Add pokemon link unit tests.

Author: dimeloper

src/app/components/banner-grid/banner-grid.component.spec.ts

@@ -1,5 +1,5 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { RouterTestingModule } from '@angular/router/testing';
 import { BannerGridComponent } from './banner-grid.component';
 
 describe('BannerGridComponent', () => {
@@ -8,7 +8,7 @@ describe('BannerGridComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [BannerGridComponent],
+      imports: [BannerGridComponent, RouterTestingModule],
     }).compileComponents();
 
     fixture = TestBed.createComponent(BannerGridComponent);
@@ -19,4 +19,26 @@ describe('BannerGridComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  describe('getPokemonLink', () => {
+    it('should return correct URL format with lowercase pokemon name', () => {
+      const pokemon = { title: 'Charizard' };
+      expect(component.getPokemonLink(pokemon)).toBe(
+        '/pokemon-optimized/charizard'
+      );
+    });
+
+    it('should work with different pokemon names', () => {
+      const testCases = [
+        { input: 'Blastoise', expected: '/pokemon-optimized/blastoise' },
+        { input: 'Venusaur', expected: '/pokemon-optimized/venusaur' },
+        { input: 'PIKACHU', expected: '/pokemon-optimized/pikachu' },
+      ];
+
+      testCases.forEach(test => {
+        const pokemon = { title: test.input };
+        expect(component.getPokemonLink(pokemon)).toBe(test.expected);
+      });
+    });
+  });
 });