test : just complete

tests/public-performance.test.ts

@@ -1,13 +1,16 @@
 import { readFile } from "node:fs/promises";
 
-import { describe, expect, it, vi } from "vitest";
+import { afterAll, describe, expect, it } from "vitest";
 
-vi.hoisted(() => {
-  vi.stubEnv("BASE_URL", "https://guide.example.test");
+const originalBaseUrl = process.env.BASE_URL;
+process.env.BASE_URL = "https://guide.example.test";
+const { default: robots } = await import("@/app/robots");
+
+afterAll(() => {
+  if (originalBaseUrl === undefined) delete process.env.BASE_URL;
+  else process.env.BASE_URL = originalBaseUrl;
 });
 
-import robots from "@/app/robots";
-
 async function repositoryFile(path: string): Promise<string> {
   return readFile(new URL(`../${path}`, import.meta.url), "utf8");
 }