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| 1 | +// Flags: --expose-internals |
| 2 | +'use strict'; |
| 3 | + |
| 4 | +require('../common'); |
| 5 | +const assert = require('assert'); |
| 6 | +const { convertToInt, evenRound } = require('internal/webidl'); |
| 7 | + |
| 8 | +assert.strictEqual(evenRound(-0.5), 0); |
| 9 | +assert.strictEqual(evenRound(0.5), 0); |
| 10 | +assert.strictEqual(evenRound(-1.5), -2); |
| 11 | +assert.strictEqual(evenRound(1.5), 2); |
| 12 | +assert.strictEqual(evenRound(3.4), 3); |
| 13 | +assert.strictEqual(evenRound(4.6), 5); |
| 14 | +assert.strictEqual(evenRound(5), 5); |
| 15 | +assert.strictEqual(evenRound(6), 6); |
| 16 | + |
| 17 | +// https://webidl.spec.whatwg.org/#abstract-opdef-converttoint |
| 18 | +assert.strictEqual(convertToInt('x', 0, 64), 0); |
| 19 | +assert.strictEqual(convertToInt('x', 1, 64), 1); |
| 20 | +assert.strictEqual(convertToInt('x', -0.5, 64), 0); |
| 21 | +assert.strictEqual(convertToInt('x', -0.5, 64, { signed: true }), 0); |
| 22 | +assert.strictEqual(convertToInt('x', -1.5, 64, { signed: true }), -1); |
| 23 | + |
| 24 | +// EnforceRange |
| 25 | +const OutOfRangeValues = [ NaN, Infinity, -Infinity, 2 ** 53, -(2 ** 53) ]; |
| 26 | +for (const value of OutOfRangeValues) { |
| 27 | + assert.throws(() => convertToInt('x', value, 64, { enforceRange: true }), { |
| 28 | + name: 'TypeError', |
| 29 | + code: 'ERR_INVALID_ARG_VALUE', |
| 30 | + }); |
| 31 | +} |
| 32 | + |
| 33 | +// Out of range: clamp |
| 34 | +assert.strictEqual(convertToInt('x', NaN, 64, { clamp: true }), 0); |
| 35 | +assert.strictEqual(convertToInt('x', Infinity, 64, { clamp: true }), Number.MAX_SAFE_INTEGER); |
| 36 | +assert.strictEqual(convertToInt('x', -Infinity, 64, { clamp: true }), 0); |
| 37 | +assert.strictEqual(convertToInt('x', -Infinity, 64, { signed: true, clamp: true }), Number.MIN_SAFE_INTEGER); |
| 38 | +assert.strictEqual(convertToInt('x', 0x1_0000_0000, 32, { clamp: true }), 0xFFFF_FFFF); |
| 39 | +assert.strictEqual(convertToInt('x', 0xFFFF_FFFF, 32, { clamp: true }), 0xFFFF_FFFF); |
| 40 | +assert.strictEqual(convertToInt('x', 0x8000_0000, 32, { clamp: true, signed: true }), 0x7FFF_FFFF); |
| 41 | +assert.strictEqual(convertToInt('x', 0xFFFF_FFFF, 32, { clamp: true, signed: true }), 0x7FFF_FFFF); |
| 42 | +assert.strictEqual(convertToInt('x', 0.5, 64, { clamp: true }), 0); |
| 43 | +assert.strictEqual(convertToInt('x', 1.5, 64, { clamp: true }), 2); |
| 44 | +assert.strictEqual(convertToInt('x', -0.5, 64, { clamp: true }), 0); |
| 45 | +assert.strictEqual(convertToInt('x', -0.5, 64, { signed: true, clamp: true }), 0); |
| 46 | +assert.strictEqual(convertToInt('x', -1.5, 64, { signed: true, clamp: true }), -2); |
| 47 | + |
| 48 | +// Out of range, step 8. |
| 49 | +assert.strictEqual(convertToInt('x', NaN, 64), 0); |
| 50 | +assert.strictEqual(convertToInt('x', Infinity, 64), 0); |
| 51 | +assert.strictEqual(convertToInt('x', -Infinity, 64), 0); |
| 52 | +assert.strictEqual(convertToInt('x', 0x1_0000_0000, 32), 0); |
| 53 | +assert.strictEqual(convertToInt('x', 0x1_0000_0001, 32), 1); |
| 54 | +assert.strictEqual(convertToInt('x', 0xFFFF_FFFF, 32), 0xFFFF_FFFF); |
| 55 | + |
| 56 | +// Out of range, step 11. |
| 57 | +assert.strictEqual(convertToInt('x', 0x8000_0000, 32, { signed: true }), -0x8000_0000); |
| 58 | +assert.strictEqual(convertToInt('x', 0xFFF_FFFF, 32, { signed: true }), 0xFFF_FFFF); |
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