from test import test_support

import unittest

import select

import os

import sys

class SelectTestCase(unittest.TestCase):

    class Nope:

        pass

    class Almost:

        def fileno(self):

            return 'fileno'

    def test_error_conditions(self):

        self.assertRaises(TypeError, select.select, 1, 2, 3)

        self.assertRaises(TypeError, select.select, [self.Nope()], [], [])

        self.assertRaises(TypeError, select.select, [self.Almost()], [], [])

        self.assertRaises(TypeError, select.select, [], [], [], "not a number")

    def test_select(self):

        if sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'):

            if test_support.verbose:

                print "Can't test select easily on", sys.platform

            return

        cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'

        p = os.popen(cmd, 'r')

        for tout in (0, 1, 2, 4, 8, 16) + (None,)*10:

            if test_support.verbose:

                print 'timeout =', tout

            rfd, wfd, xfd = select.select([p], [], [], tout)

            if (rfd, wfd, xfd) == ([], [], []):

                continue

            if (rfd, wfd, xfd) == ([p], [], []):

                line = p.readline()

                if test_support.verbose:

                    print repr(line)

                if not line:

                    if test_support.verbose:

                        print 'EOF'

                    break

                continue

            self.fail('Unexpected return values from select():', rfd, wfd, xfd)

        p.close()

def test_main():

    test_support.run_unittest(SelectTestCase)

    test_support.reap_children()

if __name__ == "__main__":

    test_main()