mirror of https://gitee.com/openkylin/nodejs.git
49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
'use strict';
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require('../common');
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const { StringDecoder } = require('string_decoder');
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const util = require('util');
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const assert = require('assert');
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// Tests that, for random sequences of bytes, our StringDecoder gives the
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// same result as a direction conversion using Buffer.toString().
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// In particular, it checks that StringDecoder aligns with V8’s own output.
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function rand(max) {
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return Math.floor(Math.random() * max);
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}
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function randBuf(maxLen) {
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const buf = Buffer.allocUnsafe(rand(maxLen));
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for (let i = 0; i < buf.length; i++)
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buf[i] = rand(256);
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return buf;
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}
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const encodings = [
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'utf16le', 'utf8', 'ascii', 'hex', 'base64', 'latin1'
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];
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function runSingleFuzzTest() {
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const enc = encodings[rand(encodings.length)];
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const sd = new StringDecoder(enc);
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const bufs = [];
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const strings = [];
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const N = rand(10);
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for (let i = 0; i < N; ++i) {
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const buf = randBuf(50);
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bufs.push(buf);
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strings.push(sd.write(buf));
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}
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strings.push(sd.end());
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assert.strictEqual(strings.join(''), Buffer.concat(bufs).toString(enc),
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`Mismatch:\n${util.inspect(strings)}\n` +
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util.inspect(bufs.map((buf) => buf.toString('hex'))) +
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`\nfor encoding ${enc}`);
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}
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const start = Date.now();
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while (Date.now() - start < 100)
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runSingleFuzzTest();
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