import fs from "node:fs";import http from "node:http";import os from "node:os";import path from "node:path"; import { afterEach, describe, expect, it } from "vitest";import { tryHandleProjectFaviconRequest } from "./projectFaviconRoute"; interface HttpResponse {  statusCode: number;  contentType: string | null;  body: string;} const tempDirs: string[] = []; function makeTempDir(prefix: string): string {  const dir = fs.mkdtempSync(path.join(os.tmpdir(), prefix));  tempDirs.push(dir);  return dir;} async function withRouteServer(run: (baseUrl: string) => Promise<void>): Promise<void> {  const server = http.createServer((req, res) => {    const url = new URL(req.url ?? "/", "http://127.0.0.1");    if (tryHandleProjectFaviconRequest(url, res)) {      return;    }    res.writeHead(404, { "Content-Type": "text/plain" });    res.end("Not Found");  });   await new Promise<void>((resolve, reject) => {    server.listen(0, "127.0.0.1", (error?: Error) => {      if (error) {        reject(error);        return;      }      resolve();    });  });   const address = server.address();  if (typeof address !== "object" || address === null) {    throw new Error("Expected server address to be an object");  }  const baseUrl = `http://127.0.0.1:${address.port}`;   try {    await run(baseUrl);  } finally {    await new Promise<void>((resolve, reject) => {      server.close((error?: Error) => {        if (error) {          reject(error);          return;        }        resolve();      });    });  }} async function request(baseUrl: string, pathname: string): Promise<HttpResponse> {  const response = await fetch(`${baseUrl}${pathname}`);  return {    statusCode: response.status,    contentType: response.headers.get("content-type"),    body: await response.text(),  };} describe("tryHandleProjectFaviconRequest", () => {  afterEach(() => {    for (const dir of tempDirs.splice(0, tempDirs.length)) {      fs.rmSync(dir, { recursive: true, force: true });    }  });   it("returns 400 when cwd is missing", async () => {    await withRouteServer(async (baseUrl) => {      const response = await request(baseUrl, "/api/project-favicon");      expect(response.statusCode).toBe(400);      expect(response.body).toBe("Missing cwd parameter");    });  });   it("serves a well-known favicon file from the project root", async () => {    const projectDir = makeTempDir("t3code-favicon-route-root-");    fs.writeFileSync(path.join(projectDir, "favicon.svg"), "<svg>favicon</svg>", "utf8");     await withRouteServer(async (baseUrl) => {      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;      const response = await request(baseUrl, pathname);      expect(response.statusCode).toBe(200);      expect(response.contentType).toContain("image/svg+xml");      expect(response.body).toBe("<svg>favicon</svg>");    });  });   it("resolves icon href from source files when no well-known favicon exists", async () => {    const projectDir = makeTempDir("t3code-favicon-route-source-");    const iconPath = path.join(projectDir, "public", "brand", "logo.svg");    fs.mkdirSync(path.dirname(iconPath), { recursive: true });    fs.writeFileSync(      path.join(projectDir, "index.html"),      '<link rel="icon" href="/brand/logo.svg">',    );    fs.writeFileSync(iconPath, "<svg>brand</svg>", "utf8");     await withRouteServer(async (baseUrl) => {      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;      const response = await request(baseUrl, pathname);      expect(response.statusCode).toBe(200);      expect(response.contentType).toContain("image/svg+xml");      expect(response.body).toBe("<svg>brand</svg>");    });  });   it("resolves icon link when href appears before rel in HTML", async () => {    const projectDir = makeTempDir("t3code-favicon-route-html-order-");    const iconPath = path.join(projectDir, "public", "brand", "logo.svg");    fs.mkdirSync(path.dirname(iconPath), { recursive: true });    fs.writeFileSync(      path.join(projectDir, "index.html"),      '<link href="/brand/logo.svg" rel="icon">',    );    fs.writeFileSync(iconPath, "<svg>brand-html-order</svg>", "utf8");     await withRouteServer(async (baseUrl) => {      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;      const response = await request(baseUrl, pathname);      expect(response.statusCode).toBe(200);      expect(response.contentType).toContain("image/svg+xml");      expect(response.body).toBe("<svg>brand-html-order</svg>");    });  });   it("resolves object-style icon metadata when href appears before rel", async () => {    const projectDir = makeTempDir("t3code-favicon-route-obj-order-");    const iconPath = path.join(projectDir, "public", "brand", "obj.svg");    fs.mkdirSync(path.dirname(iconPath), { recursive: true });    fs.mkdirSync(path.join(projectDir, "src"), { recursive: true });    fs.writeFileSync(      path.join(projectDir, "src", "root.tsx"),      'const links = [{ href: "/brand/obj.svg", rel: "icon" }];',      "utf8",    );    fs.writeFileSync(iconPath, "<svg>brand-obj-order</svg>", "utf8");     await withRouteServer(async (baseUrl) => {      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;      const response = await request(baseUrl, pathname);      expect(response.statusCode).toBe(200);      expect(response.contentType).toContain("image/svg+xml");      expect(response.body).toBe("<svg>brand-obj-order</svg>");    });  });   it("serves a fallback favicon when no icon exists", async () => {    const projectDir = makeTempDir("t3code-favicon-route-fallback-");     await withRouteServer(async (baseUrl) => {      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;      const response = await request(baseUrl, pathname);      expect(response.statusCode).toBe(200);      expect(response.contentType).toContain("image/svg+xml");      expect(response.body).toContain('data-fallback="project-favicon"');    });  });});