[SI-1447] unit test added

Signed-off-by: Peter Buschmann <peter.buschmann@pta.de>
diff --git a/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.spec.ts b/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.spec.ts
index 09dac39..1e354b8 100644
--- a/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.spec.ts
+++ b/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.spec.ts
@@ -57,6 +57,13 @@
     expect(service).toBeTruthy();
   });
 
+  it('should loadStations via init()', () => {
+    const spy = spyOn(service as any, 'loadGridFailureStations');
+    service.gridFailureStations$ = of([new FailureStation()]);
+    service.init();
+    expect(spy).toHaveBeenCalled();
+  });
+
   it('should dispatch loadGridFailure Action via loadGridFailure(id)', () => {
     service.loadGridFailure('id');
     expect(appState.dispatch).toHaveBeenCalledWith(gridFailureActions.loadGridFailureDetail({ payload: 'id' }));