197 lines
8.7 KiB
TypeScript
197 lines
8.7 KiB
TypeScript
import assert from "node:assert/strict";
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import { spawn } from "node:child_process";
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import { EventEmitter, once } from "node:events";
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import fs from "node:fs";
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import { createRequire } from "node:module";
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import os from "node:os";
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import path from "node:path";
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import { describe, it } from "node:test";
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import type { TestContext } from "node:test";
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import { fileURLToPath } from "node:url";
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import { createContext, runInContext } from "node:vm";
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const require = createRequire(import.meta.url);
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const { createDesktopLogger, MAX_LOG_BYTES } = require("../electron/desktop-logger.cjs");
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const mainFile = fileURLToPath(new URL("../electron/main.cjs", import.meta.url));
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const mainRequire = createRequire(mainFile);
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function directory(t: TestContext) {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), "lh-desktop-logger-"));
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t.after(() => fs.rmSync(dir, { recursive: true, force: true }));
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return dir;
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}
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function retained(dir: string, cap: number) {
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const names = fs.readdirSync(dir).sort();
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assert.ok(names.length <= 2);
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for (const name of names) {
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assert.ok(["main.log", "main.log.1"].includes(name));
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assert.ok(fs.statSync(path.join(dir, name)).size <= cap, `${name} exceeds the byte cap`);
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}
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return ["main.log.1", "main.log"].filter(name => names.includes(name)).map(name => fs.readFileSync(path.join(dir, name), "utf8")).join("");
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}
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class Output extends EventEmitter {
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writes = 0;
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write() { this.writes++; return true; }
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}
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describe("bounded desktop logs", () => {
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it("rotates repeated floods within two 5 MiB files and keeps the latest entries", (t) => {
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const dir = directory(t);
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assert.equal(MAX_LOG_BYTES, 5 * 1024 * 1024);
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const logger = createDesktopLogger({ directory: () => dir });
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for (let i = 0; i < 35; i++) logger.log(`${i} ${"x".repeat(1024 * 1024)}`);
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logger.log("most recent diagnostic");
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const text = retained(dir, MAX_LOG_BYTES);
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assert.match(text, /most recent diagnostic\n$/);
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assert.doesNotMatch(text, /\] 0 /);
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});
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it("trims both existing files on startup using a bounded tail read", (t) => {
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const dir = directory(t);
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for (const name of ["main.log", "main.log.1"]) {
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const file = path.join(dir, name);
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// Sparse legacy file: reproduces a huge prior log without allocating it.
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const fd = fs.openSync(file, "w");
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fs.writeSync(fd, Buffer.from(`recent ${name}\n`), 0, Buffer.byteLength(`recent ${name}\n`), 200 * 1024 ** 3);
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fs.closeSync(fd);
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}
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let largestRead = 0;
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const filesystem = { ...fs, readSync: (...args: Parameters<typeof fs.readSync>) => {
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largestRead = Math.max(largestRead, (args[1] as Buffer).byteLength);
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return fs.readSync(...args);
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} };
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const logger = createDesktopLogger({ directory: () => dir, filesystem });
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logger.initialize();
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assert.ok(largestRead <= MAX_LOG_BYTES);
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assert.match(retained(dir, MAX_LOG_BYTES), /recent main.log\n$/);
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assert.match(fs.readFileSync(path.join(dir, "main.log.1"), "utf8"), /recent main.log.1\n$/);
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logger.log("after restart");
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createDesktopLogger({ directory: () => dir }).log("after second restart");
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assert.match(retained(dir, MAX_LOG_BYTES), /after second restart\n$/);
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});
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it("caps one oversized Unicode entry by bytes, retaining valid UTF-8 and its suffix", (t) => {
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const dir = directory(t);
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const logger = createDesktopLogger({ directory: () => dir, maxFileBytes: 256 });
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logger.log(`${"🙂".repeat(1000)}latest`);
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const text = retained(dir, 256);
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assert.match(text, /\[truncated\]/);
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assert.match(text, /latest\n$/);
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assert.ok(!text.includes("�"));
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});
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it("disables stdout permanently on asynchronous errors, with one file-only diagnostic", (t) => {
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const dir = directory(t);
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const stdout = new Output();
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const stderr = new Output();
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const logger = createDesktopLogger({ directory: () => dir, stdout, stderr });
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logger.log("before failure");
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const error = Object.assign(new Error("broken pipe"), { code: "EPIPE" });
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stdout.emit("error", error);
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stdout.emit("drain");
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stdout.emit("error", error);
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stderr.emit("error", error);
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stderr.emit("error", error);
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logger.log("after failure");
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assert.equal(stdout.writes, 1);
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const text = retained(dir, MAX_LOG_BYTES);
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assert.equal(text.match(/stdout disabled/g)?.length, 1);
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assert.equal(text.match(/stderr disabled/g)?.length, 1);
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assert.match(text, /after failure/);
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});
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it("handles synchronous write failures and bounds buffering under backpressure", (t) => {
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const dir = directory(t);
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const stdout = new Output();
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stdout.write = () => { stdout.writes++; throw Object.assign(new Error("closed"), { code: "EPIPE" }); };
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const logger = createDesktopLogger({ directory: () => dir, stdout });
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assert.doesNotThrow(() => { logger.log("first"); logger.log("second"); });
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assert.equal(stdout.writes, 1);
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const slow = new Output();
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slow.write = () => { slow.writes++; return false; };
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const slowLogger = createDesktopLogger({ directory: () => dir, stdout: slow });
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for (let i = 0; i < 100; i++) slowLogger.log(`slow ${i}`);
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assert.equal(slow.writes, 1);
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slow.emit("drain");
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slowLogger.log("drained");
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assert.equal(slow.writes, 2);
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});
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it("never propagates full-disk or rotation errors or mirrors file-only errors", (t) => {
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const dir = directory(t);
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const stdout = new Output();
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const logger = createDesktopLogger({ directory: () => dir, stdout, filesystem: {
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...fs, appendFileSync() { throw Object.assign(new Error("disk full"), { code: "ENOSPC" }); },
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} });
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assert.doesNotThrow(() => logger.log("uncaught: diagnostic", { fileOnly: true }));
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assert.equal(stdout.writes, 0);
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const file = path.join(dir, "main.log");
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fs.writeFileSync(file, "old\n".repeat(60));
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const blockedRotation = createDesktopLogger({ directory: () => dir, maxFileBytes: 256, filesystem: {
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...fs, renameSync() { throw new Error("rotation denied"); },
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} });
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assert.doesNotThrow(() => blockedRotation.log("new".repeat(100)));
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assert.equal(fs.statSync(file).size, 240, "a failed rotation must not append beyond the cap");
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});
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});
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describe("desktop shell logging integration", () => {
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it("records uncaught errors without touching stdout", (t) => {
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const dir = directory(t);
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const handlers = new Map<string, (error: Error) => void>();
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const stdout = new Output();
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const context = createContext({
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require: (id: string) => id === "electron" ? { app: { setName() {}, getPath: () => dir, requestSingleInstanceLock: () => false, quit() {} } } : mainRequire(id),
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process: { argv: [], env: {}, stdout, stderr: new Output(), on: (name: string, handler: (error: Error) => void) => handlers.set(name, handler) },
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__dirname: path.dirname(mainFile),
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});
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runInContext(fs.readFileSync(mainFile, "utf8"), context, { filename: mainFile });
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handlers.get("uncaughtException")!(new Error("original failure"));
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assert.equal(stdout.writes, 0);
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assert.match(retained(path.join(dir, "logs"), MAX_LOG_BYTES), /uncaught: Error: original failure/);
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});
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it("survives a real closed stdout pipe, records EPIPE once, and exits normally", async (t) => {
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const dir = directory(t);
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const source = `
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const fs = require('node:fs');
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const vm = require('node:vm');
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const mainFile = ${JSON.stringify(mainFile)};
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const mainRequire = require('node:module').createRequire(mainFile);
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const context = vm.createContext({
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require: id => id === 'electron' ? {app: {setName() {}, getPath: () => ${JSON.stringify(dir)}, requestSingleInstanceLock: () => false, quit() {}}} : mainRequire(id),
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process, console, __dirname: require('node:path').dirname(mainFile)
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});
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vm.runInContext(fs.readFileSync(mainFile, 'utf8'), context, {filename: mainFile});
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process.once('message', () => {
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vm.runInContext('log("trigger broken pipe")', context);
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setTimeout(() => {
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vm.runInContext('log("still alive after broken pipe")', context);
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process.disconnect();
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}, 100);
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});
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process.send('ready');
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`;
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const child = spawn(process.execPath, ["-e", source], { stdio: ["ignore", "pipe", "pipe", "ipc"] });
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t.after(() => { if (child.exitCode === null) child.kill("SIGKILL"); });
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const deadline = setTimeout(() => child.kill("SIGKILL"), 5000);
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t.after(() => clearTimeout(deadline));
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let stderr = "";
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child.stderr!.on("data", chunk => { stderr = (stderr + chunk).slice(-4000); });
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const exited = once(child, "exit");
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await Promise.race([once(child, "message"), exited.then(() => { throw new Error(`Fixture exited before ready: ${stderr}`); })]);
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child.stdout!.destroy();
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child.send("start");
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const [code, signal] = await exited;
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assert.equal(signal, null, stderr);
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assert.equal(code, 0, stderr);
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const text = retained(path.join(dir, "logs"), MAX_LOG_BYTES);
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assert.equal(text.match(/EPIPE/g)?.length, 1);
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assert.doesNotMatch(text, /uncaught:/);
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assert.match(text, /still alive after broken pipe/);
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assert.ok(Buffer.byteLength(text) < 1024, "a closed pipe must not produce a log flood");
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});
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});
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