Polish test and its comments

Author: mpalourdio

src/test/components/ng-http-loader.component.spec.ts

@@ -511,19 +511,17 @@ describe('NgHttpLoaderComponent', () => {
             tick(1000);
             expect(component.isSpinnerVisible).toBeTruthy();
 
-            // the first HTTP request is finally over, the spinner is still visible
+            // the first HTTP request is finally over, the spinner is still visible for at least 1 second
             firstRequest.flush({});
             tick();
             expect(component.isSpinnerVisible).toBeTruthy();
 
-            // 200 ms happen after the first HTTP request has finished, a second HTTP request is launched
+            // But 200 ms after the first HTTP request has finished, a second HTTP request is launched
             tick(200);
-            expect(component.isSpinnerVisible).toBeTruthy();
-
             runQuery('/fake2').subscribe();
             const secondRequest = httpMock.expectOne('/fake2');
 
-            // After 900ms, the second http request ends. The spinner should still be visible
+            // After 700ms, the second http request ends. The spinner is still visible
             tick(700);
             secondRequest.flush({});
             expect(component.isSpinnerVisible).toBeTruthy();