70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
/**
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* Node regression tests for Web Serial readUntil buffer handling.
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* Run: node led-tool/static/web_serial_readuntil_test.mjs
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*/
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function bytesIndexOf(buf, suffix) {
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if (!suffix.length) return 0;
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if (buf.length < suffix.length) return -1;
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for (let i = 0; i <= buf.length - suffix.length; i += 1) {
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let ok = true;
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for (let j = 0; j < suffix.length; j += 1) {
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if (buf[i + j] !== suffix[j]) {
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ok = false;
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break;
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}
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}
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if (ok) return i;
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}
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return -1;
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}
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function readUntilConsume(rxBuf, suffixBytes) {
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const idx = bytesIndexOf(rxBuf, suffixBytes);
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if (idx < 0) return null;
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const end = idx + suffixBytes.length;
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const matched = rxBuf.slice(0, end);
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rxBuf.splice(0, end);
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return matched;
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}
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function enc(s) {
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return [...new TextEncoder().encode(s)];
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}
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function assert(cond, msg) {
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if (!cond) throw new Error(msg);
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}
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const RAW = 'raw REPL; CTRL-B to exit\r\n';
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const SOFT = 'soft reboot\r\n';
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// Old bug: one chunk with soft reboot + banner; suffix-at-end + clear-all loses banner.
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{
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const rx = enc(`MPY: ${SOFT}${RAW}boot.py line\r\n`);
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const soft = enc(SOFT);
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const m1 = readUntilConsume(rx, soft);
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assert(m1 !== null, 'soft reboot should match');
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const banner = enc(RAW);
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const m2 = readUntilConsume(rx, banner);
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assert(m2 !== null, 'banner must remain in buffer after soft reboot match');
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assert(rx.length > 0, 'boot.py tail should remain after banner');
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}
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// Banner anywhere in buffer, not only at end.
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{
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const rx = enc(`noise${RAW}>>> `);
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const banner = enc(RAW);
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const m = readUntilConsume(rx, banner);
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assert(m !== null, 'banner should match mid-buffer');
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}
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// MPY: soft reboot marker
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{
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const rx = enc(`MPY: ${SOFT}`);
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const soft = enc('MPY: soft reboot\r\n');
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assert(readUntilConsume(rx, soft) !== null, 'MPY soft reboot marker');
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}
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console.log('web_serial_readuntil_test: ok');
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