/usr/share/doc/python-logilab-astng/test/unittest_builder.py is in python-logilab-astng 0.24.3-1ubuntu1.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of logilab-astng.
#
# logilab-astng is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 2.1 of the License, or (at your
# option) any later version.
#
# logilab-astng is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with logilab-astng. If not, see <http://www.gnu.org/licenses/>.
"""tests for the astng builder and rebuilder module"""
import unittest
import sys
from os.path import join, abspath, dirname
from logilab.common.testlib import TestCase, unittest_main
from pprint import pprint
from logilab.astng import builder, nodes, InferenceError, NotFoundError
from logilab.astng.nodes import Module
from logilab.astng.bases import YES, BUILTINS
from logilab.astng.manager import ASTNGManager
MANAGER = ASTNGManager()
from unittest_inference import get_name_node
import data
from data import module as test_module
DATA = join(dirname(abspath(__file__)), 'data')
class FromToLineNoTC(TestCase):
astng = builder.ASTNGBuilder().file_build(join(DATA, 'format.py'))
def test_callfunc_lineno(self):
stmts = self.astng.body
# on line 4:
# function('aeozrijz\
# earzer', hop)
discard = stmts[0]
self.assertIsInstance(discard, nodes.Discard)
self.assertEqual(discard.fromlineno, 4)
self.assertEqual(discard.tolineno, 5)
callfunc = discard.value
self.assertIsInstance(callfunc, nodes.CallFunc)
self.assertEqual(callfunc.fromlineno, 4)
self.assertEqual(callfunc.tolineno, 5)
name = callfunc.func
self.assertIsInstance(name, nodes.Name)
self.assertEqual(name.fromlineno, 4)
self.assertEqual(name.tolineno, 4)
strarg = callfunc.args[0]
self.assertIsInstance(strarg, nodes.Const)
self.assertEqual(strarg.fromlineno, 5) # no way for this one (is 4 actually)
self.assertEqual(strarg.tolineno, 5)
namearg = callfunc.args[1]
self.assertIsInstance(namearg, nodes.Name)
self.assertEqual(namearg.fromlineno, 5)
self.assertEqual(namearg.tolineno, 5)
# on line 10:
# fonction(1,
# 2,
# 3,
# 4)
discard = stmts[2]
self.assertIsInstance(discard, nodes.Discard)
self.assertEqual(discard.fromlineno, 10)
self.assertEqual(discard.tolineno, 13)
callfunc = discard.value
self.assertIsInstance(callfunc, nodes.CallFunc)
self.assertEqual(callfunc.fromlineno, 10)
self.assertEqual(callfunc.tolineno, 13)
name = callfunc.func
self.assertIsInstance(name, nodes.Name)
self.assertEqual(name.fromlineno, 10)
self.assertEqual(name.tolineno, 10)
for i, arg in enumerate(callfunc.args):
self.assertIsInstance(arg, nodes.Const)
self.assertEqual(arg.fromlineno, 10+i)
self.assertEqual(arg.tolineno, 10+i)
def test_function_lineno(self):
stmts = self.astng.body
# on line 15:
# def definition(a,
# b,
# c):
# return a + b + c
function = stmts[3]
self.assertIsInstance(function, nodes.Function)
self.assertEqual(function.fromlineno, 15)
self.assertEqual(function.tolineno, 18)
return_ = function.body[0]
self.assertIsInstance(return_, nodes.Return)
self.assertEqual(return_.fromlineno, 18)
self.assertEqual(return_.tolineno, 18)
if sys.version_info < (3, 0):
self.assertEqual(function.blockstart_tolineno, 17)
else:
self.skipTest('FIXME http://bugs.python.org/issue10445 '
'(no line number on function args)')
def test_decorated_function_lineno(self):
astng = builder.ASTNGBuilder().string_build('''
@decorator
def function(
arg):
print (arg)
''', __name__, __file__)
function = astng['function']
self.assertEqual(function.fromlineno, 3) # XXX discussable, but that's what is expected by pylint right now
self.assertEqual(function.tolineno, 5)
self.assertEqual(function.decorators.fromlineno, 2)
self.assertEqual(function.decorators.tolineno, 2)
if sys.version_info < (3, 0):
self.assertEqual(function.blockstart_tolineno, 4)
else:
self.skipTest('FIXME http://bugs.python.org/issue10445 '
'(no line number on function args)')
def test_class_lineno(self):
stmts = self.astng.body
# on line 20:
# class debile(dict,
# object):
# pass
class_ = stmts[4]
self.assertIsInstance(class_, nodes.Class)
self.assertEqual(class_.fromlineno, 20)
self.assertEqual(class_.tolineno, 22)
self.assertEqual(class_.blockstart_tolineno, 21)
pass_ = class_.body[0]
self.assertIsInstance(pass_, nodes.Pass)
self.assertEqual(pass_.fromlineno, 22)
self.assertEqual(pass_.tolineno, 22)
def test_if_lineno(self):
stmts = self.astng.body
# on line 20:
# if aaaa: pass
# else:
# aaaa,bbbb = 1,2
# aaaa,bbbb = bbbb,aaaa
if_ = stmts[5]
self.assertIsInstance(if_, nodes.If)
self.assertEqual(if_.fromlineno, 24)
self.assertEqual(if_.tolineno, 27)
self.assertEqual(if_.blockstart_tolineno, 24)
self.assertEqual(if_.orelse[0].fromlineno, 26)
self.assertEqual(if_.orelse[1].tolineno, 27)
def test_for_while_lineno(self):
for code in ('''
for a in range(4):
print (a)
break
else:
print ("bouh")
''', '''
while a:
print (a)
break
else:
print ("bouh")
''',
):
astng = builder.ASTNGBuilder().string_build(code, __name__, __file__)
stmt = astng.body[0]
self.assertEqual(stmt.fromlineno, 2)
self.assertEqual(stmt.tolineno, 6)
self.assertEqual(stmt.blockstart_tolineno, 2)
self.assertEqual(stmt.orelse[0].fromlineno, 6) # XXX
self.assertEqual(stmt.orelse[0].tolineno, 6)
def test_try_except_lineno(self):
astng = builder.ASTNGBuilder().string_build('''
try:
print (a)
except:
pass
else:
print ("bouh")
''', __name__, __file__)
try_ = astng.body[0]
self.assertEqual(try_.fromlineno, 2)
self.assertEqual(try_.tolineno, 7)
self.assertEqual(try_.blockstart_tolineno, 2)
self.assertEqual(try_.orelse[0].fromlineno, 7) # XXX
self.assertEqual(try_.orelse[0].tolineno, 7)
hdlr = try_.handlers[0]
self.assertEqual(hdlr.fromlineno, 4)
self.assertEqual(hdlr.tolineno, 5)
self.assertEqual(hdlr.blockstart_tolineno, 4)
def test_try_finally_lineno(self):
astng = builder.ASTNGBuilder().string_build('''
try:
print (a)
finally:
print ("bouh")
''', __name__, __file__)
try_ = astng.body[0]
self.assertEqual(try_.fromlineno, 2)
self.assertEqual(try_.tolineno, 5)
self.assertEqual(try_.blockstart_tolineno, 2)
self.assertEqual(try_.finalbody[0].fromlineno, 5) # XXX
self.assertEqual(try_.finalbody[0].tolineno, 5)
def test_try_finally_25_lineno(self):
astng = builder.ASTNGBuilder().string_build('''
try:
print (a)
except:
pass
finally:
print ("bouh")
''', __name__, __file__)
try_ = astng.body[0]
self.assertEqual(try_.fromlineno, 2)
self.assertEqual(try_.tolineno, 7)
self.assertEqual(try_.blockstart_tolineno, 2)
self.assertEqual(try_.finalbody[0].fromlineno, 7) # XXX
self.assertEqual(try_.finalbody[0].tolineno, 7)
def test_with_lineno(self):
astng = builder.ASTNGBuilder().string_build('''
from __future__ import with_statement
with file("/tmp/pouet") as f:
print (f)
''', __name__, __file__)
with_ = astng.body[1]
self.assertEqual(with_.fromlineno, 3)
self.assertEqual(with_.tolineno, 4)
self.assertEqual(with_.blockstart_tolineno, 3)
class BuilderTC(TestCase):
def setUp(self):
self.builder = builder.ASTNGBuilder()
def test_border_cases(self):
"""check that a file with no trailing new line is parseable"""
self.builder.file_build(join(DATA, 'noendingnewline.py'), 'data.noendingnewline')
self.assertRaises(builder.ASTNGBuildingException,
self.builder.file_build, join(DATA, 'inexistant.py'), 'whatever')
def test_inspect_build0(self):
"""test astng tree build from a living object"""
builtin_astng = MANAGER.astng_from_module_name(BUILTINS)
if sys.version_info < (3, 0):
fclass = builtin_astng['file']
self.assertIn('name', fclass)
self.assertIn('mode', fclass)
self.assertIn('read', fclass)
self.assertTrue(fclass.newstyle)
self.assertTrue(fclass.pytype(), '%s.type' % BUILTINS)
self.assertIsInstance(fclass['read'], nodes.Function)
# check builtin function has args.args == None
dclass = builtin_astng['dict']
self.assertIsNone(dclass['has_key'].args.args)
# just check type and object are there
builtin_astng.getattr('type')
objectastng = builtin_astng.getattr('object')[0]
self.assertIsInstance(objectastng.getattr('__new__')[0], nodes.Function)
# check open file alias
builtin_astng.getattr('open')
# check 'help' is there (defined dynamically by site.py)
builtin_astng.getattr('help')
# check property has __init__
pclass = builtin_astng['property']
self.assertIn('__init__', pclass)
self.assertIsInstance(builtin_astng['None'], nodes.Const)
self.assertIsInstance(builtin_astng['True'], nodes.Const)
self.assertIsInstance(builtin_astng['False'], nodes.Const)
if sys.version_info < (3, 0):
self.assertIsInstance(builtin_astng['Exception'], nodes.From)
self.assertIsInstance(builtin_astng['NotImplementedError'], nodes.From)
else:
self.assertIsInstance(builtin_astng['Exception'], nodes.Class)
self.assertIsInstance(builtin_astng['NotImplementedError'], nodes.Class)
def test_inspect_build1(self):
time_astng = MANAGER.astng_from_module_name('time')
self.assertTrue(time_astng)
self.assertEqual(time_astng['time'].args.defaults, [])
def test_inspect_build2(self):
"""test astng tree build from a living object"""
try:
from mx import DateTime
except ImportError:
self.skipTest('test skipped: mxDateTime is not available')
else:
dt_astng = self.builder.inspect_build(DateTime)
dt_astng.getattr('DateTime')
# this one is failing since DateTimeType.__module__ = 'builtins' !
#dt_astng.getattr('DateTimeType')
def test_inspect_build3(self):
self.builder.inspect_build(unittest)
def test_inspect_build_instance(self):
"""test astng tree build from a living object"""
if sys.version_info >= (3, 0):
self.skipTest('The module "exceptions" is gone in py3.x')
import exceptions
builtin_astng = self.builder.inspect_build(exceptions)
fclass = builtin_astng['OSError']
# things like OSError.strerror are now (2.5) data descriptors on the
# class instead of entries in the __dict__ of an instance
container = fclass
self.assertIn('errno', container)
self.assertIn('strerror', container)
self.assertIn('filename', container)
def test_inspect_build_type_object(self):
builtin_astng = MANAGER.astng_from_module_name(BUILTINS)
infered = list(builtin_astng.igetattr('object'))
self.assertEqual(len(infered), 1)
infered = infered[0]
self.assertEqual(infered.name, 'object')
infered.as_string() # no crash test
infered = list(builtin_astng.igetattr('type'))
self.assertEqual(len(infered), 1)
infered = infered[0]
self.assertEqual(infered.name, 'type')
infered.as_string() # no crash test
def test_package_name(self):
"""test base properties and method of a astng module"""
datap = self.builder.file_build(join(DATA, '__init__.py'), 'data')
self.assertEqual(datap.name, 'data')
self.assertEqual(datap.package, 1)
datap = self.builder.file_build(join(DATA, '__init__.py'), 'data.__init__')
self.assertEqual(datap.name, 'data')
self.assertEqual(datap.package, 1)
def test_yield_parent(self):
"""check if we added discard nodes as yield parent (w/ compiler)"""
data = """
def yiell():
yield 0
if noe:
yield more
"""
func = self.builder.string_build(data).body[0]
self.assertIsInstance(func, nodes.Function)
stmt = func.body[0]
self.assertIsInstance(stmt, nodes.Discard)
self.assertIsInstance(stmt.value, nodes.Yield)
self.assertIsInstance(func.body[1].body[0], nodes.Discard)
self.assertIsInstance(func.body[1].body[0].value, nodes.Yield)
def test_object(self):
obj_astng = self.builder.inspect_build(object)
self.assertIn('__setattr__', obj_astng)
def test_newstyle_detection(self):
data = '''
class A:
"old style"
class B(A):
"old style"
class C(object):
"new style"
class D(C):
"new style"
__metaclass__ = type
class E(A):
"old style"
class F:
"new style"
'''
mod_astng = self.builder.string_build(data, __name__, __file__)
self.assertFalse(mod_astng['A'].newstyle)
self.assertFalse(mod_astng['B'].newstyle)
self.assertTrue(mod_astng['C'].newstyle)
self.assertTrue(mod_astng['D'].newstyle)
self.assertFalse(mod_astng['E'].newstyle)
self.assertTrue(mod_astng['F'].newstyle)
def test_globals(self):
data = '''
CSTE = 1
def update_global():
global CSTE
CSTE += 1
def global_no_effect():
global CSTE2
print (CSTE)
'''
astng = self.builder.string_build(data, __name__, __file__)
self.assertEqual(len(astng.getattr('CSTE')), 2)
self.assertIsInstance(astng.getattr('CSTE')[0], nodes.AssName)
self.assertEqual(astng.getattr('CSTE')[0].fromlineno, 2)
self.assertEqual(astng.getattr('CSTE')[1].fromlineno, 6)
self.assertRaises(NotFoundError,
astng.getattr, 'CSTE2')
self.assertRaises(InferenceError,
astng['global_no_effect'].ilookup('CSTE2').next)
def test_socket_build(self):
import socket
astng = self.builder.module_build(socket)
# XXX just check the first one. Actually 3 objects are inferred (look at
# the socket module) but the last one as those attributes dynamically
# set and astng is missing this.
for fclass in astng.igetattr('socket'):
#print fclass.root().name, fclass.name, fclass.lineno
self.assertIn('connect', fclass)
self.assertIn('send', fclass)
self.assertIn('close', fclass)
break
def test_gen_expr_var_scope(self):
data = 'l = list(n for n in range(10))\n'
astng = self.builder.string_build(data, __name__, __file__)
# n unavailable outside gen expr scope
self.assertNotIn('n', astng)
# test n is inferable anyway
n = get_name_node(astng, 'n')
self.assertIsNot(n.scope(), astng)
self.assertEqual([i.__class__ for i in n.infer()],
[YES.__class__])
class FileBuildTC(TestCase):
module = builder.ASTNGBuilder().file_build(join(DATA, 'module.py'), 'data.module')
def test_module_base_props(self):
"""test base properties and method of a astng module"""
module = self.module
self.assertEqual(module.name, 'data.module')
self.assertEqual(module.doc, "test module for astng\n")
self.assertEqual(module.fromlineno, 0)
self.assertIsNone(module.parent)
self.assertEqual(module.frame(), module)
self.assertEqual(module.root(), module)
self.assertEqual(module.file, join(abspath(data.__path__[0]), 'module.py'))
self.assertEqual(module.pure_python, 1)
self.assertEqual(module.package, 0)
self.assertFalse(module.is_statement)
self.assertEqual(module.statement(), module)
self.assertEqual(module.statement(), module)
def test_module_locals(self):
"""test the 'locals' dictionary of a astng module"""
module = self.module
_locals = module.locals
self.assertIs(_locals, module.globals)
keys = sorted(_locals.keys())
should = ['MY_DICT', 'YO', 'YOUPI',
'__revision__', 'global_access','modutils', 'four_args',
'os', 'redirect', 'spawn', 'LocalsVisitor', 'ASTWalker']
should.sort()
self.assertEqual(keys, should)
def test_function_base_props(self):
"""test base properties and method of a astng function"""
module = self.module
function = module['global_access']
self.assertEqual(function.name, 'global_access')
self.assertEqual(function.doc, 'function test')
self.assertEqual(function.fromlineno, 11)
self.assertTrue(function.parent)
self.assertEqual(function.frame(), function)
self.assertEqual(function.parent.frame(), module)
self.assertEqual(function.root(), module)
self.assertEqual([n.name for n in function.args.args], ['key', 'val'])
self.assertEqual(function.type, 'function')
def test_function_locals(self):
"""test the 'locals' dictionary of a astng function"""
_locals = self.module['global_access'].locals
self.assertEqual(len(_locals), 4)
keys = sorted(_locals.keys())
self.assertEqual(keys, ['i', 'key', 'local', 'val'])
def test_class_base_props(self):
"""test base properties and method of a astng class"""
module = self.module
klass = module['YO']
self.assertEqual(klass.name, 'YO')
self.assertEqual(klass.doc, 'hehe')
self.assertEqual(klass.fromlineno, 25)
self.assertTrue(klass.parent)
self.assertEqual(klass.frame(), klass)
self.assertEqual(klass.parent.frame(), module)
self.assertEqual(klass.root(), module)
self.assertEqual(klass.basenames, [])
self.assertEqual(klass.newstyle, False)
def test_class_locals(self):
"""test the 'locals' dictionary of a astng class"""
module = self.module
klass1 = module['YO']
locals1 = klass1.locals
keys = sorted(locals1.keys())
self.assertEqual(keys, ['__init__', 'a'])
klass2 = module['YOUPI']
locals2 = klass2.locals
keys = locals2.keys()
keys.sort()
self.assertEqual(keys, ['__init__', 'class_attr', 'class_method',
'method', 'static_method'])
def test_class_instance_attrs(self):
module = self.module
klass1 = module['YO']
klass2 = module['YOUPI']
self.assertEqual(klass1.instance_attrs.keys(), ['yo'])
self.assertEqual(klass2.instance_attrs.keys(), ['member'])
def test_class_basenames(self):
module = self.module
klass1 = module['YO']
klass2 = module['YOUPI']
self.assertEqual(klass1.basenames, [])
self.assertEqual(klass2.basenames, ['YO'])
def test_method_base_props(self):
"""test base properties and method of a astng method"""
klass2 = self.module['YOUPI']
# "normal" method
method = klass2['method']
self.assertEqual(method.name, 'method')
self.assertEqual([n.name for n in method.args.args], ['self'])
self.assertEqual(method.doc, 'method test')
self.assertEqual(method.fromlineno, 47)
self.assertEqual(method.type, 'method')
# class method
method = klass2['class_method']
self.assertEqual([n.name for n in method.args.args], ['cls'])
self.assertEqual(method.type, 'classmethod')
# static method
method = klass2['static_method']
self.assertEqual(method.args.args, [])
self.assertEqual(method.type, 'staticmethod')
def test_method_locals(self):
"""test the 'locals' dictionary of a astng method"""
method = self.module['YOUPI']['method']
_locals = method.locals
keys = sorted(_locals)
if sys.version_info < (3, 0):
self.assertEqual(len(_locals), 5)
self.assertEqual(keys, ['a', 'autre', 'b', 'local', 'self'])
else:# ListComp variables are no more accessible outside
self.assertEqual(len(_locals), 3)
self.assertEqual(keys, ['autre', 'local', 'self'])
class ModuleBuildTC(FileBuildTC):
def setUp(self):
abuilder = builder.ASTNGBuilder()
self.module = abuilder.module_build(test_module)
class MoreTC(TestCase):
def setUp(self):
self.builder = builder.ASTNGBuilder()
def test_infered_build(self):
code = '''class A: pass
A.type = "class"
def A_ass_type(self):
print (self)
A.ass_type = A_ass_type
'''
astng = self.builder.string_build(code)
lclass = list(astng.igetattr('A'))
self.assertEqual(len(lclass), 1)
lclass = lclass[0]
self.assertIn('ass_type', lclass.locals)
self.assertIn('type', lclass.locals)
def test_augassign_attr(self):
astng = self.builder.string_build("""class Counter:
v = 0
def inc(self):
self.v += 1
""", __name__, __file__)
# Check self.v += 1 generate AugAssign(AssAttr(...)), not AugAssign(GetAttr(AssName...))
def test_dumb_module(self):
astng = self.builder.string_build("pouet")
def test_infered_dont_pollute(self):
code = '''
def func(a=None):
a.custom_attr = 0
def func2(a={}):
a.custom_attr = 0
'''
astng = self.builder.string_build(code)
nonetype = nodes.const_factory(None)
self.assertNotIn('custom_attr', nonetype.locals)
self.assertNotIn('custom_attr', nonetype.instance_attrs)
nonetype = nodes.const_factory({})
self.assertNotIn('custom_attr', nonetype.locals)
self.assertNotIn('custom_attr', nonetype.instance_attrs)
def test_asstuple(self):
code = 'a, b = range(2)'
astng = self.builder.string_build(code)
self.assertIn('b', astng.locals)
code = '''
def visit_if(self, node):
node.test, body = node.tests[0]
'''
astng = self.builder.string_build(code)
self.assertIn('body', astng['visit_if'].locals)
def test_build_constants(self):
'''test expected values of constants after rebuilding'''
code = '''
def func():
return None
return
return 'None'
'''
astng = self.builder.string_build(code)
none, nothing, chain = [ret.value for ret in astng.body[0].body]
self.assertIsInstance(none, nodes.Const)
self.assertIsNone(none.value)
self.assertIsNone(nothing)
self.assertIsInstance(chain, nodes.Const)
self.assertEqual(chain.value, 'None')
def test_lgc_classproperty(self):
'''test expected values of constants after rebuilding'''
code = '''
from logilab.common.decorators import classproperty
class A(object):
@classproperty
def hop(cls):
return None
'''
astng = self.builder.string_build(code)
self.assertEqual(astng['A']['hop'].type, 'classmethod')
if sys.version_info < (3, 0):
guess_encoding = builder._guess_encoding
class TestGuessEncoding(TestCase):
def testEmacs(self):
e = guess_encoding('# -*- coding: UTF-8 -*-')
self.assertEqual(e, 'UTF-8')
e = guess_encoding('# -*- coding:UTF-8 -*-')
self.assertEqual(e, 'UTF-8')
e = guess_encoding('''
### -*- coding: ISO-8859-1 -*-
''')
self.assertEqual(e, 'ISO-8859-1')
e = guess_encoding('''
### -*- coding: ISO-8859-1 -*-
''')
self.assertIsNone(e)
def testVim(self):
e = guess_encoding('# vim:fileencoding=UTF-8')
self.assertEqual(e, 'UTF-8')
e = guess_encoding('''
### vim:fileencoding=ISO-8859-1
''')
self.assertEqual(e, 'ISO-8859-1')
e = guess_encoding('''
### vim:fileencoding= ISO-8859-1
''')
self.assertIsNone(e)
def test_wrong_coding(self):
# setting "coding" varaible
e = guess_encoding("coding = UTF-8")
self.assertIsNone(e)
# setting a dictionnary entry
e = guess_encoding("coding:UTF-8")
self.assertIsNone(e)
# setting an arguement
e = guess_encoding("def do_something(a_word_with_coding=None):")
self.assertIsNone(e)
def testUTF8(self):
e = guess_encoding('\xef\xbb\xbf any UTF-8 data')
self.assertEqual(e, 'UTF-8')
e = guess_encoding(' any UTF-8 data \xef\xbb\xbf')
self.assertIsNone(e)
if __name__ == '__main__':
unittest_main()
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