deno.land / std@0.166.0 / node / _tools / test / parallel / test-buffer-read.js

test-buffer-read.js
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// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';require('../common');const assert = require('assert');
// Testing basic buffer read functionsconst buf = Buffer.from([0xa4, 0xfd, 0x48, 0xea, 0xcf, 0xff, 0xd9, 0x01, 0xde]);
function read(buff, funx, args, expected) { assert.strictEqual(buff[funx](...args), expected); assert.throws( () => buff[funx](-1, args[1]), { code: 'ERR_OUT_OF_RANGE' } );}
// Testing basic functionality of readDoubleBE() and readDoubleLE()read(buf, 'readDoubleBE', [1], -3.1827727774563287e+295);read(buf, 'readDoubleLE', [1], -6.966010051009108e+144);
// Testing basic functionality of readFloatBE() and readFloatLE()read(buf, 'readFloatBE', [1], -1.6691549692541768e+37);read(buf, 'readFloatLE', [1], -7861303808);
// Testing basic functionality of readInt8()read(buf, 'readInt8', [1], -3);
// Testing basic functionality of readInt16BE() and readInt16LE()read(buf, 'readInt16BE', [1], -696);read(buf, 'readInt16LE', [1], 0x48fd);
// Testing basic functionality of readInt32BE() and readInt32LE()read(buf, 'readInt32BE', [1], -45552945);read(buf, 'readInt32LE', [1], -806729475);
// Testing basic functionality of readIntBE() and readIntLE()read(buf, 'readIntBE', [1, 1], -3);read(buf, 'readIntLE', [2, 1], 0x48);
// Testing basic functionality of readUInt8()read(buf, 'readUInt8', [1], 0xfd);
// Testing basic functionality of readUInt16BE() and readUInt16LE()read(buf, 'readUInt16BE', [2], 0x48ea);read(buf, 'readUInt16LE', [2], 0xea48);
// Testing basic functionality of readUInt32BE() and readUInt32LE()read(buf, 'readUInt32BE', [1], 0xfd48eacf);read(buf, 'readUInt32LE', [1], 0xcfea48fd);
// Testing basic functionality of readUIntBE() and readUIntLE()read(buf, 'readUIntBE', [2, 2], 0x48ea);read(buf, 'readUIntLE', [2, 2], 0xea48);
// Error name and messageconst OOR_ERROR ={ name: 'RangeError'};
const OOB_ERROR ={ name: 'RangeError', message: 'Attempt to access memory outside buffer bounds'};
// Attempt to overflow buffers, similar to previous bug in array buffersassert.throws( () => Buffer.allocUnsafe(8).readFloatBE(0xffffffff), OOR_ERROR);
assert.throws( () => Buffer.allocUnsafe(8).readFloatLE(0xffffffff), OOR_ERROR);
// Ensure negative values can't get past offsetassert.throws( () => Buffer.allocUnsafe(8).readFloatBE(-1), OOR_ERROR);assert.throws( () => Buffer.allocUnsafe(8).readFloatLE(-1), OOR_ERROR);
// Offset checks{ const buf = Buffer.allocUnsafe(0);
assert.throws( () => buf.readUInt8(0), OOB_ERROR); assert.throws( () => buf.readInt8(0), OOB_ERROR);}
[16, 32].forEach((bit) => { const buf = Buffer.allocUnsafe(bit / 8 - 1); [`Int${bit}B`, `Int${bit}L`, `UInt${bit}B`, `UInt${bit}L`].forEach((fn) => { assert.throws( () => buf[`read${fn}E`](0), OOB_ERROR); });});
[16, 32].forEach((bits) => { const buf = Buffer.from([0xFF, 0xFF, 0xFF, 0xFF]); ['LE', 'BE'].forEach((endian) => { assert.strictEqual(buf[`readUInt${bits}${endian}`](0), (0xFFFFFFFF >>> (32 - bits)));
assert.strictEqual(buf[`readInt${bits}${endian}`](0), (0xFFFFFFFF >> (32 - bits))); });});
std

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Tagged at
a year ago