[CSTPER-66] when a community or a collection is created or deleted, angular cache is refreshed so that in case of new community or collection it appears immediately in pages where communities and collections lists are displayed, in case of community or collection deletion deleted community or collection does not appear anymore in pages where communities and collections lists are displayed.

src/app/shared/comcol-forms/delete-comcol-page/delete-comcol-page.component.spec.ts

@@ -1,7 +1,7 @@
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { CommunityDataService } from '../../../core/data/community-data.service';
 import { ActivatedRoute, Router } from '@angular/router';
-import { TranslateModule } from '@ngx-translate/core';
+import {TranslateModule, TranslateService} from '@ngx-translate/core';
 import { of as observableOf } from 'rxjs';
 import { Community } from '../../../core/shared/community.model';
 import { SharedModule } from '../../shared.module';
@@ -13,6 +13,9 @@ import { DataService } from '../../../core/data/data.service';
 import { DeleteComColPageComponent } from './delete-comcol-page.component';
 import { NotificationsService } from '../../notifications/notifications.service';
 import { NotificationsServiceStub } from '../../testing/notifications-service.stub';
+import {RequestService} from '../../../core/data/request.service';
+import {getTestScheduler} from 'jasmine-marbles';
+import {createNoContentRemoteDataObject$, createSuccessfulRemoteDataObject$} from '../../remote-data.utils';
 
 describe('DeleteComColPageComponent', () => {
   let comp: DeleteComColPageComponent<DSpaceObject>;
@@ -22,9 +25,13 @@ describe('DeleteComColPageComponent', () => {
 
   let community;
   let newCommunity;
+  let parentCommunity;
   let routerStub;
   let routeStub;
   let notificationsService;
+  let translateServiceStub;
+  let requestServiceStub;
+
   const validUUID = 'valid-uuid';
   const invalidUUID = 'invalid-uuid';
   const frontendURL = '/testType';
@@ -45,10 +52,20 @@ describe('DeleteComColPageComponent', () => {
       }]
     });
 
+    parentCommunity = Object.assign(new Community(), {
+      uuid: 'a20da287-e174-466a-9926-f66as300d399',
+      id: 'a20da287-e174-466a-9926-f66as300d399',
+      metadata: [{
+        key: 'dc.title',
+        value: 'parent community'
+      }]
+    });
+
     dsoDataService = jasmine.createSpyObj(
       'dsoDataService',
       {
-        delete: observableOf({ isSuccessful: true })
+        delete: observableOf({ isSuccessful: true }),
+        findByHref: jasmine.createSpy('findByHref')
       });
 
     routerStub = {
@@ -59,6 +76,14 @@ describe('DeleteComColPageComponent', () => {
       data: observableOf(community)
     };
 
+    requestServiceStub = jasmine.createSpyObj('RequestService', {
+      removeByHrefSubstring: jasmine.createSpy('removeByHrefSubstring')
+    });
+
+    translateServiceStub = jasmine.createSpyObj('TranslateService', {
+      instant: jasmine.createSpy('instant')
+    });
+
   }
 
   beforeEach(async(() => {
@@ -70,6 +95,8 @@ describe('DeleteComColPageComponent', () => {
         { provide: Router, useValue: routerStub },
         { provide: ActivatedRoute, useValue: routeStub },
         { provide: NotificationsService, useValue: new NotificationsServiceStub() },
+        { provide: TranslateService, useValue: translateServiceStub},
+        { provide: RequestService, useValue: requestServiceStub}
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).compileComponents();
@@ -108,17 +135,21 @@ describe('DeleteComColPageComponent', () => {
     it('should show an error notification on failure', () => {
       (dsoDataService.delete as any).and.returnValue(observableOf({ isSuccessful: false }));
       spyOn(router, 'navigate');
+      spyOn((comp as any), 'refreshCache');
       comp.onConfirm(data2);
       fixture.detectChanges();
       expect(notificationsService.error).toHaveBeenCalled();
+      expect((comp as any).refreshCache).not.toHaveBeenCalled();
       expect(router.navigate).toHaveBeenCalled();
     });
 
     it('should show a success notification on success and navigate', () => {
       spyOn(router, 'navigate');
+      spyOn((comp as any), 'refreshCache');
       comp.onConfirm(data1);
       fixture.detectChanges();
       expect(notificationsService.success).toHaveBeenCalled();
+      expect((comp as any).refreshCache).toHaveBeenCalled();
       expect(router.navigate).toHaveBeenCalled();
     });
 
@@ -127,6 +158,78 @@ describe('DeleteComColPageComponent', () => {
       fixture.detectChanges();
       expect(dsoDataService.delete).toHaveBeenCalledWith(data1.id);
     });
+
+    describe('cache refresh', () => {
+      let scheduler;
+      let communityWithoutParentHref;
+      let deletedCommunity;
+
+      beforeEach(() => {
+        scheduler = getTestScheduler();
+
+      })
+      describe('cache refreshed top level community', () => {
+        beforeEach(() => {
+          (dsoDataService.findByHref as any).and.returnValue(createNoContentRemoteDataObject$());
+          deletedCommunity = {
+            dso: Object.assign(new Community(), {
+              metadata: [{
+                key: 'dc.title',
+                value: 'top level community'
+              }]
+            }),
+            _links: {
+              parentCommunity: {
+                href: 'topLevel/parentCommunity'
+              }
+            }
+          };
+          communityWithoutParentHref = {
+            dso: Object.assign(new Community(), {
+              metadata: [{
+                key: 'dc.title',
+                value: 'top level community'
+              }]
+            }),
+            _links: {}
+          };
+        });
+        it('top level community cache refreshed', () => {
+          scheduler.schedule(() => (comp as any).refreshCache(deletedCommunity));
+          scheduler.flush();
+          expect(requestServiceStub.removeByHrefSubstring).toHaveBeenCalledWith('communities/search/top');
+        });
+        it('top level community without parent link, cache not refreshed', () => {
+          scheduler.schedule(() => (comp as any).refreshCache(communityWithoutParentHref));
+          scheduler.flush();
+          expect(requestServiceStub.removeByHrefSubstring).not.toHaveBeenCalled();
+        });
+      });
+
+      describe('cache refreshed child community', () => {
+        beforeEach(() => {
+          (dsoDataService.findByHref as any).and.returnValue(createSuccessfulRemoteDataObject$(parentCommunity));
+          deletedCommunity = {
+            dso: Object.assign(new Community(), {
+              metadata: [{
+                key: 'dc.title',
+                value: 'child community'
+              }]
+            }),
+            _links: {
+              parentCommunity: {
+                href: 'child/parentCommunity'
+              }
+            }
+          };
+        });
+        it('child level community cache refreshed', () => {
+          scheduler.schedule(() => (comp as any).refreshCache(deletedCommunity));
+          scheduler.flush();
+          expect(requestServiceStub.removeByHrefSubstring).toHaveBeenCalledWith('a20da287-e174-466a-9926-f66as300d399');
+        });
+      });
+    });
   });
 
   describe('onCancel', () => {