import fs from "node:fs";import os from "node:os";import path from "node:path"; import { RotatingFileSink } from "@t3tools/shared/logging";import { afterEach, describe, expect, it } from "vitest"; const tempRoots: string[] = []; function makeTempDir(): string {  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "t3-rotating-log-"));  tempRoots.push(dir);  return dir;} afterEach(() => {  for (const dir of tempRoots.splice(0)) {    fs.rmSync(dir, { recursive: true, force: true });  }}); describe("RotatingFileSink", () => {  it("rotates when writes exceed max bytes", () => {    const dir = makeTempDir();    const logPath = path.join(dir, "desktop-main.log");    const sink = new RotatingFileSink({      filePath: logPath,      maxBytes: 10,      maxFiles: 3,    });     sink.write("12345");    sink.write("67890");    sink.write("abc");     expect(fs.readFileSync(path.join(dir, "desktop-main.log"), "utf8")).toBe("abc");    expect(fs.readFileSync(path.join(dir, "desktop-main.log.1"), "utf8")).toBe("1234567890");  });   it("retains only maxFiles backups", () => {    const dir = makeTempDir();    const logPath = path.join(dir, "server-child.log");    const sink = new RotatingFileSink({      filePath: logPath,      maxBytes: 4,      maxFiles: 2,    });     sink.write("aaaa");    sink.write("bbbb");    sink.write("cccc");    sink.write("dddd");     expect(fs.existsSync(path.join(dir, "server-child.log.1"))).toBe(true);    expect(fs.existsSync(path.join(dir, "server-child.log.2"))).toBe(true);    expect(fs.existsSync(path.join(dir, "server-child.log.3"))).toBe(false);  });   it("prunes stale backups above maxFiles on startup", () => {    const dir = makeTempDir();    const logPath = path.join(dir, "desktop-main.log");    fs.writeFileSync(path.join(dir, "desktop-main.log.1"), "first");    fs.writeFileSync(path.join(dir, "desktop-main.log.4"), "stale");     const sink = new RotatingFileSink({      filePath: logPath,      maxBytes: 16,      maxFiles: 2,    });    sink.write("hello");     expect(fs.existsSync(path.join(dir, "desktop-main.log.4"))).toBe(false);  });});