OZG-5769 null safe check

alfa-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-bescheiden/vorgang-detail-bescheiden-result/vorgang-detail-bescheiden-result-nachricht/vorgang-detail-bescheiden-result-nachricht.component.spec.ts

@@ -128,5 +128,14 @@ describe('VorgangDetailBescheidenResultNachrichtComponent', () => {
 
       expect(formService.patchNachricht).not.toHaveBeenCalled();
     });
+
+    it.each([null, undefined])(
+      'should not patch form if document resource is %s',
+      (resource: DocumentResource) => {
+        component.bescheidDocumentStateResource = createStateResource(resource);
+
+        expect(formService.patchNachricht).not.toHaveBeenCalled();
+      },
+    );
   });
 });

alfa-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-bescheiden/vorgang-detail-bescheiden-result/vorgang-detail-bescheiden-result-nachricht/vorgang-detail-bescheiden-result-nachricht.component.ts

 import { BescheidService, DocumentResource } from '@alfa-client/bescheid-shared';
-import { StateResource } from '@alfa-client/tech-shared';
+import { StateResource, isNotNil } from '@alfa-client/tech-shared';
 import { Component, Input, OnInit } from '@angular/core';
 import { FormGroup } from '@angular/forms';
 import { Observable } from 'rxjs';
@@ -11,7 +11,7 @@ import { BescheidenFormService } from '../../bescheiden.formservice';
 })
 export class VorgangDetailBescheidenResultNachrichtComponent implements OnInit {
   @Input() set bescheidDocumentStateResource(stateResource: StateResource<DocumentResource>) {
-    if (!stateResource.loading && !stateResource.error) {
+    if (!stateResource.loading && !stateResource.error && isNotNil(stateResource.resource)) {
       this.formService.patchNachricht(stateResource.resource);
     }
   }