feat: create notify method in event dispatcher

src/domain/event/@shared/event-dispatcher.spec.ts

@@ -1,4 +1,5 @@
 import { SendEmailWhenProductIsCreatedHandler } from '../product/handler/send-email-when-product-Is-created-handler'
+import { ProductCreatedEvent } from '../product/product-created-event'
 import { EventDispatcher } from './event-dispatcher'
 
 describe('Domain events tests', () => {
@@ -31,4 +32,22 @@ describe('Domain events tests', () => {
     eventDispatcher.unregisterAll()
     expect(eventDispatcher.getEventHandlers.ProductCreatedEvent).toBeUndefined()
   })
+
+  it('should notify all event handlers', () => {
+    const eventDispatcher = new EventDispatcher()
+    const eventHandler = new SendEmailWhenProductIsCreatedHandler()
+    const spyEventHandler = jest.spyOn(eventHandler, 'handler')
+    eventDispatcher.register('ProductCreatedEvent', eventHandler)
+    expect(eventDispatcher.getEventHandlers.ProductCreatedEvent[0]).toMatchObject(eventHandler)
+
+    const productCratedEvent = new ProductCreatedEvent({
+      name: 'product 1',
+      description: 'product 1 description',
+      price: 10.0
+    })
+
+    // quando o notify for chamado o SendEmailWhenProductIsCreatedHandler.handler() deve ser chamado
+    eventDispatcher.notify(productCratedEvent)
+    expect(spyEventHandler).toHaveBeenCalled()
+  })
 })

src/domain/event/@shared/event-dispatcher.ts

@@ -29,5 +29,12 @@ export class EventDispatcher implements EventDispatcherInterface {
     this.eventHandlers = {}
   }
 
-  notify: (event: EventInterface) => void
+  notify (event: EventInterface): void {
+    const eventName = event.constructor.name
+    if (this.eventHandlers[eventName]) {
+      this.eventHandlers[eventName].forEach((eventHandler) => {
+        eventHandler.handler(event)
+      })
+    }
+  }
 }