adding test file

npm/ng-packs/packages/core/src/lib/tests/internet-connection.service.spec.ts

@@ -0,0 +1,28 @@
+import { TestBed } from '@angular/core/testing';
+
+import { InternetConnectionService } from '../services/internet-connection-service';
+
+describe('InternetConnectionService', () => {
+  let service: InternetConnectionService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(InternetConnectionService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('#networkStatus should return real value (true | false)', () => {
+    expect(typeof service.networkStatus()).toEqual('boolean')
+    expect(typeof !service.networkStatus()).toEqual('boolean')
+  });
+
+  it('#networkStatus$ should return real value (true | false)', () => {
+    service.networkStatus$.subscribe(val=>{
+      expect(typeof val).toEqual('boolean')
+      expect(typeof !val).toEqual('boolean')
+    })
+  });
+});