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140 lines
4.1 KiB
JavaScript
140 lines
4.1 KiB
JavaScript
// deno-fmt-ignore-file
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// deno-lint-ignore-file
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.
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// Taken from Node 18.12.1
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// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
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'use strict';
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// Tests to verify doubles are correctly written
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require('../common');
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const assert = require('assert');
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const buffer = Buffer.allocUnsafe(16);
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buffer.writeDoubleBE(2.225073858507201e-308, 0);
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buffer.writeDoubleLE(2.225073858507201e-308, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f, 0x00,
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])));
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buffer.writeDoubleBE(1.0000000000000004, 0);
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buffer.writeDoubleLE(1.0000000000000004, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0x3f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
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0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f,
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])));
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buffer.writeDoubleBE(-2, 0);
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buffer.writeDoubleLE(-2, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0,
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])));
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buffer.writeDoubleBE(1.7976931348623157e+308, 0);
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buffer.writeDoubleLE(1.7976931348623157e+308, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0x7f, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xef, 0x7f,
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])));
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buffer.writeDoubleBE(0 * -1, 0);
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buffer.writeDoubleLE(0 * -1, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
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])));
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buffer.writeDoubleBE(Infinity, 0);
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buffer.writeDoubleLE(Infinity, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x7F,
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])));
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assert.strictEqual(buffer.readDoubleBE(0), Infinity);
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assert.strictEqual(buffer.readDoubleLE(8), Infinity);
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buffer.writeDoubleBE(-Infinity, 0);
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buffer.writeDoubleLE(-Infinity, 8);
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assert.ok(buffer.equals(new Uint8Array([
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0xFF, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0xFF,
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])));
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assert.strictEqual(buffer.readDoubleBE(0), -Infinity);
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assert.strictEqual(buffer.readDoubleLE(8), -Infinity);
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buffer.writeDoubleBE(NaN, 0);
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buffer.writeDoubleLE(NaN, 8);
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// JS only knows a single NaN but there exist two platform specific
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// implementations. Therefore, allow both quiet and signalling NaNs.
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if (buffer[1] === 0xF7) {
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assert.ok(buffer.equals(new Uint8Array([
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0x7F, 0xF7, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF7, 0x7F,
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])));
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} else {
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assert.ok(buffer.equals(new Uint8Array([
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0x7F, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0x7F,
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])));
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}
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assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
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assert.ok(Number.isNaN(buffer.readDoubleLE(8)));
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// OOB in writeDouble{LE,BE} should throw.
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{
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const small = Buffer.allocUnsafe(1);
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['writeDoubleLE', 'writeDoubleBE'].forEach((fn) => {
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// Verify that default offset works fine.
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buffer[fn](23, undefined);
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buffer[fn](23);
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assert.throws(
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() => small[fn](11.11, 0),
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{
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code: 'ERR_BUFFER_OUT_OF_BOUNDS',
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name: 'RangeError',
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message: 'Attempt to access memory outside buffer bounds'
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});
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['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
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assert.throws(
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() => small[fn](23, off),
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{ code: 'ERR_INVALID_ARG_TYPE' });
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});
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[Infinity, -1, 9].forEach((offset) => {
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assert.throws(
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() => buffer[fn](23, offset),
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{
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code: 'ERR_OUT_OF_RANGE',
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name: 'RangeError',
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message: 'The value of "offset" is out of range. ' +
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`It must be >= 0 and <= 8. Received ${offset}`
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});
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});
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[NaN, 1.01].forEach((offset) => {
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assert.throws(
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() => buffer[fn](42, offset),
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{
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code: 'ERR_OUT_OF_RANGE',
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name: 'RangeError',
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message: 'The value of "offset" is out of range. ' +
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`It must be an integer. Received ${offset}`
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});
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});
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});
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}
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