feat(eventemitter): add clear method to EventEmitter

add clear method to EventEmitter which enables deleting events and all its subscribed callbacks

src/EventEmitter.ts

@@ -42,10 +42,21 @@ export class EventEmitter {
   /**
    * @param {string} eventName
    * @param {Array<any>} args
+   * @returns void
    */
   emit(eventName: string, ...args: Array<any>): void {
     this.subscriptions
       .get(eventName)
       .forEach(({ callback }) => callback(...args));
   }
+  /**
+   *
+   * @param eventName eventName to be deleted
+   * @returns void
+   */
+  clear(eventName: string): void {
+    this.subscriptions = new Subscriptions(
+      [...this.subscriptions].filter(([key]) => key !== eventName)
+    );
+  }
 }

test/index.spec.ts

@@ -82,4 +82,19 @@ describe('eventEmitter', () => {
     expect(testCallbackB).toHaveBeenCalled();
     expect(testCallbackB).toHaveBeenCalledWith(mockEventArgs);
   });
+
+  it('should not call callbacks after an event has been deleted', () => {
+    const testCallbackA = jest.fn();
+    const testCallbackB = jest.fn();
+
+    const eventEmitter = new EventEmitter();
+    eventEmitter.subscribe('test-event', testCallbackA);
+    eventEmitter.subscribe('test-event', testCallbackB);
+
+    eventEmitter.clear('test-event');
+    eventEmitter.emit('test-event');
+
+    expect(testCallbackA).not.toHaveBeenCalled();
+    expect(testCallbackB).not.toHaveBeenCalled();
+  });
 });