OZG-7473 add test

Based on CR comment.

alfa-client/libs/tech-shared/src/lib/resource/list-resource.service.spec.ts

@@ -28,13 +28,13 @@ import { Resource, ResourceUri } from '@ngxp/rest';
 import { cold } from 'jest-marbles';
 import { DummyLinkRel, DummyListLinkRel } from 'libs/tech-shared/test/dummy';
 import { createDummyListResource, createDummyResource, createFilledDummyListResource } from 'libs/tech-shared/test/resource';
-import { BehaviorSubject, Observable, of } from 'rxjs';
+import { BehaviorSubject, Observable, of, throwError } from 'rxjs';
 import { multipleCold, singleCold, singleColdCompleted, singleHot } from '../../../test/marbles';
 import { ResourceListService } from './list-resource.service';
 import { CreateResourceData, LinkRelationName, ListItemResource, ListResourceServiceConfig } from './resource.model';
 import { ResourceRepository } from './resource.repository';
 import * as ResourceUtil from './resource.util';
-import { createEmptyStateResource, createErrorStateResource, createStateResource, ListResource, StateResource } from './resource.util';
+import { createEmptyStateResource, createErrorStateResource, createLoadingStateResource, createStateResource, ListResource, StateResource } from './resource.util';
 
 import { ProblemDetail } from '@alfa-client/tech-shared';
 import { expect } from '@jest/globals';
@@ -351,6 +351,26 @@ describe('ListResourceService', () => {
 
       expect(createdResource).toBeObservable(multipleCold(createEmptyStateResource(true), createStateResource(returnResource)));
     });
+
+    it('should handle error', () => {
+      const error: ProblemDetail = createProblemDetail();
+      service._handleError = jest.fn();
+      resourceRepository.createResource.mockReturnValue(throwError(() => error));
+
+      service.create(toCreate).subscribe();
+
+      expect(service._handleError).toHaveBeenCalledWith(error);
+    });
+
+    it('should emit on error', () => {
+      const error: ProblemDetail = createProblemDetail();
+      service._handleError = jest.fn().mockReturnValue(of(createErrorStateResource(error)));
+      resourceRepository.createResource.mockReturnValue(cold('-#', null, error));
+
+      expect(service.create(toCreate)).toBeObservable(
+        cold('a(b|)', { a: createLoadingStateResource(), b: createErrorStateResource(error) }),
+      );
+    });
   });
 
   describe('handle error', () => {