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