Add event manager test

ui/src/app/shared/service/event.service.spec.ts

@@ -0,0 +1,49 @@
+import { EventType } from 'src/app/app.constants'
+import { EventService } from './event.service'
+import { Event } from '../model/event.model'
+
+describe('EventService', () => {
+  let eventService: EventService
+
+  beforeEach(() => {
+    eventService = new EventService()
+  })
+
+  it('should be created', () => {
+    expect(eventService).toBeTruthy()
+  })
+
+  it('should broadcast events', () => {
+    const event: Event = {
+      type: EventType.LOG_IN_SUCCESS,
+      payload: 'Login successful',
+    }
+    let receivedEvent: Event | undefined
+
+    eventService.on(EventType.LOG_IN_SUCCESS).subscribe((e) => {
+      receivedEvent = e
+    })
+
+    eventService.broadcast(event)
+
+    expect(receivedEvent).toEqual(event)
+  })
+
+  it('should filter events by type', () => {
+    const event1: Event = { type: EventType.LOG_IN_SUCCESS, payload: 'data 1' }
+    const event2: Event = {
+      type: EventType.AFFILIATION_CREATED,
+      payload: 'data 2',
+    }
+    let receivedEvent: Event | undefined
+
+    eventService.on(EventType.LOG_IN_SUCCESS).subscribe((e) => {
+      receivedEvent = e
+    })
+
+    eventService.broadcast(event1)
+    eventService.broadcast(event2)
+
+    expect(receivedEvent).toEqual(event1)
+  })
+})