feat: replace jest with vitest

- replace jest with vitest
- replace jest.config.js with vitest.config.js
- reuse setup file
- remove jest-related dependencies

Author: hereje

jest.config.js

@@ -4,15 +4,17 @@ Simple round robin load balancer for websockets
 pnpm test ./simple-balancer-with-websockets.test.ts
 */
 
+import fetch from "node-fetch";
+import { once } from "node:events";
 import * as http from "node:http";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
 import * as httpProxy from "../..";
 import getPort from "../get-port";
-import { once } from "node:events";
-import fetch from "node-fetch";
 
 describe("A simple round-robin load balancer that supports websockets", () => {
   let addresses: Array<{ host: string, port: number }>;
-  it("lists the servers to use in our rotation.", async () => {
+  beforeAll(async () => {
+    // lists the servers to use in our rotation.
     addresses = [
       {
         host: "localhost",
@@ -121,7 +123,8 @@ describe("A simple round-robin load balancer that supports websockets", () => {
     ]);
   });
 
-  it("cleans up", () => {
+  afterAll(async() => {
+    // cleans up
     Object.values(servers).map((x: any) => x?.close());
   });
 });

lib/test/balancer/simple-balancer-with-websockets.test.ts

@@ -8,10 +8,12 @@ import * as http from "node:http";
 import * as httpProxy from "../..";
 import getPort from "../get-port";
 import fetch from "node-fetch";
+import { describe, it, expect, afterAll, beforeAll } from "vitest";
 
 describe("A simple round-robin load balancing strategy.", () => {
   let addresses: Array<{ host: string, port: number }>;
-  it("lists the servers to use in our rotation.", async () => {
+  beforeAll(async () => {
+    // lists the servers to use in our rotation.
     addresses = [
       {
         host: "localhost",
@@ -72,7 +74,8 @@ describe("A simple round-robin load balancing strategy.", () => {
     ]);
   });
 
-  it("cleans up", () => {
+  afterAll(async () => {
+    // cleans up
     Object.values(servers).map((x: any) => x?.close());
   });
 });

lib/test/balancer/simple-balancer.test.ts

@@ -11,6 +11,7 @@ import * as httpProxy from "../..";
 import log from "../log";
 import getPort from "../get-port";
 import fetch from "node-fetch";
+import { describe, it, expect, afterAll, beforeAll } from "vitest";
 
 export async function server() {
   const httpPort = await getPort();
@@ -20,9 +21,9 @@ export async function server() {
     res.writeHead(200, { "Content-Type": "text/plain" });
     res.write(
       "request successfully proxied to: " +
-        req.url +
-        "\n" +
-        JSON.stringify(req.headers, undefined, 2),
+      req.url +
+      "\n" +
+      JSON.stringify(req.headers, undefined, 2),
     );
     res.end();
   });
@@ -61,7 +62,8 @@ describe("tests proxying a basic http server", () => {
 
 describe("Load test against the basic proxy", () => {
   let x: { proxy: httpProxy.ProxyServer; target: http.Server; httpPort: number; proxyPort: number };
-  it("creates servers", async () => {
+  beforeAll(async () => {
+    // creates servers
     x = await server();
   });
 
@@ -108,7 +110,8 @@ describe("Load test against the basic proxy", () => {
     expect(elapsed).toBeLessThan(MAX_TIME);
   });
 
-  it("Cleans up", () => {
+  afterAll(async () => {
+    // Cleans up
     x.proxy.close();
     x.target.close();
   });

lib/test/http/basic-proxy.test.ts

@@ -8,6 +8,7 @@ import * as httpProxy from "../..";
 import * as http from "node:http";
 import getPort from "../get-port";
 import fetch from "node-fetch";
+import {describe, it, expect} from 'vitest';
 
 const CUSTOM_ERROR =
   "Something went wrong. And we are reporting a custom error message.";

lib/test/http/custom-proxy-error.test.ts

@@ -2,6 +2,7 @@ import express from "express";
 import getPort from "../get-port";
 import ProxyServer, { createServer } from "../..";
 import http from "node:http";
+import {describe, it, expect} from 'vitest';
 
 // See https://github.com/sagemathinc/http-proxy-3/issues/6
 

lib/test/http/double-slashes.test.ts

@@ -7,6 +7,7 @@ import * as http from "node:http";
 import getPort from "../get-port";
 import log from "../log";
 import fetch from "node-fetch";
+import {describe, it, expect} from 'vitest';
 
 const CUSTOM_ERROR = "There was an error proxying your request";
 

lib/test/http/error-handling.test.ts

@@ -13,6 +13,7 @@ import log from "../log";
 import getPort from "../get-port";
 import wait from "../wait";
 import fetch from "node-fetch";
+import {describe, it, expect} from 'vitest';
 
 describe("Example of proxying over HTTP with additional forward proxy to a different server", () => {
   let ports: Record<'target' | 'forward' | 'proxy', number>;

lib/test/http/forward-and-target-proxy.test.ts

@@ -15,22 +15,24 @@ import log from "../log";
 import getPort from "../get-port";
 import wait from "../wait";
 import fetch from "node-fetch";
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
 
 describe("Example of proxying over HTTP with additional forward proxy", () => {
   let forwardingServer: http.Server,
     httpPort: number,
     numRequests = 0;
-  it("Setup Target Http Forwarding Server", async () => {
+  beforeAll(async () => {
+    // Setup Target Http Forwarding Server
     httpPort = await getPort();
     forwardingServer = http.createServer((req, res) => {
       log("Receiving forward for: " + req.url);
       numRequests += 1;
       res.writeHead(200, { "Content-Type": "text/plain" });
       res.write(
         "request successfully forwarded to: " +
-          req.url +
-          "\n" +
-          JSON.stringify(req.headers, undefined, 2),
+        req.url +
+        "\n" +
+        JSON.stringify(req.headers, undefined, 2),
       );
       res.end();
     });
@@ -91,7 +93,8 @@ describe("Example of proxying over HTTP with additional forward proxy", () => {
     expect(numRequests).toBe(before + 2);
   });
 
-  it("Cleans up", () => {
+  afterAll(async () => {
+    // Cleans up
     forwardingServer.close();
     proxyServer.close();
     proxy2Server.close();

lib/test/http/forward-proxy.test.ts

@@ -5,6 +5,7 @@ pnpm test latent-proxy.test.ts
 import * as http from "node:http";
 import * as httpProxy from "../..";
 import getPort from "../get-port";
+import {describe, it, expect} from 'vitest';
 
 describe("Test proxying over HTTP with latency", () => {
   let ports: Record<'http' | 'proxy', number>;