deno.land / std@0.166.0 / node / _tools / test / parallel / test-buffer-readint.js
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// 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');
// Test OOB{ const buffer = Buffer.alloc(4);
['Int8', 'Int16BE', 'Int16LE', 'Int32BE', 'Int32LE'].forEach((fn) => {
// Verify that default offset works fine. buffer[`read${fn}`](undefined); buffer[`read${fn}`]();
['', '0', null, {}, [], () => {}, true, false].forEach((o) => { assert.throws( () => buffer[`read${fn}`](o), { code: 'ERR_INVALID_ARG_TYPE', name: 'TypeError' }); });
[Infinity, -1, -4294967295].forEach((offset) => { assert.throws( () => buffer[`read${fn}`](offset), { code: 'ERR_OUT_OF_RANGE', name: 'RangeError' }); });
[NaN, 1.01].forEach((offset) => { assert.throws( () => buffer[`read${fn}`](offset), { code: 'ERR_OUT_OF_RANGE', name: 'RangeError', message: 'The value of "offset" is out of range. ' + `It must be an integer. Received ${offset}` }); }); });}
// Test 8 bit signed integers{ const data = Buffer.from([0x23, 0xab, 0x7c, 0xef]);
assert.strictEqual(data.readInt8(0), 0x23);
data[0] = 0xff; assert.strictEqual(data.readInt8(0), -1);
data[0] = 0x87; assert.strictEqual(data.readInt8(0), -121); assert.strictEqual(data.readInt8(1), -85); assert.strictEqual(data.readInt8(2), 124); assert.strictEqual(data.readInt8(3), -17);}
// Test 16 bit integers{ const buffer = Buffer.from([0x16, 0x79, 0x65, 0x6e, 0x69, 0x78]);
assert.strictEqual(buffer.readInt16BE(0), 0x1679); assert.strictEqual(buffer.readInt16LE(0), 0x7916);
buffer[0] = 0xff; buffer[1] = 0x80; assert.strictEqual(buffer.readInt16BE(0), -128); assert.strictEqual(buffer.readInt16LE(0), -32513);
buffer[0] = 0x77; buffer[1] = 0x65; assert.strictEqual(buffer.readInt16BE(0), 0x7765); assert.strictEqual(buffer.readInt16BE(1), 0x6565); assert.strictEqual(buffer.readInt16BE(2), 0x656e); assert.strictEqual(buffer.readInt16BE(3), 0x6e69); assert.strictEqual(buffer.readInt16BE(4), 0x6978); assert.strictEqual(buffer.readInt16LE(0), 0x6577); assert.strictEqual(buffer.readInt16LE(1), 0x6565); assert.strictEqual(buffer.readInt16LE(2), 0x6e65); assert.strictEqual(buffer.readInt16LE(3), 0x696e); assert.strictEqual(buffer.readInt16LE(4), 0x7869);}
// Test 32 bit integers{ const buffer = Buffer.from([0x43, 0x53, 0x16, 0x79, 0x36, 0x17]);
assert.strictEqual(buffer.readInt32BE(0), 0x43531679); assert.strictEqual(buffer.readInt32LE(0), 0x79165343);
buffer[0] = 0xff; buffer[1] = 0xfe; buffer[2] = 0xef; buffer[3] = 0xfa; assert.strictEqual(buffer.readInt32BE(0), -69638); assert.strictEqual(buffer.readInt32LE(0), -84934913);
buffer[0] = 0x42; buffer[1] = 0xc3; buffer[2] = 0x95; buffer[3] = 0xa9; assert.strictEqual(buffer.readInt32BE(0), 0x42c395a9); assert.strictEqual(buffer.readInt32BE(1), -1013601994); assert.strictEqual(buffer.readInt32BE(2), -1784072681); assert.strictEqual(buffer.readInt32LE(0), -1449802942); assert.strictEqual(buffer.readInt32LE(1), 917083587); assert.strictEqual(buffer.readInt32LE(2), 389458325);}
// Test Int{ const buffer = Buffer.from([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]);
assert.strictEqual(buffer.readIntLE(0, 1), 0x01); assert.strictEqual(buffer.readIntBE(0, 1), 0x01); assert.strictEqual(buffer.readIntLE(0, 3), 0x030201); assert.strictEqual(buffer.readIntBE(0, 3), 0x010203); assert.strictEqual(buffer.readIntLE(0, 5), 0x0504030201); assert.strictEqual(buffer.readIntBE(0, 5), 0x0102030405); assert.strictEqual(buffer.readIntLE(0, 6), 0x060504030201); assert.strictEqual(buffer.readIntBE(0, 6), 0x010203040506); assert.strictEqual(buffer.readIntLE(1, 6), 0x070605040302); assert.strictEqual(buffer.readIntBE(1, 6), 0x020304050607); assert.strictEqual(buffer.readIntLE(2, 6), 0x080706050403); assert.strictEqual(buffer.readIntBE(2, 6), 0x030405060708);
// Check byteLength. ['readIntBE', 'readIntLE'].forEach((fn) => { ['', '0', null, {}, [], () => {}, true, false, undefined].forEach((len) => { assert.throws( () => buffer[fn](0, len), { code: 'ERR_INVALID_ARG_TYPE' }); });
[Infinity, -1].forEach((byteLength) => { assert.throws( () => buffer[fn](0, byteLength), { code: 'ERR_OUT_OF_RANGE', message: 'The value of "byteLength" is out of range. ' + `It must be >= 1 and <= 6. Received ${byteLength}` }); });
[NaN, 1.01].forEach((byteLength) => { assert.throws( () => buffer[fn](0, byteLength), { code: 'ERR_OUT_OF_RANGE', name: 'RangeError', message: 'The value of "byteLength" is out of range. ' + `It must be an integer. Received ${byteLength}` }); }); });
// Test 1 to 6 bytes. for (let i = 1; i <= 6; i++) { ['readIntBE', 'readIntLE'].forEach((fn) => { ['', '0', null, {}, [], () => {}, true, false, undefined].forEach((o) => { assert.throws( () => buffer[fn](o, i), { code: 'ERR_INVALID_ARG_TYPE', name: 'TypeError' }); });
[Infinity, -1, -4294967295].forEach((offset) => { assert.throws( () => buffer[fn](offset, i), { code: 'ERR_OUT_OF_RANGE', name: 'RangeError', message: 'The value of "offset" is out of range. ' + `It must be >= 0 and <= ${8 - i}. Received ${offset}` }); });
[NaN, 1.01].forEach((offset) => { assert.throws( () => buffer[fn](offset, i), { code: 'ERR_OUT_OF_RANGE', name: 'RangeError', message: 'The value of "offset" is out of range. ' + `It must be an integer. Received ${offset}` }); }); }); }}
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