more tests things

test-js/src/send-single-message.js

@@ -0,0 +1,14 @@
+import { connect } from 'amqplib';
+
+const connection = await connect('amqp://localhost');
+
+const channel = await connection.createChannel();
+
+channel.publish('exchange-1', 'queue-1', Buffer.from('hello'));
+
+console.log('Published message');
+
+await channel.close();
+await connection.close();
+
+console.log('Successfully shut down connection');