Update 07-directives-deep-dive/01-starting-project/src/app/directives/log.directive.spec.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: aimxnaim

07-directives-deep-dive/01-starting-project/src/app/directives/log.directive.spec.ts

@@ -1,8 +1,10 @@
+import { ElementRef } from '@angular/core';
 import { LogDirective } from './log.directive';
 
 describe('LogDirective', () => {
   it('should create an instance', () => {
-    const directive = new LogDirective();
+    const mockElementRef: ElementRef = { nativeElement: document.createElement('div') };
+    const directive = new LogDirective(mockElementRef);
     expect(directive).toBeTruthy();
   });
 });