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| Current File : //proc/self/root/proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-string-decoder-fuzz.js |
'use strict';
require('../common');
const { StringDecoder } = require('string_decoder');
const util = require('util');
const assert = require('assert');
// Tests that, for random sequences of bytes, our StringDecoder gives the
// same result as a direction conversion using Buffer.toString().
// In particular, it checks that StringDecoder aligns with V8’s own output.
function rand(max) {
return Math.floor(Math.random() * max);
}
function randBuf(maxLen) {
const buf = Buffer.allocUnsafe(rand(maxLen));
for (let i = 0; i < buf.length; i++)
buf[i] = rand(256);
return buf;
}
const encodings = [
'utf16le', 'utf8', 'ascii', 'hex', 'base64', 'latin1', 'base64url',
];
function runSingleFuzzTest() {
const enc = encodings[rand(encodings.length)];
const sd = new StringDecoder(enc);
const bufs = [];
const strings = [];
const N = rand(10);
for (let i = 0; i < N; ++i) {
const buf = randBuf(50);
bufs.push(buf);
strings.push(sd.write(buf));
}
strings.push(sd.end());
assert.strictEqual(strings.join(''), Buffer.concat(bufs).toString(enc),
`Mismatch:\n${util.inspect(strings)}\n` +
util.inspect(bufs.map((buf) => buf.toString('hex'))) +
`\nfor encoding ${enc}`);
}
const start = Date.now();
while (Date.now() - start < 100)
runSingleFuzzTest();
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