OZG-6301 OZG-6525 fix empty result list

alfa-client/libs/tech-shared/src/lib/pipe/to-embedded-resource.pipe.spec.ts

@@ -23,7 +23,7 @@
  */
 import { getEmbeddedResource } from '@ngxp/rest';
 import { DummyListLinkRel } from 'libs/tech-shared/test/dummy';
-import { createDummyListResource } from 'libs/tech-shared/test/resource';
+import { createDummyListResource, toResource } from 'libs/tech-shared/test/resource';
 import { ListResource } from '../resource/resource.util';
 import { EMPTY_ARRAY } from '../tech.util';
 import { ToEmbeddedResourcesPipe } from './to-embedded-resource.pipe';
@@ -55,5 +55,11 @@ describe('ToEmbeddedResourcesPipe', () => {
 
       expect(result).toBe(EMPTY_ARRAY);
     });
+
+    it('should return empty array non existing resources', () => {
+      const result: unknown[] = pipe.transform(toResource({}), DummyListLinkRel.LIST);
+
+      expect(result).toBe(EMPTY_ARRAY);
+    });
   });
 });

alfa-client/libs/tech-shared/src/lib/pipe/to-embedded-resource.pipe.ts

@@ -23,7 +23,7 @@
  */
 import { Pipe, PipeTransform } from '@angular/core';
 import { Resource, getEmbeddedResource } from '@ngxp/rest';
-import { isNil } from 'lodash-es';
+import { isNil, isNull } from 'lodash-es';
 import { LinkRelationName } from '../resource/resource.model';
 import { ListResource } from '../resource/resource.util';
 import { EMPTY_ARRAY } from '../tech.util';
@@ -32,6 +32,7 @@ import { EMPTY_ARRAY } from '../tech.util';
 export class ToEmbeddedResourcesPipe implements PipeTransform {
   transform(listResource: ListResource, linkRel: LinkRelationName): Resource[] {
     if (isNil(listResource) || isNil(linkRel)) return EMPTY_ARRAY;
-    return getEmbeddedResource(listResource, linkRel);
+    const embeddedReources: Resource[] = getEmbeddedResource(listResource, linkRel);
+    return isNull(embeddedReources) ? EMPTY_ARRAY : embeddedReources;
   }
 }