chore(ci): add local HTTP server for Karma tests; (#7022)

bin/run-karma-tests.js

@@ -0,0 +1,46 @@
+import { startTestServer, stopHTTPServer } from '../test/helpers/server.js';
+import { spawn } from 'child_process';
+import chalk from "chalk";
+
+let server;
+
+async function run() {
+
+  console.log(chalk.red.bold(`[ Starting HTTP server... ]`));
+
+  server = await startTestServer(3000);
+
+  await new Promise((resolve, reject) => {
+    console.log('Starting karma runner...');
+
+    const karma = spawn(
+      'npx',
+      ['karma', 'start', 'karma.conf.cjs', '--single-run'],
+      {
+        stdio: 'inherit',
+        shell: true,
+        env: { ...process.env, LISTEN_ADDR: '0.0.0.0' },
+      });
+
+    karma.on('exit', (code) => {
+      code ? reject(new Error(`Karma tests failed with exit code ${code}`)) : resolve();
+    });
+  });
+
+}
+
+
+
+(async() => {
+  try {
+    await run();
+  } finally {
+    if (server) {
+      console.log(chalk.red.bold(`[ Terminating HTTP server... ]`));
+
+      await stopHTTPServer(server);
+    }
+  }
+})();
+
+