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nixpkgs/pkgs/development/interpreters/python/tests/test_python.py
Frederik Rietdijk 7447fff95a
Fix sys.prefix in case of a Nix env
The prefix will now be correct in case of Nix env.

Note, however, that creating a venv from a Nix env still does not function. This does not seem to be possible
with the current approach either, because venv will copy or symlink our Python wrapper. In case it symlinks
(the default) it won't see a pyvenv.cfg. If it is copied I think it should function but it does not...
2020-03-14 21:39:32 +00:00

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Python

"""
Python interpreter and environment tests.
These need to be executed with the standard library unittest.
Third party test runners such as pytest cannot be used because
that would interfere with the tests.
"""
import platform
import sys
import unittest
import site
ENV = "@env@"
INTERPRETER = "@interpreter@"
PYTHON_VERSION = "@pythonVersion@"
IS_VENV = @is_venv@
IS_NIXENV = @is_nixenv@
IS_PYPY = platform.python_implementation() == "PyPy"
class TestCasePython(unittest.TestCase):
@unittest.skipIf(IS_PYPY, "Executable is incorrect and needs to be fixed.")
def test_interpreter(self):
self.assertEqual(sys.executable, INTERPRETER)
@unittest.skipIf(IS_PYPY, "Prefix is incorrect and needs to be fixed.")
def test_prefix(self):
self.assertEqual(sys.prefix, ENV)
self.assertEqual(sys.prefix, sys.exec_prefix)
def test_site_prefix(self):
self.assertTrue(sys.prefix in site.PREFIXES)
@unittest.skipIf(IS_PYPY or sys.version_info.major==2, "Python 2 does not have base_prefix")
def test_base_prefix(self):
if IS_VENV or IS_NIXENV:
self.assertNotEqual(sys.prefix, sys.base_prefix)
else:
self.assertEqual(sys.prefix, sys.base_prefix)
def test_python_version(self):
self.assertTrue(platform.python_version().startswith(PYTHON_VERSION))
if __name__ == "__main__":
unittest.main()