Дмитрий
41 lines
1.7 KiB
JavaScript
41 lines
1.7 KiB
JavaScript
import { describe, it, expect } from 'vitest';
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import { readStdinAsUtf8 } from './router-stdin-helper.mjs';
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async function* fromBuffers(buffers) {
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for (const b of buffers) yield b;
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}
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describe('readStdinAsUtf8', () => {
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it('decodes UTF-8 cyrillic correctly across chunk boundaries', async () => {
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const text = 'посмотри сторожа достаточно ему информации?';
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const buf = Buffer.from(text, 'utf-8');
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// Split across multi-byte boundary (UTF-8 cyrillic = 2 bytes per char)
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const mid = 9; // mid-byte split for 'посмо|три...'
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const result = await readStdinAsUtf8(fromBuffers([buf.subarray(0, mid), buf.subarray(mid)]));
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expect(result).toBe(text);
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});
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it('handles ASCII without modification', async () => {
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const text = 'hello world';
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const result = await readStdinAsUtf8(fromBuffers([Buffer.from(text)]));
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expect(result).toBe(text);
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});
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it('returns empty string on empty stream', async () => {
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const result = await readStdinAsUtf8(fromBuffers([]));
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expect(result).toBe('');
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});
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it('does NOT mangle byte-level concatenation (regression guard)', async () => {
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// The bug: `for await (const c of stdin) input += c` interprets Buffer
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// via Buffer.prototype.toString() = 'utf-8' by default in Node, BUT
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// concatenation across chunks at multi-byte boundary fails.
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// Our helper must use a StringDecoder to handle the boundary.
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const cyrillic = 'тест';
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const buf = Buffer.from(cyrillic, 'utf-8');
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// Split exactly in the middle of 'т' (2-byte char)
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const result = await readStdinAsUtf8(fromBuffers([buf.subarray(0, 1), buf.subarray(1)]));
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expect(result).toBe(cyrillic);
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});
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});
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