add event manager tests

Author: fadi-george

__mocks__/react-native.ts

@@ -1,5 +1,28 @@
 import { vi } from 'vitest';
 
+export const createEmitterSubscriptionMock = (
+  eventName: string,
+  callback: (payload: unknown) => void,
+) => ({
+  remove: vi.fn(),
+  emitter: {
+    addListener: vi.fn(),
+    removeAllListeners: vi.fn(),
+    listenerCount: vi.fn(() => 1),
+    emit: vi.fn(),
+  },
+  listener: () => callback,
+  context: undefined,
+  eventType: eventName,
+  key: 0,
+  subscriber: {
+    addSubscription: vi.fn(),
+    removeSubscription: vi.fn(),
+    removeAllSubscriptions: vi.fn(),
+    getSubscriptionsForType: vi.fn(),
+  },
+});
+
 const mockRNOneSignal = {
   initialize: vi.fn(),
   login: vi.fn(),
@@ -79,10 +102,8 @@ export { mockPlatform, mockRNOneSignal };
 export class NativeEventEmitter {
   constructor(_nativeModule: typeof mockRNOneSignal) {}
 
-  addListener(_eventName: string, _callback: (payload: unknown) => void) {
-    return {
-      remove: vi.fn(),
-    };
+  addListener(eventName: string, callback: (payload: unknown) => void) {
+    return createEmitterSubscriptionMock(eventName, callback);
   }
 
   removeListener(_eventName: string, _callback: (payload: unknown) => void) {

src/OSNotification.ts

@@ -42,6 +42,8 @@ interface iOSNotificationData extends BaseNotificationData {
   interruptionLevel?: string;
 }
 
+export type OSNotificationData = AndroidNotificationData | iOSNotificationData;
+
 export default class OSNotification {
   body: string;
   sound?: string;
@@ -78,7 +80,7 @@ export default class OSNotification {
   relevanceScore?: number;
   interruptionLevel?: string;
 
-  constructor(receivedEvent: AndroidNotificationData | iOSNotificationData) {
+  constructor(receivedEvent: OSNotificationData) {
     this.body = receivedEvent.body;
     this.sound = receivedEvent.sound;
     this.title = receivedEvent.title;