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# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import platform
import pytest
import spack
from spack.main import SpackCommand
python = SpackCommand('python')
def test_python():
out = python('-c', 'import spack; print(spack.spack_version)')
assert out.strip() == spack.spack_version
def test_python_version():
out = python('-V')
assert platform.python_version() in out
def test_python_with_module():
# pytest rewrites a lot of modules, which interferes with runpy, so
# it's hard to test this. Trying to import a module like sys, that
# has no code associated with it, raises an error reliably in python
# 2 and 3, which indicates we successfully ran runpy.run_module.
with pytest.raises(ImportError, match="No code object"):
python('-m', 'sys')
def test_python_raises():
out = python('--foobar', fail_on_error=False)
assert "Error: Unknown arguments" in out
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