cpython/Lib/test/test_startfile.py

# Ridiculously simple test of the os.startfile function for Windows.
#
# empty.vbs is an empty file (except for a comment), which does
# nothing when run with cscript or wscript.
#
# A possible improvement would be to have empty.vbs do something that
# we can detect here, to make sure that not only the os.startfile()
# call succeeded, but also the the script actually has run.

import unittest
from test import support
import os
from os import path
from time import sleep

startfile = support.get_attribute(os, 'startfile')


class TestCase(unittest.TestCase):
    def test_nonexisting(self):
        self.assertRaises(OSError, startfile, "nonexisting.vbs")

    def test_empty(self):
        empty = path.join(path.dirname(__file__), "empty.vbs")
        startfile(empty)
        startfile(empty, "open")
        # Give the child process some time to exit before we finish.
        # Otherwise the cleanup code will not be able to delete the cwd,
        # because it is still in use.
        sleep(0.1)

def test_main():
    support.run_unittest(TestCase)

if __name__=="__main__":
    test_main()