Fix test by destroying fixture after test

src/app/test-controller/components/unithost/unithost.component.spec.ts

@@ -72,6 +72,10 @@ describe('UnithostComponent', () => {
     fixture.detectChanges();
   });
 
+  afterEach(() => {
+    fixture.destroy();
+  });
+
   it('should create', () => {
     expect(component).toBeTruthy();
   });