add test for closing connection on emitting closure events

test/notifications/senders/AppleNotificationSenderTests.test.ts

@@ -5,29 +5,36 @@ import {
   AppleNotificationSender,
   NotificationAlertArguments
 } from "../../../src/notifications/senders/AppleNotificationSender";
+import { ClientHttp2Session } from "node:http2";
 
 jest.mock("http2");
 
 const sampleKeyBase64 = "LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCk1JR1RBZ0VBTUJNR0J5cUdTTTQ5QWdFR0NDcUdTTTQ5QXdFSEJIa3dkd0lCQVFRZ3NybVNBWklhZ09mQ1A4c0IKV2kyQ0JYRzFPbzd2MWJpc3BJWkN3SXI0UkRlZ0NnWUlLb1pJemowREFRZWhSQU5DQUFUWkh4VjJ3UUpMTUJxKwp5YSt5ZkdpM2cyWlV2NmhyZmUrajA4eXRla1BIalhTMHF6Sm9WRUx6S0hhNkVMOVlBb1pEWEJ0QjZoK2ZHaFhlClNPY09OYmFmCi0tLS0tRU5EIFBSSVZBVEUgS0VZLS0tLS0K";
 
-function mockHttp2Connect(status: number) {
-  class MockClient extends EventEmitter {
-    request = jest.fn((_) => {
-      const mockRequest: any = new EventEmitter();
-      mockRequest.setEncoding = jest.fn();
-      mockRequest.write = jest.fn();
-      mockRequest.end = jest.fn(() => {
-        setTimeout(() => {
-          mockRequest.emit('response', { ':status': status });
-        }, 10);
-      });
-      return mockRequest;
-    });
-
-    close() {};
+class MockClient extends EventEmitter {
+  constructor(
+    private status: number,
+  ) {
+    super()
   }
 
-  (http2.connect as jest.Mock) = jest.fn(() => new MockClient());
+  request = jest.fn((_) => {
+    const mockRequest: any = new EventEmitter();
+    mockRequest.setEncoding = jest.fn();
+    mockRequest.write = jest.fn();
+    mockRequest.end = jest.fn(() => {
+      setTimeout(() => {
+        mockRequest.emit('response', { ':status': this.status });
+      }, 10);
+    });
+    return mockRequest;
+  });
+
+  close = jest.fn(() => {});
+}
+
+function mockHttp2Connect(status: number) {
+  (http2.connect as jest.Mock) = jest.fn(() => new MockClient(status));
 }
 
 describe("AppleNotificationSender", () => {
@@ -159,5 +166,25 @@ describe("AppleNotificationSender", () => {
       expect(http2.connect).not.toHaveBeenCalled();
       expect(result).toBe(true);
     });
+
+    it("registers a handler to close the connection if `close` event fired", async () => {
+      const connectionCloseEvents = ['close', 'goaway', 'error'];
+
+      await Promise.all(connectionCloseEvents.map(async (event) => {
+        const mockClient = new MockClient(200);
+        notificationSender = new AppleNotificationSender(true, mockClient as unknown as ClientHttp2Session);
+
+        const notificationArguments: NotificationAlertArguments = {
+          title: 'Test notification',
+          body: ''
+        };
+
+        const result = await notificationSender.sendNotificationImmediately('1', notificationArguments);
+
+        mockClient.emit(event);
+
+        expect(mockClient.close).toHaveBeenCalled();
+      }));
+    });
   });
 });