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d5495e859c
If none is provided, use zero as a default offset for all read/write operations on the buffer. PR-URL: https://github.com/nodejs/node/pull/19749 Refs: https://github.com/nodejs/node/pull/18395 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
108 lines
3.1 KiB
JavaScript
108 lines
3.1 KiB
JavaScript
'use strict';
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// Tests to verify floats 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(8);
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buffer.writeFloatBE(1, 0);
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buffer.writeFloatLE(1, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x3f, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f ])));
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buffer.writeFloatBE(1 / 3, 0);
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buffer.writeFloatLE(1 / 3, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x3e, 0xaa, 0xaa, 0xab, 0xab, 0xaa, 0xaa, 0x3e ])));
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buffer.writeFloatBE(3.4028234663852886e+38, 0);
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buffer.writeFloatLE(3.4028234663852886e+38, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x7f, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0x7f ])));
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buffer.writeFloatLE(1.1754943508222875e-38, 0);
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buffer.writeFloatBE(1.1754943508222875e-38, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x00, 0x00, 0x80, 0x00, 0x00, 0x80, 0x00, 0x00 ])));
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buffer.writeFloatBE(0 * -1, 0);
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buffer.writeFloatLE(0 * -1, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80 ])));
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buffer.writeFloatBE(Infinity, 0);
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buffer.writeFloatLE(Infinity, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x7F, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x7F ])));
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assert.strictEqual(buffer.readFloatBE(0), Infinity);
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assert.strictEqual(buffer.readFloatLE(4), Infinity);
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buffer.writeFloatBE(-Infinity, 0);
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buffer.writeFloatLE(-Infinity, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0xFF, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0xFF ])));
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assert.strictEqual(buffer.readFloatBE(0), -Infinity);
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assert.strictEqual(buffer.readFloatLE(4), -Infinity);
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buffer.writeFloatBE(NaN, 0);
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buffer.writeFloatLE(NaN, 4);
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assert.ok(buffer.equals(
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new Uint8Array([ 0x7F, 0xC0, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x7F ])));
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assert.ok(Number.isNaN(buffer.readFloatBE(0)));
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assert.ok(Number.isNaN(buffer.readFloatLE(4)));
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// OOB in writeFloat{LE,BE} should throw.
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{
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const small = Buffer.allocUnsafe(1);
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['writeFloatLE', 'writeFloatBE'].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 [ERR_BUFFER_OUT_OF_BOUNDS]',
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message: 'Attempt to write 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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});
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[Infinity, -1, 5].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 [ERR_OUT_OF_RANGE]',
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message: 'The value of "offset" is out of range. ' +
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`It must be >= 0 and <= 4. Received ${offset}`
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}
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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 [ERR_OUT_OF_RANGE]',
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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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