OZG-6129 improve test

alfa-client/libs/design-system/src/lib/instant-search/instant-search/instant-search.component.spec.ts

@@ -146,11 +146,12 @@ describe('InstantSearchComponent', () => {
   });
 
   describe('handleArrowNavigation', () => {
+    const event: KeyboardEvent = new KeyboardEvent('arrow');
+
     beforeEach(() => {
-      component.setFocusOnResultItem = jest.fn();
       component.getResultIndexForKey = jest.fn();
+      component.setFocusOnResultItem = jest.fn();
     });
-    const event: KeyboardEvent = new KeyboardEvent('arrow');
 
     it('should call prevent default', () => {
       event.preventDefault = jest.fn();
@@ -160,13 +161,13 @@ describe('InstantSearchComponent', () => {
       expect(event.preventDefault).toHaveBeenCalled();
     });
 
-    it('should call getResultIndexForKey with key of event', () => {
+    it('should call getResultIndexForKey', () => {
       component.handleArrowNavigation(event);
 
       expect(component.getResultIndexForKey).toHaveBeenCalledWith(event.key);
     });
 
-    it('should call setFocusOnResultItem new index', () => {
+    it('should call setFocusOnResultItem', () => {
       component.getResultIndexForKey = jest.fn().mockReturnValue(0);
 
       component.handleArrowNavigation(event);
@@ -422,20 +423,12 @@ describe('InstantSearchComponent', () => {
   });
 
   describe('isArrowNavigationKey', () => {
-    it('should return true if key is ArrowDown', () => {
-      const arrowDownEvent = { ...new KeyboardEvent('key'), key: 'ArrowDown' };
+    it.each(['ArrowUp', 'ArrowDown'])('should return true for key %s', (key: string) => {
+      const keyboardEvent: KeyboardEvent = { ...new KeyboardEvent('key'), key };
 
-      const result: boolean = component.isArrowNavigationKey(arrowDownEvent);
+      const result: boolean = component.isArrowNavigationKey(keyboardEvent);
 
-      expect(result).toBe(true);
-    });
-
-    it('should return true if key is ArrowUp', () => {
-      const arrowUpEvent = { ...new KeyboardEvent('navigation'), key: 'ArrowUp' };
-
-      const result: boolean = component.isArrowNavigationKey(arrowUpEvent);
-
-      expect(result).toBe(true);
+      expect(result).toBeTruthy();
     });
 
     it('should return false', () => {