def test_version(versionarg, capsys):
with raises(SystemExit) as exc_info:
main(['progname', versionarg])
out, err = capsys.readouterr()
# Should print out version.
assert err == '{0} {1}\n'.format(metadata.project, metadata.version)
# Should exit with zero return code.
assert exc_info.value.code == 0
def test_help(helparg, capsys):
with raises(SystemExit) as exc_info:
main(['progname', helparg])
out, err = capsys.readouterr()
# Should have printed some sort of usage message. We don't
# need to explicitly test the content of the message.
assert 'usage' in out
# Should have used the program name from the argument
# vector.
assert 'progname' in out
# Should exit with zero return code.
assert exc_info.value.code == 0