prepare tests for ng-12 upgrade (#7099)

* prepare tests for ng12 upgrade

* fix lint

* fix tests

* test fixes

* fix code and tests

* fix code and tests

* test fixes

* test fixes

lib/core/form/components/widgets/radio-buttons/radio-buttons.widget.spec.ts

@@ -129,7 +129,7 @@ describe('RadioButtonsWidgetComponent', () => {
     });
 
     it('should update the field value when an option is selected', () => {
-        spyOn(widget, 'onFieldChanged').and.returnValue(of({}));
+        spyOn(widget, 'onFieldChanged').and.stub();
         widget.onOptionClick('fake-opt');
 
         expect(widget.field.value).toEqual('fake-opt');

lib/core/form/components/widgets/upload/upload.widget.spec.ts

@@ -28,8 +28,9 @@ import { UploadWidgetComponent } from './upload.widget';
 import { setupTestBed } from '../../../../testing/setup-test-bed';
 import { CoreTestingModule } from '../../../../testing/core.testing.module';
 import { TranslateModule } from '@ngx-translate/core';
+import { RelatedContentRepresentation } from '@alfresco/js-api';
 
-const fakePngAnswer = {
+const fakePngAnswer = new RelatedContentRepresentation({
     'id': 1155,
     'name': 'a_png_file.png',
     'created': '2017-07-25T17:17:37.099Z',
@@ -41,7 +42,7 @@ const fakePngAnswer = {
     'simpleType': 'image',
     'previewStatus': 'queued',
     'thumbnailStatus': 'queued'
-};
+});
 
 const fakeJpgAnswer = {
     'id': 1156,
@@ -211,7 +212,7 @@ describe('UploadWidgetComponent', () => {
                     return of(fakeJpgAnswer);
                 }
 
-                return of();
+                return of(null);
             });
 
             uploadWidgetComponent.field.params.multiple = true;
@@ -241,7 +242,7 @@ describe('UploadWidgetComponent', () => {
                     return of(fakeJpgAnswer);
                 }
 
-                return of();
+                return of(null);
             });
 
             uploadWidgetComponent.field.params.multiple = true;

lib/core/form/services/form.service.spec.ts

@@ -233,7 +233,7 @@ describe('Form service', () => {
                 activiti: {
                     processApi: processApiSpy
                 }
-            });
+            } as any);
             processApiSpy.getProcessDefinitionStartForm.and.returnValue(Promise.resolve({ id: '1' }));
 
             service.getStartFormDefinition('myprocess:1').subscribe(() => {