test262/test/built-ins/Temporal/PlainTime/from/argument-string-time-designator-required-for-disambiguation.js

// Copyright (C) 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-temporal.plaintime.from
description: ISO 8601 time designator "T" required in cases of ambiguity
features: [Temporal, arrow-function]
---*/

const ambiguousStrings = [
  "2021-12",  // ambiguity between YYYY-MM and HHMM-UU
  "1214",     // ambiguity between MMDD and HHMM
  "0229",     //   ditto, including MMDD that doesn't occur every year
  "1130",     //   ditto, including DD that doesn't occur in every month
  "12-14",    // ambiguity between MM-DD and HH-UU
  "202112",   // ambiguity between YYYYMM and HHMMSS
];
ambiguousStrings.forEach((string) => {
  let arg = string;
  assert.throws(
    RangeError,
    () => Temporal.PlainTime.from(arg),
    `${string} is ambiguous and requires T prefix`
  );
  // The same string with a T prefix should not throw:
  arg = `T${string}`;
  Temporal.PlainTime.from(arg);

  arg = ` ${string}`;
  assert.throws(
    RangeError,
    () => Temporal.PlainTime.from(arg),
    'space is not accepted as a substitute for T prefix'
  );
});

// None of these should throw without a T prefix, because they are unambiguously time strings:
const unambiguousStrings = [
  "2021-13",  // 13 is not a month
  "202113",   //   ditto
  "0000-00",  // 0 is not a month
  "000000",   //   ditto
  "1314",     // 13 is not a month
  "13-14",    //   ditto
  "1232",     // 32 is not a day
  "0230",     // 30 is not a day in February
  "0631",     // 31 is not a day in June
  "0000",     // 0 is neither a month nor a day
  "00-00",    //   ditto
];
unambiguousStrings.forEach((arg) => Temporal.PlainTime.from(arg));