[CST-7757] Refactoring code

src/app/shared/dso-page/dso-page-subscription-button/dso-page-subscription-button.component.spec.ts

@@ -1,14 +1,53 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { DsoPageSubscriptionButtonComponent } from './dso-page-subscription-button.component';
+import { AuthorizationDataService } from '../../../core/data/feature-authorization/authorization-data.service';
+import { of as observableOf } from 'rxjs';
+import { NgbModalModule } from '@ng-bootstrap/ng-bootstrap';
+import { By } from '@angular/platform-browser';
+import { DebugElement } from '@angular/core';
+import { Item } from '../../../core/shared/item.model';
+import { ITEM } from '../../../core/shared/item.resource-type';
+import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
+import { TranslateLoaderMock } from '../../mocks/translate-loader.mock';
 
 describe('DsoPageSubscriptionButtonComponent', () => {
   let component: DsoPageSubscriptionButtonComponent;
   let fixture: ComponentFixture<DsoPageSubscriptionButtonComponent>;
+  let de: DebugElement;
+
+  const authorizationService = jasmine.createSpyObj('authorizationService', {
+    isAuthorized: jasmine.createSpy('isAuthorized') // observableOf(true)
+  });
+
+  const mockItem = Object.assign(new Item(), {
+    id: 'fake-id',
+    uuid: 'fake-id',
+    handle: 'fake/handle',
+    lastModified: '2018',
+    type: ITEM,
+    _links: {
+      self: {
+        href: 'https://localhost:8000/items/fake-id'
+      }
+    }
+  });
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      declarations: [ DsoPageSubscriptionButtonComponent ]
+      imports: [
+        NgbModalModule,
+        TranslateModule.forRoot({
+          loader: {
+            provide: TranslateLoader,
+            useClass: TranslateLoaderMock
+          }
+        })
+      ],
+      declarations: [ DsoPageSubscriptionButtonComponent ],
+      providers: [
+        { provide: AuthorizationDataService, useValue: authorizationService },
+      ]
     })
     .compileComponents();
   });
@@ -16,10 +55,29 @@ describe('DsoPageSubscriptionButtonComponent', () => {
   beforeEach(() => {
     fixture = TestBed.createComponent(DsoPageSubscriptionButtonComponent);
     component = fixture.componentInstance;
-    fixture.detectChanges();
+    de = fixture.debugElement;
+    component.dso = mockItem;
   });
 
-  it('should create', () => {
-    expect(component).toBeTruthy();
+  describe('when is authorized', () => {
+    beforeEach(() => {
+      authorizationService.isAuthorized.and.returnValue(observableOf(true))
+      fixture.detectChanges();
+    });
+
+    it('should display subscription button', () => {
+      expect(de.query(By.css(' [data-test="subscription-button"]'))).toBeTruthy();
+    });
+  });
+
+  describe('when is not authorized', () => {
+    beforeEach(() => {
+      authorizationService.isAuthorized.and.returnValue(observableOf(false))
+      fixture.detectChanges();
+    });
+
+    it('should not display subscription button', () => {
+      expect(de.query(By.css(' [data-test="subscription-button"]'))).toBeNull();
+    });
   });
 });