implement primitive tests

npm/ng-packs/packages/core/src/lib/tests/local-storage.service.spec.ts

@@ -13,4 +13,40 @@ describe('LocalStorageService', () => {
   it('should be created', () => {
     expect(service).toBeTruthy();
   });
+
+  it('should be called getItem', () => {
+    const spy = jest.spyOn(service, 'getItem');
+    service.getItem('test');
+    expect(spy).toHaveBeenCalled();
+  });
+
+  it('should be called setItem', () => {
+    const spy = jest.spyOn(service, 'setItem');
+    service.setItem('test', 'value');
+    expect(spy).toHaveBeenCalled();
+  });
+
+  it('should be called removeItem', () => {
+    const spy = jest.spyOn(service, 'removeItem');
+    service.removeItem('test');
+    expect(spy).toHaveBeenCalled();
+  });
+
+  it('should be called clear', () => {
+    const spy = jest.spyOn(service, 'clear');
+    service.clear();
+    expect(spy).toHaveBeenCalled();
+  });
+
+  it('should be called key', () => {
+    const spy = jest.spyOn(service, 'key');
+    service.key(0);
+    expect(spy).toHaveBeenCalled();
+  });
+
+  it('should be called length', () => {
+    const spy = jest.spyOn(service, 'length', 'get');
+    service.length;
+    expect(spy).toHaveBeenCalled();
+  });
 });