Local file storage (#5763)

Co-authored-by: Tom Moor <tom.moor@gmail.com>

server/test/TestServer.ts

@@ -0,0 +1,84 @@
+import http from "http";
+import { AddressInfo } from "net";
+import Koa from "koa";
+// eslint-disable-next-line no-restricted-imports
+import nodeFetch from "node-fetch";
+
+class TestServer {
+  private server: http.Server;
+  private listener?: Promise<void> | null;
+
+  constructor(app: Koa) {
+    this.server = http.createServer(app.callback() as any);
+  }
+
+  get address(): string {
+    const { port } = this.server.address() as AddressInfo;
+    return `http://localhost:${port}`;
+  }
+
+  listen() {
+    if (!this.listener) {
+      this.listener = new Promise((resolve, reject) => {
+        this.server
+          .listen(0, () => resolve())
+          .on("error", (err) => reject(err));
+      });
+    }
+
+    return this.listener;
+  }
+
+  fetch(path: string, opts: any) {
+    return this.listen().then(() => {
+      const url = `${this.address}${path}`;
+      const options = Object.assign({ headers: {} }, opts);
+      const contentType =
+        options.headers["Content-Type"] ?? options.headers["content-type"];
+      // automatic JSON encoding
+      if (!contentType && typeof options.body === "object") {
+        options.headers["Content-Type"] = "application/json";
+        options.body = JSON.stringify(options.body);
+      }
+
+      return nodeFetch(url, options);
+    });
+  }
+
+  close() {
+    this.listener = null;
+    return new Promise<void>((resolve, reject) => {
+      this.server.close((err) => (err ? reject(err) : resolve()));
+    });
+  }
+
+  delete(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "DELETE" });
+  }
+
+  get(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "GET" });
+  }
+
+  head(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "HEAD" });
+  }
+
+  options(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "OPTIONS" });
+  }
+
+  patch(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "PATCH" });
+  }
+
+  post(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "POST" });
+  }
+
+  put(path: string, options?: any) {
+    return this.fetch(path, { ...options, method: "PUT" });
+  }
+}
+
+export default TestServer;