Tests: replace express with basic Node server

Closes gh-5531

eslint.config.js

@@ -205,7 +205,15 @@ module.exports = [
 		},
 		rules: {
 			...jqueryConfig.rules,
-			"no-implicit-globals": "error"
+			"no-implicit-globals": "error",
+			"no-unused-vars": [
+				"error",
+				{
+					args: "after-used",
+					argsIgnorePattern: "^_",
+					caughtErrorsIgnorePattern: "^_"
+				}
+			]
 		}
 	},
 
@@ -271,7 +279,7 @@ module.exports = [
 			"test/node_smoke_tests/**",
 			"test/bundler_smoke_tests/**/*",
 			"test/promises_aplus_adapters/**",
-			"test/middleware-mockserver.js"
+			"test/middleware-mockserver.cjs"
 		],
 		languageOptions: {
 			ecmaVersion: "latest",

package.json

@@ -61,35 +61,33 @@
   "license": "MIT",
   "devDependencies": {
     "@babel/cli": "7.24.8",
-    "@babel/core": "7.24.9",
+    "@babel/core": "7.25.2",
     "@babel/plugin-transform-for-of": "7.24.7",
     "@prantlf/jsonlint": "14.0.3",
     "@types/selenium-webdriver": "4.1.24",
-    "body-parser": "1.20.2",
+    "archiver": "7.0.1",
     "bootstrap": "5.3.3",
     "browserstack-local": "1.5.5",
     "chalk": "5.3.0",
     "colors": "1.4.0",
     "commitplease": "3.2.0",
     "concurrently": "8.2.2",
-    "core-js-bundle": "3.37.1",
+    "core-js-bundle": "3.38.0",
     "cross-env": "7.0.3",
     "diff": "5.2.0",
-    "eslint": "9.4.0",
+    "eslint": "9.8.0",
     "eslint-config-jquery": "3.0.2",
     "exit-hook": "4.0.0",
-    "express": "4.19.2",
-    "express-body-parser-error-handler": "1.0.7",
-    "globals": "15.8.0",
-    "husky": "9.1.1",
+    "globals": "15.9.0",
+    "husky": "9.1.4",
     "jsdom": "24.1.1",
-    "marked": "13.0.2",
+    "marked": "14.0.0",
     "native-promise-only": "0.8.1",
     "nodemon": "3.1.4",
     "promises-aplus-tests": "2.1.2",
     "q": "1.5.1",
     "qunit": "2.21.1",
-    "raw-body": "2.5.2",
+    "raw-body": "3.0.0",
     "release-it": "17.6.0",
     "requirejs": "2.3.7",
     "rimraf": "6.0.1",

test/data/mock.php

@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Keep in sync with /test/middleware-mockserver.js
+ * Keep in sync with /test/middleware-mockserver.cjs
  */
 function cleanCallback( $callback ) {
 	return preg_replace( '/[^a-z0-9_]/i', '', $callback );

test/middleware-mockserver.cjs

@@ -165,16 +165,7 @@ const mocks = {
 			"constructor": "prototype collision (constructor)"
 		};
 
-		// Use resp.append in express to
-		// avoid overwriting List-Header
-		if ( resp.append ) {
-
-			for ( const key in headers ) {
-				resp.append( key, headers[ key ] );
-			}
-		} else {
 		resp.writeHead( 200, headers );
-		}
 		req.query.keys.split( "|" ).forEach( function( key ) {
 			if ( key.toLowerCase() in req.headers ) {
 				resp.write( `${ key }: ${ req.headers[ key.toLowerCase() ] }\n` );
@@ -305,11 +296,7 @@ const handlers = {
 
 /**
  * Connect-compatible middleware factory for mocking server responses.
- * Used by Ajax unit tests when run via Karma.
- *
- * Despite Karma using Express, it uses Connect to deal with custom middleware,
- * which passes the raw Node Request and Response objects instead of the
- * Express versions of these (e.g. no req.path, req.query, resp.set).
+ * Used by Ajax tests run in Node.
  */
 function MockserverMiddlewareFactory() {
 

test/runner/createTestServer.js

@@ -1,70 +1,192 @@
-import bodyParser from "body-parser";
-import express from "express";
-import bodyParserErrorHandler from "express-body-parser-error-handler";
-import { readFile } from "node:fs/promises";
-import mockServer from "../middleware-mockserver.js";
+import http from "node:http";
+import { readFile, stat } from "node:fs/promises";
+import { createReadStream } from "node:fs";
+import mockServer from "../middleware-mockserver.cjs";
+import getRawBody from "raw-body";
 
-export async function createTestServer( report ) {
-	const nameHTML = await readFile( "./test/data/name.html", "utf8" );
+export async function createTestServer( report, { quiet } = {} ) {
 	const indexHTML = await readFile( "./test/index.html", "utf8" );
-	const app = express();
+
+	// Support connect-style middleware
+	const middlewares = [];
+	function use( middleware ) {
+		middlewares.push( middleware );
+	}
+
+	function run( req, res ) {
+		let i = 0;
+
+		// Log responses unless quiet is set
+		if ( !quiet ) {
+			const originalEnd = res.end;
+			res.end = function( ...args ) {
+				console.log( `${ req.method } ${ req.url } ${ this.statusCode }` );
+				originalEnd.call( this, ...args );
+			};
+		}
+
+		// Add a parsed URL object to the request object
+		req.parsedUrl = new URL(
+			`http://${ process.env.HOST ?? "localhost" }${ req.url }`
+		);
+
+		// Add a simplified redirect helper to the response object
+		res.redirect = ( status, location ) => {
+			if ( !location ) {
+				location = status;
+				status = 303;
+			}
+
+			res.writeHead( status, { Location: location } );
+			res.end();
+		};
+
+		const next = () => {
+			const middleware = middlewares[ i++ ];
+			if ( middleware ) {
+				try {
+					middleware( req, res, next );
+				} catch ( error ) {
+					console.error( error );
+					res.writeHead( 500, { "Content-Type": "application/json" } );
+					res.end( "Internal Server Error" );
+				}
+			} else {
+				res.writeHead( 404 );
+				res.end();
+			}
+		};
+
+		next();
+	}
 
 	// Redirect home to test page
-	app.get( "/", ( _req, res ) => {
+	use( ( req, res, next ) => {
+		if ( req.parsedUrl.pathname === "/" ) {
 			res.redirect( "/test/" );
+		} else {
+			next();
+		}
 	} );
 
 	// Redirect to trailing slash
-	app.use( ( req, res, next ) => {
-		if ( req.path === "/test" ) {
-			const query = req.url.slice( req.path.length );
-			res.redirect( 301, `${ req.path }/${ query }` );
+	use( ( req, res, next ) => {
+		if ( req.parsedUrl.pathname === "/test" ) {
+			res.redirect( 308, `${ req.parsedUrl.pathname }/${ req.parsedUrl.search }` );
 		} else {
 			next();
 		}
 	} );
 
 	// Add a script tag to the index.html to load the QUnit listeners
-	app.use( /\/test(?:\/index.html)?\//, ( _req, res ) => {
-		res.send(
+	use( ( req, res, next ) => {
+		if (
+			( req.method === "GET" || req.method === "HEAD" ) &&
+			( req.parsedUrl.pathname === "/test/" ||
+				req.parsedUrl.pathname === "/test/index.html" )
+		) {
+			res.writeHead( 200, { "Content-Type": "text/html" } );
+			res.end(
 				indexHTML.replace(
 					"</head>",
 					"<script src=\"/test/runner/listeners.js\"></script></head>"
 				)
 			);
+		} else {
+			next();
+		}
 	} );
 
 	// Bind the reporter
-	app.post(
-		"/api/report",
-		bodyParser.json( { limit: "50mb" } ),
-		async( req, res ) => {
-			if ( report ) {
-				const response = await report( req.body );
-				if ( response ) {
-					res.json( response );
+	use( async( req, res, next ) => {
+		if ( req.url !== "/api/report" || req.method !== "POST" ) {
+			return next();
+		}
+		let body;
+		try {
+			body = JSON.parse( await getRawBody( req ) );
+		} catch ( error ) {
+			if ( error.code === "ECONNABORTED" ) {
 				return;
 			}
+			console.error( error );
+			res.writeHead( 400, { "Content-Type": "application/json" } );
+			res.end( JSON.stringify( { error: "Invalid JSON" } ) );
+			return;
 		}
-			res.sendStatus( 204 );
+		const response = await report( body );
+		if ( response ) {
+			res.writeHead( 200, { "Content-Type": "application/json" } );
+			res.end( JSON.stringify( response ) );
+		} else {
+			res.writeHead( 204 );
+			res.end();
 		}
-	);
-
-	// Handle errors from the body parser
-	app.use( bodyParserErrorHandler() );
-
-	// Hook up mock server
-	app.use( mockServer() );
-
-	// Serve static files
-	app.post( "/test/data/name.html", ( _req, res ) => {
-		res.send( nameHTML );
 	} );
 
-	app.use( "/dist", express.static( "dist" ) );
-	app.use( "/src", express.static( "src" ) );
-	app.use( "/test", express.static( "test" ) );
-	app.use( "/external", express.static( "external" ) );
+	// Hook up mock server
+	use( mockServer() );
 
-	return app;
+	// Serve static files
+	const validMimeTypes = {
+
+		// No .mjs or .cjs files are used in tests
+		".js": "application/javascript",
+		".css": "text/css",
+		".html": "text/html",
+		".xml": "application/xml",
+		".xhtml": "application/xhtml+xml",
+		".jpg": "image/jpeg",
+		".png": "image/png",
+		".svg": "image/svg+xml",
+		".ico": "image/x-icon",
+		".map": "application/json",
+		".txt": "text/plain",
+		".log": "text/plain"
+	};
+	use( async( req, res, next ) => {
+		if (
+			!req.url.startsWith( "/dist/" ) &&
+			!req.url.startsWith( "/src/" ) &&
+			!req.url.startsWith( "/test/" ) &&
+			!req.url.startsWith( "/external/" )
+		) {
+			return next();
+		}
+		const file = req.parsedUrl.pathname.slice( 1 );
+		const ext = file.slice( file.lastIndexOf( "." ) );
+
+		// Allow POST to .html files in tests
+		if (
+			req.method !== "GET" &&
+			req.method !== "HEAD" &&
+			( ext !== ".html" || req.method !== "POST" )
+		) {
+			return next();
+		}
+		const mimeType = validMimeTypes[ ext ];
+		if ( mimeType ) {
+			try {
+				await stat( file );
+			} catch ( _ ) {
+				res.writeHead( 404 );
+				res.end();
+				return;
+			}
+			res.writeHead( 200, { "Content-Type": mimeType } );
+			createReadStream( file )
+				.pipe( res )
+				.on( "error", ( error ) => {
+					console.error( error );
+					res.writeHead( 500 );
+					res.end();
+				} );
+		} else {
+			console.error( `Invalid file extension: ${ ext }` );
+			res.writeHead( 404 );
+			res.end();
+		}
+	} );
+
+	return http.createServer( run );
 }

test/runner/run.js

@@ -137,7 +137,9 @@ export async function run( {
 			default:
 				console.warn( "Received unknown message type:", message.type );
 		}
-	} );
+
+	// Hide test server request logs in CLI output
+	}, { quiet: true } );
 
 	// Start up local test server
 	let server;