feat: runWithoutClosing for testing

Author: ColiZei

packages/nest-commander-testing/src/command-test.factory.ts

@@ -67,13 +67,22 @@ export class CommandTestFactory {
   }
 
   static async run(app: TestingModule, args: string[] = []) {
+    const application = await this.runApplication(app, args);
+    await application.close();
+  }
+
+  static async runWithoutClosing(app: TestingModule, args: string[] = []) {
+    return this.runApplication(app, args);
+  }
+
+  private static async runApplication(app: TestingModule, args: string[] = []) {
     if (args?.length && args[0] !== 'node') {
       args = ['node', randomBytes(8).toString('hex') + '.js'].concat(args);
     }
     await app.init();
     const runner = app.get(CommandRunnerService);
     await runner.run(args);
-    await app.close();
+    return app;
   }
 
   static setAnswers(value: any | any[]): void {