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"""
Test harness for the venv module.
Copyright (C) 2011-2012 Vinay Sajip.
Licensed to the PSF under a contributor agreement.
"""
import os
import os.path
import shutil
import subprocess
import sys
import tempfile
from test.support import (captured_stdout, captured_stderr, run_unittest,
can_symlink)
import unittest
import venv
class BaseTest(unittest.TestCase):
"""Base class for venv tests."""
def setUp(self):
self.env_dir = os.path.realpath(tempfile.mkdtemp())
if os.name == 'nt':
self.bindir = 'Scripts'
self.lib = ('Lib',)
self.include = 'Include'
else:
self.bindir = 'bin'
self.lib = ('lib', 'python%s' % sys.version[:3])
self.include = 'include'
if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in os.environ:
executable = os.environ['__PYVENV_LAUNCHER__']
else:
executable = sys.executable
self.exe = os.path.split(executable)[-1]
def tearDown(self):
shutil.rmtree(self.env_dir)
def run_with_capture(self, func, *args, **kwargs):
with captured_stdout() as output:
with captured_stderr() as error:
func(*args, **kwargs)
return output.getvalue(), error.getvalue()
def get_env_file(self, *args):
return os.path.join(self.env_dir, *args)
def get_text_file_contents(self, *args):
with open(self.get_env_file(*args), 'r') as f:
result = f.read()
return result
class BasicTest(BaseTest):
"""Test venv module functionality."""
def isdir(self, *args):
fn = self.get_env_file(*args)
self.assertTrue(os.path.isdir(fn))
def test_defaults(self):
"""
Test the create function with default arguments.
"""
shutil.rmtree(self.env_dir)
self.run_with_capture(venv.create, self.env_dir)
self.isdir(self.bindir)
self.isdir(self.include)
self.isdir(*self.lib)
data = self.get_text_file_contents('pyvenv.cfg')
if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
in os.environ):
executable = os.environ['__PYVENV_LAUNCHER__']
else:
executable = sys.executable
path = os.path.dirname(executable)
self.assertIn('home = %s' % path, data)
fn = self.get_env_file(self.bindir, self.exe)
if not os.path.exists(fn): # diagnostics for Windows buildbot failures
bd = self.get_env_file(self.bindir)
print('Contents of %r:' % bd)
print(' %r' % os.listdir(bd))
self.assertTrue(os.path.exists(fn), 'File %r should exist.' % fn)
@unittest.skipIf(sys.prefix != sys.base_prefix, 'Test not appropriate '
'in a venv')
def test_prefixes(self):
"""
Test that the prefix values are as expected.
"""
#check our prefixes
self.assertEqual(sys.base_prefix, sys.prefix)
self.assertEqual(sys.base_exec_prefix, sys.exec_prefix)
# check a venv's prefixes
shutil.rmtree(self.env_dir)
self.run_with_capture(venv.create, self.env_dir)
envpy = os.path.join(self.env_dir, self.bindir, self.exe)
cmd = [envpy, '-c', None]
for prefix, expected in (
('prefix', self.env_dir),
('prefix', self.env_dir),
('base_prefix', sys.prefix),
('base_exec_prefix', sys.exec_prefix)):
cmd[2] = 'import sys; print(sys.%s)' % prefix
p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate()
self.assertEqual(out.strip(), expected.encode())
if sys.platform == 'win32':
ENV_SUBDIRS = (
('Scripts',),
('Include',),
('Lib',),
('Lib', 'site-packages'),
)
else:
ENV_SUBDIRS = (
('bin',),
('include',),
('lib',),
('lib', 'python%d.%d' % sys.version_info[:2]),
('lib', 'python%d.%d' % sys.version_info[:2], 'site-packages'),
)
def create_contents(self, paths, filename):
"""
Create some files in the environment which are unrelated
to the virtual environment.
"""
for subdirs in paths:
d = os.path.join(self.env_dir, *subdirs)
os.mkdir(d)
fn = os.path.join(d, filename)
with open(fn, 'wb') as f:
f.write(b'Still here?')
def test_overwrite_existing(self):
"""
Test creating environment in an existing directory.
"""
self.create_contents(self.ENV_SUBDIRS, 'foo')
venv.create(self.env_dir)
for subdirs in self.ENV_SUBDIRS:
fn = os.path.join(self.env_dir, *(subdirs + ('foo',)))
self.assertTrue(os.path.exists(fn))
with open(fn, 'rb') as f:
self.assertEqual(f.read(), b'Still here?')
builder = venv.EnvBuilder(clear=True)
builder.create(self.env_dir)
for subdirs in self.ENV_SUBDIRS:
fn = os.path.join(self.env_dir, *(subdirs + ('foo',)))
self.assertFalse(os.path.exists(fn))
def clear_directory(self, path):
for fn in os.listdir(path):
fn = os.path.join(path, fn)
if os.path.islink(fn) or os.path.isfile(fn):
os.remove(fn)
elif os.path.isdir(fn):
shutil.rmtree(fn)
def test_unoverwritable_fails(self):
#create a file clashing with directories in the env dir
for paths in self.ENV_SUBDIRS[:3]:
fn = os.path.join(self.env_dir, *paths)
with open(fn, 'wb') as f:
f.write(b'')
self.assertRaises((ValueError, OSError), venv.create, self.env_dir)
self.clear_directory(self.env_dir)
def test_upgrade(self):
"""
Test upgrading an existing environment directory.
"""
builder = venv.EnvBuilder(upgrade=True)
self.run_with_capture(builder.create, self.env_dir)
self.isdir(self.bindir)
self.isdir(self.include)
self.isdir(*self.lib)
fn = self.get_env_file(self.bindir, self.exe)
if not os.path.exists(fn): # diagnostics for Windows buildbot failures
bd = self.get_env_file(self.bindir)
print('Contents of %r:' % bd)
print(' %r' % os.listdir(bd))
self.assertTrue(os.path.exists(fn), 'File %r should exist.' % fn)
def test_isolation(self):
"""
Test isolation from system site-packages
"""
for ssp, s in ((True, 'true'), (False, 'false')):
builder = venv.EnvBuilder(clear=True, system_site_packages=ssp)
builder.create(self.env_dir)
data = self.get_text_file_contents('pyvenv.cfg')
self.assertIn('include-system-site-packages = %s\n' % s, data)
@unittest.skipUnless(can_symlink(), 'Needs symlinks')
def test_symlinking(self):
"""
Test symlinking works as expected
"""
for usl in (False, True):
builder = venv.EnvBuilder(clear=True, symlinks=usl)
builder.create(self.env_dir)
fn = self.get_env_file(self.bindir, self.exe)
# Don't test when False, because e.g. 'python' is always
# symlinked to 'python3.3' in the env, even when symlinking in
# general isn't wanted.
if usl:
self.assertTrue(os.path.islink(fn))
# If a venv is created from a source build and that venv is used to
# run the test, the pyvenv.cfg in the venv created in the test will
# point to the venv being used to run the test, and we lose the link
# to the source build - so Python can't initialise properly.
@unittest.skipIf(sys.prefix != sys.base_prefix, 'Test not appropriate '
'in a venv')
def test_executable(self):
"""
Test that the sys.executable value is as expected.
"""
shutil.rmtree(self.env_dir)
self.run_with_capture(venv.create, self.env_dir)
envpy = os.path.join(os.path.realpath(self.env_dir), self.bindir, self.exe)
cmd = [envpy, '-c', 'import sys; print(sys.executable)']
p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate()
self.assertEqual(out.strip(), envpy.encode())
@unittest.skipUnless(can_symlink(), 'Needs symlinks')
def test_executable_symlinks(self):
"""
Test that the sys.executable value is as expected.
"""
shutil.rmtree(self.env_dir)
builder = venv.EnvBuilder(clear=True, symlinks=True)
builder.create(self.env_dir)
envpy = os.path.join(os.path.realpath(self.env_dir), self.bindir, self.exe)
cmd = [envpy, '-c', 'import sys; print(sys.executable)']
p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate()
self.assertEqual(out.strip(), envpy.encode())
def test_main():
run_unittest(BasicTest)
if __name__ == "__main__":
test_main()
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