virtualenv/tests/unit/discovery/test_discovery.py
Bernát Gábor aac61dfbaf
Fallback functionality for interpreter discovery (#1995)
Signed-off-by: Bernát Gábor <bgabor8@bloomberg.net>
2020-10-25 00:01:36 +01:00

77 lines
2.8 KiB
Python

from __future__ import absolute_import, unicode_literals
import logging
import os
import sys
from argparse import Namespace
from uuid import uuid4
import pytest
from virtualenv.discovery.builtin import Builtin, get_interpreter
from virtualenv.discovery.py_info import PythonInfo
from virtualenv.info import fs_supports_symlink
from virtualenv.util.path import Path
from virtualenv.util.six import ensure_text
@pytest.mark.skipif(not fs_supports_symlink(), reason="symlink not supported")
@pytest.mark.parametrize("case", ["mixed", "lower", "upper"])
def test_discovery_via_path(monkeypatch, case, tmp_path, caplog, session_app_data):
caplog.set_level(logging.DEBUG)
current = PythonInfo.current_system(session_app_data)
core = "somethingVeryCryptic{}".format(".".join(str(i) for i in current.version_info[0:3]))
name = "somethingVeryCryptic"
if case == "lower":
name = name.lower()
elif case == "upper":
name = name.upper()
exe_name = "{}{}{}".format(name, current.version_info.major, ".exe" if sys.platform == "win32" else "")
target = tmp_path / current.distutils_install["scripts"]
target.mkdir(parents=True)
executable = target / exe_name
os.symlink(sys.executable, ensure_text(str(executable)))
pyvenv_cfg = Path(sys.executable).parents[1] / "pyvenv.cfg"
if pyvenv_cfg.exists():
(target / pyvenv_cfg.name).write_bytes(pyvenv_cfg.read_bytes())
new_path = os.pathsep.join([str(target)] + os.environ.get(str("PATH"), str("")).split(os.pathsep))
monkeypatch.setenv(str("PATH"), new_path)
interpreter = get_interpreter(core)
assert interpreter is not None
def test_discovery_via_path_not_found(tmp_path, monkeypatch):
monkeypatch.setenv(str("PATH"), str(tmp_path))
interpreter = get_interpreter(uuid4().hex)
assert interpreter is None
def test_relative_path(tmp_path, session_app_data, monkeypatch):
sys_executable = Path(PythonInfo.current_system(app_data=session_app_data).system_executable)
cwd = sys_executable.parents[1]
monkeypatch.chdir(str(cwd))
relative = str(sys_executable.relative_to(cwd))
result = get_interpreter(relative, session_app_data)
assert result is not None
def test_discovery_fallback_fail(session_app_data, caplog):
caplog.set_level(logging.DEBUG)
builtin = Builtin(Namespace(app_data=session_app_data, python=["magic-one", "magic-two"]))
result = builtin.run()
assert result is None
assert "accepted" not in caplog.text
def test_discovery_fallback_ok(session_app_data, caplog):
caplog.set_level(logging.DEBUG)
builtin = Builtin(Namespace(app_data=session_app_data, python=["magic-one", sys.executable]))
result = builtin.run()
assert result is not None, caplog.text
assert result.executable == sys.executable, caplog.text
assert "accepted" in caplog.text