mirror of https://github.com/tc39/test262.git
39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
|
// Copyright (C) 2023 Igalia, S.L. All rights reserved.
|
|||
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|||
|
|
|
|||
|
|
/*---
|
|||
|
|
esid: sec-temporal.duration.from
|
|||
|
|
description: >
|
|||
|
|
Duration-like argument performs the range check with minimal floating point
|
|||
|
|
precision loss
|
|||
|
|
features: [Temporal]
|
|||
|
|
---*/
|
|||
|
|
|
|||
|
|
// Based on a test case by André Bargull
|
|||
|
|
|
|||
|
|
const cases = [
|
|||
|
|
[
|
|||
|
|
{
|
|||
|
|
milliseconds: 4503599627370497_000, // ℝ(𝔽(4503599627370497000)) = 4503599627370497024
|
|||
|
|
microseconds: 4503599627370495_000000, // ℝ(𝔽(4503599627370495000000)) = 4503599627370494951424
|
|||
|
|
},
|
|||
|
|
// 4503599627370497024 / 1000 + 4503599627370494951424 / 1000000 is
|
|||
|
|
// 9007199254740991.975424, which is below the limit of 2**53
|
|||
|
|
"PT9007199254740991.975424S",
|
|||
|
|
"case where floating point inaccuracy brings total below limit, positive"
|
|||
|
|
],
|
|||
|
|
[
|
|||
|
|
{
|
|||
|
|
milliseconds: -4503599627370497_000,
|
|||
|
|
microseconds: -4503599627370495_000000,
|
|||
|
|
},
|
|||
|
|
"-PT9007199254740991.975424S",
|
|||
|
|
"case where floating point inaccuracy brings total below limit, negative"
|
|||
|
|
],
|
|||
|
|
];
|
|||
|
|
|
|||
|
|
for (const [arg, string, descr] of cases) {
|
|||
|
|
const instance = Temporal.Duration.from(arg); // should not throw
|
|||
|
|
assert.sameValue(instance.toString(), string, descr);
|
|||
|
|
}
|