicodedata is not an external binary module")
def test_findsource_binary(self):
self.assertRaises(IOError, inspect.getsource, unicodedata)
self.assertRaises(IOError, inspect.findsource, unicodedata)
# Helper for testing classify_class_attrs.
def attrs_wo_objs(cls):
return [t[:3] for t in inspect.classify_class_attrs(cls)]
class TestClassesAndFunctions(unittest.TestCase):
def test_classic_mro(self):
# Test classic-class method resolution order.
class A: pass
class B(A): pass
class C(A): pass
class D(B, C): pass
expected = (D, B, A, C)
got = inspect.getmro(D)
self.assertEqual(expected, got)
def test_newstyle_mro(self):
# The same w/ new-class MRO.
class A(object): pass
class B(A): pass
class C(A): pass
class D(B, C): pass
expected = (D, B, C, A, object)
got = inspect.getmro(D)
self.assertEqual(expected, got)
def assertArgSpecEquals(self, routine, args_e, varargs_e = None,
varkw_e = None, defaults_e = None,
formatted = None):
args, varargs, varkw, defaults = inspect.getargspec(routine)
self.assertEqual(args, args_e)
self.assertEqual(varargs, varargs_e)
self.assertEqual(varkw, varkw_e)
self.assertEqual(defaults, defaults_e)
if formatted is not None:
self.assertEqual(inspect.formatargspec(args, varargs, varkw, defaults),
formatted)
def test_getargspec(self):
self.assertArgSpecEquals(mod.eggs, ['x', 'y'], formatted = '(x, y)')
self.assertArgSpecEquals(mod.spam,
['a', 'b', 'c', 'd', ['e', ['f']]],
'g', 'h', (3, (4, (5,))),
'(a, b, c, d=3, (e, (f,))=(4, (5,)), *g, **h)')
def test_getargspec_method(self):
class A(object):
def m(self):
pass
self.assertArgSpecEquals(A.m, ['self'])
def test_getargspec_sublistofone(self):
def sublistOfOne((foo,)): return 1
self.assertArgSpecEquals(sublistOfOne, [['foo']])
def fakeSublistOfOne((foo)): return 1
self.assertArgSpecEquals(fakeSublistOfOne, ['foo'])
def test_classify_oldstyle(self):
class A:
def s(): pass
s = staticmethod(s)
def c(cls): pass
c = classmethod(c)
def getp(self): pass
p = property(getp)
def m(self): pass
def m1(self): pass
datablob = '1'
attrs = attrs_wo_objs(A)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'class method', A) in attrs, 'missing class method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', A) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class B(A):
def m(self): pass
attrs = attrs_wo_objs(B)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'class method', A) in attrs, 'missing class method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', B) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class C(A):
def m(self): pass
def c(self): pass
attrs = attrs_wo_objs(C)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'method', C) in attrs, 'missing plain method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', C) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class D(B, C):
def m1(self): pass
attrs = attrs_wo_objs(D)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'class method', A) in attrs, 'missing class method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', B) in attrs, 'missing plain method')
self.assert_(('m1', 'method', D) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
# Repeat all that, but w/ new-style classes.
def test_classify_newstyle(self):
class A(object):
def s(): pass
s = staticmethod(s)
def c(cls): pass
c = classmethod(c)
def getp(self): pass
p = property(getp)
def m(self): pass
def m1(self): pass
datablob = '1'
attrs = attrs_wo_objs(A)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'class method', A) in attrs, 'missing class method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', A) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class B(A):
def m(self): pass
attrs = attrs_wo_objs(B)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'class method', A) in attrs, 'missing class method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', B) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class C(A):
def m(self): pass
def c(self): pass
attrs = attrs_wo_objs(C)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'method', C) in attrs, 'missing plain method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', C) in attrs, 'missing plain method')
self.assert_(('m1', 'method', A) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
class D(B, C):
def m1(self): pass
attrs = attrs_wo_objs(D)
self.assert_(('s', 'static method', A) in attrs, 'missing static method')
self.assert_(('c', 'method', C) in attrs, 'missing plain method')
self.assert_(('p', 'property', A) in attrs, 'missing property')
self.assert_(('m', 'method', B) in attrs, 'missing plain method')
self.assert_(('m1', 'method', D) in attrs, 'missing plain method')
self.assert_(('datablob', 'data', A) in attrs, 'missing data')
def test_main():
run_unittest(TestDecorators, TestRetrievingSourceCode, TestOneliners,
TestBuggyCases,
TestInterpreterStack, TestClassesAndFunctions, TestPredicates)
if __name__ == "__main__":
test_main()