# Testing importing of built-in submodules


import test.test_support, unittest
import sys

class BuiltinSubmoduleImportTest(unittest.TestCase):

    def test_import(self):
        self.assertIn("__xxpackage__.xx", sys.builtin_module_names)
        import __xxpackage__.xx
        import __xxpackage__.xx as a
        from __xxpackage__ import xx as b
        self.assertIs(__xxpackage__.xx, a)
        self.assertIs(__xxpackage__.xx, b)
        self.assertIn("__xxpackage__", sys.modules)
        self.assertIn("__xxpackage__.xx", sys.modules)
        self.assertEqual(sys.modules["__xxpackage__"], __xxpackage__)
        self.assertEqual(sys.modules["__xxpackage__.xx"], __xxpackage__.xx)
        self.assertTrue(hasattr(__xxpackage__, "__path__"))

if __name__ == '__main__':
    unittest.main()