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import os.path

import sys

from unittest import mock

import pytest

import pre_commit.constants as C

from pre_commit.envcontext import envcontext

from pre_commit.languages import python

from pre_commit.prefix import Prefix

from pre_commit.util import make_executable

def test_read_pyvenv_cfg(tmpdir):

pyvenv_cfg = tmpdir.join('pyvenv.cfg')

pyvenv_cfg.write(

'# I am a comment\n'

'\n'

'foo = bar\n'

'version-info=123\n',

)

expected = {'foo': 'bar', 'version-info': '123'}

assert python._read_pyvenv_cfg(pyvenv_cfg) == expected

def test_norm_version_expanduser():

home = os.path.expanduser('~')

if os.name == 'nt': # pragma: nt cover

path = r'~\python343'

expected_path = fr'{home}\python343'

else: # pragma: nt no cover

path = '~/.pyenv/versions/3.4.3/bin/python'

expected_path = f'{home}/.pyenv/versions/3.4.3/bin/python'

result = python.norm_version(path)

assert result == expected_path

def test_norm_version_of_default_is_sys_executable():

assert python.norm_version('default') == os.path.realpath(sys.executable)

@pytest.mark.parametrize('v', ('python3.6', 'python3', 'python'))

def test_sys_executable_matches(v):

with mock.patch.object(sys, 'version_info', (3, 6, 7)):

assert python._sys_executable_matches(v)

@pytest.mark.parametrize('v', ('notpython', 'python3.x'))

def test_sys_executable_matches_does_not_match(v):

with mock.patch.object(sys, 'version_info', (3, 6, 7)):

assert not python._sys_executable_matches(v)

@pytest.mark.parametrize(

('exe', 'realpath', 'expected'), (

('/usr/bin/python3', '/usr/bin/python3.7', 'python3'),

('/usr/bin/python', '/usr/bin/python3.7', 'python3.7'),

('/usr/bin/python', '/usr/bin/python', None),

('/usr/bin/python3.6m', '/usr/bin/python3.6m', 'python3.6m'),

('v/bin/python', 'v/bin/pypy', 'pypy'),

)

def test_find_by_sys_executable(exe, realpath, expected):

with mock.patch.object(sys, 'executable', exe):

with mock.patch.object(os.path, 'realpath', return_value=realpath):

with mock.patch.object(python, 'find_executable', lambda x: x):

assert python._find_by_sys_executable() == expected

@pytest.fixture

def python_dir(tmpdir):

with tmpdir.as_cwd():

prefix = tmpdir.join('prefix').ensure_dir()

prefix.join('setup.py').write('import setuptools; setuptools.setup()')

prefix = Prefix(str(prefix))

yield prefix, tmpdir

def test_healthy_default_creator(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

# should be healthy right after creation

assert python.healthy(prefix, C.DEFAULT) is True

# even if a `types.py` file exists, should still be healthy

tmpdir.join('types.py').ensure()

assert python.healthy(prefix, C.DEFAULT) is True

def test_healthy_venv_creator(python_dir):

# venv creator produces slightly different pyvenv.cfg

prefix, tmpdir = python_dir

with envcontext((('VIRTUALENV_CREATOR', 'venv'),)):

python.install_environment(prefix, C.DEFAULT, ())

assert python.healthy(prefix, C.DEFAULT) is True

def test_unhealthy_python_goes_missing(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

exe_name = 'python' if sys.platform != 'win32' else 'python.exe'

py_exe = prefix.path(python.bin_dir('py_env-default'), exe_name)

os.remove(py_exe)

assert python.healthy(prefix, C.DEFAULT) is False

def test_unhealthy_with_version_change(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

with open(prefix.path('py_env-default/pyvenv.cfg'), 'w') as f:

f.write('version_info = 1.2.3\n')

assert python.healthy(prefix, C.DEFAULT) is False

def test_unhealthy_system_version_changes(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

with open(prefix.path('py_env-default/pyvenv.cfg'), 'a') as f:

f.write('base-executable = /does/not/exist\n')

assert python.healthy(prefix, C.DEFAULT) is False

def test_unhealthy_old_virtualenv(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

# simulate "old" virtualenv by deleting this file

os.remove(prefix.path('py_env-default/pyvenv.cfg'))

assert python.healthy(prefix, C.DEFAULT) is False

def test_unhealthy_then_replaced(python_dir):

prefix, tmpdir = python_dir

python.install_environment(prefix, C.DEFAULT, ())

# simulate an exe which returns an old version

exe_name = 'python.exe' if sys.platform == 'win32' else 'python'

py_exe = prefix.path(python.bin_dir('py_env-default'), exe_name)

os.rename(py_exe, f'{py_exe}.tmp')

with open(py_exe, 'w') as f:

f.write('#!/usr/bin/env bash\necho 1.2.3\n')

make_executable(py_exe)

# should be unhealthy due to version mismatch

assert python.healthy(prefix, C.DEFAULT) is False

# now put the exe back and it should be healthy again

os.replace(f'{py_exe}.tmp', py_exe)

assert python.healthy(prefix, C.DEFAULT) is True

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