from test import support import unittest import select import os import sys @unittest.skipIf(sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'), "can't easily test on this system") 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_returned_list_identity(self): # See issue #8329 r, w, x = select.select([], [], [], 1) self.assertIsNot(r, w) self.assertIsNot(r, x) self.assertIsNot(w, x) def test_select(self): 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 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 support.verbose: print(repr(line)) if not line: if support.verbose: print('EOF') break continue self.fail('Unexpected return values from select():', rfd, wfd, xfd) p.close() def test_main(): support.run_unittest(SelectTestCase) support.reap_children() if __name__ == "__main__": test_main()