Fix handle error listener

Author: jorisadri

src/infrastructure/Listener.ts

@@ -107,6 +107,7 @@ export class Listener {
                 this.webSocket.onerror = (err) => {
                     console.log('WebSocket Error ');
                     console.log(err);
+                    reject(err);
                 };
                 this.webSocket.onmessage = (msg) => {
                     const message = JSON.parse(msg.data as string);

test/infrastructure/Listener.spec.ts

@@ -31,4 +31,17 @@ describe('Listener', () => {
             listener.close();
         });
     });
+
+    describe('onerror', () => {
+        it('should reject because of wrong server url', async () => {
+            const listener = new Listener('https://notcorrecturl:0000');
+            await listener.open()
+                .then((result) => {
+                    throw new Error('This should not be called when expecting error');
+                })
+                .catch((error) => {
+                    expect(error.toString()).to.be.equal("Error: getaddrinfo ENOTFOUND notcorrecturl notcorrecturl:0000");
+                })
+        });
+    });
 });