Improve unit tests

Current unit tests would not fail even if we wouldn't use optional flag when injecting the token. We should properly
test case when not having any value injected or the ICONS_PATH token.

Author: lukasmatta

projects/cps-ui-kit/src/lib/components/cps-icon/cps-icon.component.spec.ts

@@ -14,8 +14,7 @@ describe('CpsIconComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [CommonModule, CpsIconComponent],
-      providers: [{ provide: ICONS_PATH, useValue: 'test-assets' }]
+      imports: [CommonModule, CpsIconComponent]
     }).compileComponents();
   });
 
@@ -25,17 +24,17 @@ describe('CpsIconComponent', () => {
   });
 
   describe('Test assets path injection', () => {
-    it('should use injected ICONS_PATH value', () => {
+    it('should use default path when no ICONS_PATH is provided', () => {
       createComponent();
-      expect(component.url).toBe('test-assets');
+      expect(component.url).toBe('assets/');
     });
 
-    it('should default to "assets/" if no ICONS_PATH is provided', () => {
+    it('should use injected ICONS_PATH value', () => {
       TestBed.overrideProvider(ICONS_PATH, {
-        useValue: null
+        useValue: 'test-assets/'
       });
       createComponent();
-      expect(component.url).toBe('assets/');
+      expect(component.url).toBe('test-assets/');
     });
   });
 });