Method test_file_move_permissionerror

tests/files/tests.py:446–500

file_move_safe() ignores PermissionError thrown by copystat() and copymode(). For example, PermissionError can be raised when the destination filesystem is CIFS, or when relabel is disabled by SELinux across filesystems.

(self)

        os.close(handle_b)

    def test_file_move_permissionerror(self):
        """
        file_move_safe() ignores PermissionError thrown by copystat() and
        copymode().
        For example, PermissionError can be raised when the destination
        filesystem is CIFS, or when relabel is disabled by SELinux across
        filesystems.
        """
        permission_error = PermissionError(errno.EPERM, "msg")
        os_error = OSError("msg")
        handle_a, self.file_a = tempfile.mkstemp()
        handle_b, self.file_b = tempfile.mkstemp()
        handle_c, self.file_c = tempfile.mkstemp()
        try:
            # This exception is required to reach the copystat() call in
            # file_safe_move().
            with mock.patch("django.core.files.move.os.rename", side_effect=OSError()):
                # An error besides PermissionError isn't ignored.
                with mock.patch(
                    "django.core.files.move.copystat", side_effect=os_error
                ):
                    with self.assertRaises(OSError):
                        file_move_safe(self.file_a, self.file_b, allow_overwrite=True)
                # When copystat() throws PermissionError, copymode() error
                # besides PermissionError isn't ignored.
                with mock.patch(
                    "django.core.files.move.copystat", side_effect=permission_error
                ):
                    with mock.patch(
                        "django.core.files.move.copymode", side_effect=os_error
                    ):
                        with self.assertRaises(OSError):
                            file_move_safe(
                                self.file_a, self.file_b, allow_overwrite=True
                            )
                # PermissionError raised by copystat() is ignored.
                with mock.patch(
                    "django.core.files.move.copystat", side_effect=permission_error
                ):
                    self.assertIsNone(
                        file_move_safe(self.file_a, self.file_b, allow_overwrite=True)
                    )
                    # PermissionError raised by copymode() is ignored too.
                    with mock.patch(
                        "django.core.files.move.copymode", side_effect=permission_error
                    ):
                        self.assertIsNone(
                            file_move_safe(
                                self.file_c, self.file_b, allow_overwrite=True
                            )
                        )
        finally:
            os.close(handle_a)
            os.close(handle_b)
            os.close(handle_c)

    def test_file_move_ensure_truncation(self):
        with tempfile.NamedTemporaryFile(delete=False) as src: