test_posixpath.py 文件源码

def test_realpath_symlink_loops(self):
        # Bug #930024, return the path unchanged if we get into an infinite
        # symlink loop.
        try:
            old_path = abspath('.')
            os.symlink(ABSTFN, ABSTFN)
            self.assertEqual(realpath(ABSTFN), ABSTFN)

            os.symlink(ABSTFN+"1", ABSTFN+"2")
            os.symlink(ABSTFN+"2", ABSTFN+"1")
            self.assertEqual(realpath(ABSTFN+"1"), ABSTFN+"1")
            self.assertEqual(realpath(ABSTFN+"2"), ABSTFN+"2")

            self.assertEqual(realpath(ABSTFN+"1/x"), ABSTFN+"1/x")
            self.assertEqual(realpath(ABSTFN+"1/.."), dirname(ABSTFN))
            self.assertEqual(realpath(ABSTFN+"1/../x"), dirname(ABSTFN) + "/x")
            os.symlink(ABSTFN+"x", ABSTFN+"y")
            self.assertEqual(realpath(ABSTFN+"1/../" + basename(ABSTFN) + "y"),
                             ABSTFN + "y")
            self.assertEqual(realpath(ABSTFN+"1/../" + basename(ABSTFN) + "1"),
                             ABSTFN + "1")

            os.symlink(basename(ABSTFN) + "a/b", ABSTFN+"a")
            self.assertEqual(realpath(ABSTFN+"a"), ABSTFN+"a/b")

            os.symlink("../" + basename(dirname(ABSTFN)) + "/" +
                       basename(ABSTFN) + "c", ABSTFN+"c")
            self.assertEqual(realpath(ABSTFN+"c"), ABSTFN+"c")

            # Test using relative path as well.
            os.chdir(dirname(ABSTFN))
            self.assertEqual(realpath(basename(ABSTFN)), ABSTFN)
        finally:
            os.chdir(old_path)
            support.unlink(ABSTFN)
            support.unlink(ABSTFN+"1")
            support.unlink(ABSTFN+"2")
            support.unlink(ABSTFN+"y")
            support.unlink(ABSTFN+"c")
            support.unlink(ABSTFN+"a")