Showing content from http://svn.python.org/projects/python/branches/test_subprocess_10826/Lib/test/test_osx_env.py below:
""" Test suite for OS X interpreter environment variables. """ from test.support import EnvironmentVarGuard, run_unittest import subprocess import sys import unittest class OSXEnvironmentVariableTestCase(unittest.TestCase): def _check_sys(self, ev, cond, sv, val = sys.executable + 'dummy'): with EnvironmentVarGuard() as evg: subpc = [str(sys.executable), '-c', 'import sys; sys.exit(2 if "%s" %s %s else 3)' % (val, cond, sv)] # ensure environment variable does not exist evg.unset(ev) # test that test on sys.xxx normally fails rc = subprocess.call(subpc) self.assertEqual(rc, 3, "expected %s not %s %s" % (ev, cond, sv)) # set environ variable evg.set(ev, val) # test that sys.xxx has been influenced by the environ value rc = subprocess.call(subpc) self.assertEqual(rc, 2, "expected %s %s %s" % (ev, cond, sv)) def test_pythonexecutable_sets_sys_executable(self): self._check_sys('PYTHONEXECUTABLE', '==', 'sys.executable') def test_main(): from distutils import sysconfig if sys.platform == 'darwin' and sysconfig.get_config_var('WITH_NEXT_FRAMEWORK'): run_unittest(OSXEnvironmentVariableTestCase) if __name__ == "__main__": test_main()
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