Build before serving app

Author: brizental

benchmarks/compat/tests/utils.js

@@ -18,20 +18,36 @@ const PORT = 3000;
 
 export class App {
   constructor() {
-    const compiler = webpack({
+    this.compiler = webpack({
       mode: "development",
-      entry: path.join(__dirname, "../index.js")
+      entry: path.join(__dirname, "../index.js"),
+      output: {
+        path: path.join(__dirname, "../dist"),
+        filename: "index.js",
+      }
     });
 
     this.server = new DevServer({
       static: {
         directory: path.join(__dirname, "../"),
       },
       port: 3000,
-    }, compiler);
+    }, this.compiler);
+  }
+
+  async build() {
+    await new Promise((resolve, reject) => {
+      this.compiler.run(err => {
+        if (err) reject(err);
+        resolve();
+
+        this.compiler.close(closeErr => reject(closeErr));
+      });
+    });
   }
 
   async start() {
+    await this.build();
     console.log("Starting server...");
     await this.server.start();
   }