fix: show deprecation warning for incorrect usage of Node.js API (#3563)

Author: snitin315

lib/Server.js

@@ -3,6 +3,7 @@
 const os = require("os");
 const path = require("path");
 const url = require("url");
+const util = require("util");
 const fs = require("graceful-fs");
 const ipaddr = require("ipaddr.js");
 const internalIp = require("internal-ip");
@@ -18,7 +19,16 @@ if (!process.env.WEBPACK_SERVE) {
 class Server {
   constructor(options = {}, compiler) {
     // TODO: remove this after plugin support is published
+
     if (options.hooks) {
+      const showDeprecationWarning = util.deprecate(
+        () => {},
+        "Using 'compiler' as the first argument is deprecated. Please use 'options' as the first argument and 'compiler' as the second argument.",
+        "DEP_WEBPACK_DEV_SERVER_API"
+      );
+
+      showDeprecationWarning();
+
       [options, compiler] = [compiler, options];
     }
 

test/server/Server.test.js

@@ -91,10 +91,17 @@ describe("Server", () => {
     });
 
     // TODO: remove this after plugin support is published
-    it("should create and run server with old parameters order", (done) => {
+    it("should create and run server with old parameters order and log deprecation warning", (done) => {
       const compiler = webpack(config);
+      const util = require("util");
+      const utilSpy = jest.spyOn(util, "deprecate");
+
       const server = new Server(compiler, baseDevConfig);
 
+      expect(utilSpy.mock.calls[0][1]).toBe(
+        "Using 'compiler' as the first argument is deprecated. Please use 'options' as the first argument and 'compiler' as the second argument."
+      );
+
       compiler.hooks.done.tap("webpack-dev-server", () => {
         expect(entries).toMatchSnapshot("oldparam");
 
@@ -108,6 +115,8 @@ describe("Server", () => {
 
         getEntries(server);
       });
+
+      utilSpy.mockRestore();
     });
   });
 
@@ -772,7 +781,7 @@ describe("Server", () => {
         port: "9999",
       };
 
-      server = new Server(compiler, options);
+      server = new Server(options, compiler);
 
       const warnSpy = jest.fn();
 

test/server/__snapshots__/Server.test.js.snap.webpack4

@@ -36,7 +36,7 @@ Array [
 ]
 `;
 
-exports[`Server DevServerPlugin should create and run server with old parameters order: oldparam 1`] = `
+exports[`Server DevServerPlugin should create and run server with old parameters order and log deprecation warning: oldparam 1`] = `
 Array [
   Array [
     "client",

test/server/__snapshots__/Server.test.js.snap.webpack5

@@ -36,7 +36,7 @@ Array [
 ]
 `;
 
-exports[`Server DevServerPlugin should create and run server with old parameters order: oldparam 1`] = `
+exports[`Server DevServerPlugin should create and run server with old parameters order and log deprecation warning: oldparam 1`] = `
 Array [
   Array [
     "client",