argument-duration-precision-exact-numerical-values.js (1231B)
1 // |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally 2 // Copyright (C) 2023 Igalia, S.L. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 esid: sec-temporal.duration.from 7 description: > 8 Duration-like argument performs the range check with minimal floating point 9 precision loss 10 features: [Temporal] 11 ---*/ 12 13 // Based on a test case by André Bargull 14 15 const cases = [ 16 [ 17 { 18 milliseconds: 4503599627370497_000, // ℝ(𝔽(4503599627370497000)) = 4503599627370497024 19 microseconds: 4503599627370495_000000, // ℝ(𝔽(4503599627370495000000)) = 4503599627370494951424 20 }, 21 // 4503599627370497024 / 1000 + 4503599627370494951424 / 1000000 is 22 // 9007199254740991.975424, which is below the limit of 2**53 23 "case where floating point inaccuracy brings total below limit, positive" 24 ], 25 [ 26 { 27 milliseconds: -4503599627370497_000, 28 microseconds: -4503599627370495_000000, 29 }, 30 "case where floating point inaccuracy brings total below limit, negative" 31 ], 32 ]; 33 34 for (const [arg, descr] of cases) { 35 assert.sameValue(Temporal.Duration.compare(arg, arg), 0, descr); 36 } 37 38 reportCompare(0, 0);