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python-future/tests/test_future/test_pasteurize.py at develop · CodeShane/python-future · GitHub
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# -*- coding: utf-8 -*-
"""
This module contains snippets of Python 3 code (invalid Python 2) and
tests for whether they can be passed to ``pasteurize`` and
immediately run under both Python 2 and Python 3.
"""
from
__future__
import
print_function
,
absolute_import
import
pprint
from
subprocess
import
Popen
,
PIPE
import
tempfile
import
os
from
future
.
tests
.
base
import
CodeHandler
,
unittest
,
skip26
class
TestPasteurize
(
CodeHandler
):
"""
After running ``pasteurize``, these Python 3 code snippets should run
on both Py3 and Py2.
"""
def
setUp
(
self
):
# For tests that need a text file:
_
,
self
.
textfilename
=
tempfile
.
mkstemp
(
text
=
True
)
super
(
TestPasteurize
,
self
).
setUp
()
def
tearDown
(
self
):
os
.
unlink
(
self
.
textfilename
)
@
skip26
# Python 2.6's lib2to3 causes the "from builtins import
# range" line to be stuck at the bottom of the module!
def
test_range_slice
(
self
):
"""
After running ``pasteurize``, this Python 3 code should run
quickly on both Py3 and Py2 without a MemoryError
"""
code
=
'''
for i in range(10**8)[:10]:
pass
'''
self
.
unchanged
(
code
,
from3
=
True
)
def
test_print
(
self
):
"""
This Python 3-only code is a SyntaxError on Py2 without the
print_function import from __future__.
"""
code
=
'''
import sys
print('Hello', file=sys.stderr)
'''
self
.
unchanged
(
code
,
from3
=
True
)
def
test_division
(
self
):
"""
True division should not be screwed up by conversion from 3 to both
"""
code
=
'''
x = 3 / 2
assert x == 1.5
'''
self
.
unchanged
(
code
,
from3
=
True
)
# TODO: write / fix the raise_ fixer so that it uses the raise_ function
@
unittest
.
expectedFailure
def
test_exception_indentation
(
self
):
"""
As of v0.11.2, pasteurize broke the indentation of ``raise`` statements
using with_traceback. Test for this.
"""
before
=
'''
import sys
if True:
try:
'string' + 1
except TypeError:
ty, va, tb = sys.exc_info()
raise TypeError("can't do that!").with_traceback(tb)
'''
after
=
'''
import sys
from future.utils import raise_with_traceback
if True:
try:
'string' + 1
except TypeError:
ty, va, tb = sys.exc_info()
raise_with_traceback(TypeError("can't do that!"), tb)
'''
self
.
convert_check
(
before
,
after
,
from3
=
True
)
# TODO: fix and test this test
@
unittest
.
expectedFailure
def
test_urllib_request
(
self
):
"""
Example Python 3 code using the new urllib.request module.
Does the ``pasteurize`` script handle this?
"""
before
=
"""
import pprint
import urllib.request
URL = 'http://pypi.python.org/pypi/{}/json'
package = 'future'
r = urllib.request.urlopen(URL.format(package))
pprint.pprint(r.read())
"""
after
=
"""
import pprint
import future.standard_library.urllib.request as urllib_request
URL = 'http://pypi.python.org/pypi/{}/json'
package = 'future'
r = urllib_request.urlopen(URL.format(package))
pprint.pprint(r.read())
"""
self
.
convert_check
(
before
,
after
,
from3
=
True
)
def
test_urllib_refactor2
(
self
):
before
=
"""
import urllib.request, urllib.parse
f = urllib.request.urlopen(url, timeout=15)
filename = urllib.parse.urlparse(url)[2].split('/')[-1]
"""
after
=
"""
from future.standard_library.urllib import request as urllib_request
from future.standard_library.urllib import parse as urllib_parse
f = urllib_request.urlopen(url, timeout=15)
filename = urllib_parse.urlparse(url)[2].split('/')[-1]
"""
def
test_correct_exit_status
(
self
):
"""
Issue #119: futurize and pasteurize were not exiting with the correct
status code. This is because the status code returned from
libfuturize.main.main() etc. was a ``newint``, which sys.exit() always
translates into 1!
"""
from
libpasteurize
.
main
import
main
# Try pasteurizing this test script:
retcode
=
main
([
self
.
textfilename
])
self
.
assertTrue
(
isinstance
(
retcode
,
int
))
# i.e. Py2 builtin int
class
TestFuturizeAnnotations
(
CodeHandler
):
@
unittest
.
expectedFailure
def
test_return_annotations_alone
(
self
):
before
=
"def foo() -> 'bar': pass"
after
=
"""
def foo(): pass
foo.__annotations__ = {'return': 'bar'}
"""
self
.
convert_check
(
before
,
after
,
from3
=
True
)
b
=
"""
def foo() -> "bar":
print "baz"
print "what's next, again?"
"""
a
=
"""
def foo():
print "baz"
print "what's next, again?"
"""
self
.
convert_check
(
b
,
a
,
from3
=
True
)
@
unittest
.
expectedFailure
def
test_single_param_annotations
(
self
):
b
=
"def foo(bar:'baz'): pass"
a
=
"""
def foo(bar): pass
foo.__annotations__ = {'bar': 'baz'}
"""
self
.
convert_check
(
b
,
a
,
from3
=
True
)
b
=
"""
def foo(bar:"baz"="spam"):
print("what's next, again?")
print("whatever.")
"""
a
=
"""
def foo(bar="spam"):
print("what's next, again?")
print("whatever.")
foo.__annotations__ = {'bar': 'baz'}
"""
self
.
convert_check
(
b
,
a
,
from3
=
True
)
def
test_multiple_param_annotations
(
self
):
b
=
"def foo(bar:'spam'=False, baz:'eggs'=True, ham:False='spaghetti'): pass"
a
=
"def foo(bar=False, baz=True, ham='spaghetti'): pass"
self
.
convert_check
(
b
,
a
,
from3
=
True
)
b
=
"""
def foo(bar:"spam"=False, baz:"eggs"=True, ham:False="spam"):
print("this is filler, just doing a suite")
print("suites require multiple lines.")
"""
a
=
"""
def foo(bar=False, baz=True, ham="spam"):
print("this is filler, just doing a suite")
print("suites require multiple lines.")
"""
self
.
convert_check
(
b
,
a
,
from3
=
True
)
def
test_mixed_annotations
(
self
):
b
=
"def foo(bar=False, baz:'eggs'=True, ham:False='spaghetti') -> 'zombies': pass"
a
=
"def foo(bar=False, baz=True, ham='spaghetti'): pass"
self
.
convert_check
(
b
,
a
,
from3
=
True
)
b
=
"""
def foo(bar:"spam"=False, baz=True, ham:False="spam") -> 'air':
print("this is filler, just doing a suite")
print("suites require multiple lines.")
"""
a
=
"""
def foo(bar=False, baz=True, ham="spam"):
print("this is filler, just doing a suite")
print("suites require multiple lines.")
"""
self
.
convert_check
(
b
,
a
,
from3
=
True
)
b
=
"def foo(bar) -> 'brains': pass"
a
=
"def foo(bar): pass"
self
.
convert_check
(
b
,
a
,
from3
=
True
)
def
test_functions_unchanged
(
self
):
s
=
"def foo(): pass"
self
.
unchanged
(
s
,
from3
=
True
)
s
=
"""
def foo():
pass
pass
"""
self
.
unchanged
(
s
,
from3
=
True
)
s
=
"""
def foo(bar='baz'):
pass
pass
"""
self
.
unchanged
(
s
,
from3
=
True
)
if
__name__
==
'__main__'
:
unittest
.
main
()
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