refactor(channels): dedupe transport and gateway test scaffolds

src/gateway/server.plugin-http-auth.test.ts

@@ -1,38 +1,8 @@
 import type { IncomingMessage, ServerResponse } from "node:http";
-import { mkdtemp, rm, writeFile } from "node:fs/promises";
-import os from "node:os";
-import path from "node:path";
 import { describe, expect, test, vi } from "vitest";
 import type { ResolvedGatewayAuth } from "./auth.js";
 import { createGatewayHttpServer } from "./server-http.js";
-
-async function withTempConfig(params: { cfg: unknown; run: () => Promise<void> }): Promise<void> {
-  const prevConfigPath = process.env.OPENCLAW_CONFIG_PATH;
-  const prevDisableCache = process.env.OPENCLAW_DISABLE_CONFIG_CACHE;
-
-  const dir = await mkdtemp(path.join(os.tmpdir(), "openclaw-plugin-http-auth-test-"));
-  const configPath = path.join(dir, "openclaw.json");
-
-  process.env.OPENCLAW_CONFIG_PATH = configPath;
-  process.env.OPENCLAW_DISABLE_CONFIG_CACHE = "1";
-
-  try {
-    await writeFile(configPath, JSON.stringify(params.cfg, null, 2), "utf-8");
-    await params.run();
-  } finally {
-    if (prevConfigPath === undefined) {
-      delete process.env.OPENCLAW_CONFIG_PATH;
-    } else {
-      process.env.OPENCLAW_CONFIG_PATH = prevConfigPath;
-    }
-    if (prevDisableCache === undefined) {
-      delete process.env.OPENCLAW_DISABLE_CONFIG_CACHE;
-    } else {
-      process.env.OPENCLAW_DISABLE_CONFIG_CACHE = prevDisableCache;
-    }
-    await rm(dir, { recursive: true, force: true });
-  }
-}
+import { withTempConfig } from "./test-temp-config.js";
 
 function createRequest(params: {
   path: string;
@@ -106,6 +76,7 @@ describe("gateway plugin HTTP auth boundary", () => {
 
     await withTempConfig({
       cfg: { gateway: { trustedProxies: [] } },
+      prefix: "openclaw-plugin-http-auth-test-",
       run: async () => {
         const handlePluginRequest = vi.fn(async (req: IncomingMessage, res: ServerResponse) => {
           const pathname = new URL(req.url ?? "/", "http://localhost").pathname;