Method _check_rounding

Lib/test/test_time.py:913–956

(self, pytime_converter, expected_func,
                        use_float, unit_to_sec, value_filter=None)

        return ns_timestamps

    def _check_rounding(self, pytime_converter, expected_func,
                        use_float, unit_to_sec, value_filter=None):

        def convert_values(ns_timestamps):
            if use_float:
                unit_to_ns = SEC_TO_NS / float(unit_to_sec)
                values = [ns / unit_to_ns for ns in ns_timestamps]
            else:
                unit_to_ns = SEC_TO_NS // unit_to_sec
                values = [ns // unit_to_ns for ns in ns_timestamps]

            if value_filter:
                values = filter(value_filter, values)

            # remove duplicates and sort
            return sorted(set(values))

        # test rounding
        ns_timestamps = self._rounding_values(use_float)
        valid_values = convert_values(ns_timestamps)
        for time_rnd, decimal_rnd in ROUNDING_MODES:
            with decimal.localcontext() as context:
                context.rounding = decimal_rnd

                for value in valid_values:
                    debug_info = {'value': value, 'rounding': decimal_rnd}
                    try:
                        result = pytime_converter(value, time_rnd)
                        expected = expected_func(value)
                    except Exception:
                        self.fail("Error on timestamp conversion: %s" % debug_info)
                    self.assertEqual(result,
                                     expected,
                                     debug_info)

        # test overflow
        ns = self.OVERFLOW_SECONDS * SEC_TO_NS
        ns_timestamps = (-ns, ns)
        overflow_values = convert_values(ns_timestamps)
        for time_rnd, _ in ROUNDING_MODES :
            for value in overflow_values:
                debug_info = {'value': value, 'rounding': time_rnd}
                with self.assertRaises(OverflowError, msg=debug_info):
                    pytime_converter(value, time_rnd)

    def check_int_rounding(self, pytime_converter, expected_func,
                           unit_to_sec=1, value_filter=None):