added HalEndpointService spec

src/app/core/data/item-data.service.spec.ts

@@ -0,0 +1,94 @@
+import { Store } from '@ngrx/store';
+import { cold, getTestScheduler } from 'jasmine-marbles';
+import { TestScheduler } from 'rxjs/Rx';
+import { GlobalConfig } from '../../../config/global-config.interface';
+import { BrowseService } from '../browse/browse.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { ResponseCacheService } from '../cache/response-cache.service';
+import { CoreState } from '../core.reducers';
+import { ItemDataService } from './item-data.service';
+import { RequestService } from './request.service';
+
+describe('ItemDataService', () => {
+  let scheduler: TestScheduler;
+  let service: ItemDataService;
+  let bs: BrowseService;
+
+  const requestService = {} as RequestService;
+  const responseCache = {} as ResponseCacheService;
+  const rdbService = {} as RemoteDataBuildService;
+  const store = {} as Store<CoreState>;
+  const EnvConfig = {} as GlobalConfig;
+
+  const scopeID = '4af28e99-6a9c-4036-a199-e1b587046d39';
+  const browsesEndpoint = 'https://rest.api/discover/browses';
+  const itemBrowseEndpoint = `${browsesEndpoint}/author/items`;
+  const scopedEndpoint = `${itemBrowseEndpoint}?scope=${scopeID}`;
+  const serviceEndpoint = `https://rest.api/core/items`;
+  const browseError = new Error('getBrowseURL failed');
+
+  function initMockBrowseService(isSuccessful: boolean) {
+    const obs = isSuccessful ?
+      cold('--a-', { a: itemBrowseEndpoint }) :
+      cold('--#-', undefined, browseError);
+    return jasmine.createSpyObj('bs', {
+      getBrowseURLFor: obs
+    });
+  }
+
+  function initTestService() {
+    return new ItemDataService(
+      responseCache,
+      requestService,
+      rdbService,
+      store,
+      EnvConfig,
+      bs
+    );
+  }
+
+  describe('getScopedEndpoint', () => {
+    beforeEach(() => {
+      scheduler = getTestScheduler();
+    });
+
+    it('should return the endpoint to fetch Items within the given scope', () => {
+      bs = initMockBrowseService(true);
+      service = initTestService();
+
+      const result = service.getScopedEndpoint(scopeID);
+      const expected = cold('--b-', { b: scopedEndpoint });
+
+      expect(result).toBeObservable(expected);
+    });
+
+    describe('if the dc.date.issue browse isn\'t configured for items', () => {
+      beforeEach(() => {
+        bs = initMockBrowseService(false);
+        service = initTestService();
+      });
+      it('should throw an error', () => {
+        const result = service.getScopedEndpoint(scopeID);
+        const expected = cold('--#-', undefined, browseError);
+
+        expect(result).toBeObservable(expected);
+      });
+    });
+
+    describe('if the scope is not specified', () => {
+      beforeEach(() => {
+        bs = initMockBrowseService(true);
+        service = initTestService();
+        spyOn(service, 'getEndpoint').and.returnValue(cold('--b-', { b: serviceEndpoint }))
+      });
+
+      it('should return this.getEndpoint()', () => {
+        const result = service.getScopedEndpoint(undefined);
+        const expected = cold('--c-', { c: serviceEndpoint });
+
+        expect(result).toBeObservable(expected);
+      });
+    });
+
+  });
+});

src/app/core/data/item-data.service.ts

@@ -1,18 +1,19 @@
 import { Inject, Injectable } from '@angular/core';
 
 import { Store } from '@ngrx/store';
-
+import { Observable } from 'rxjs/Observable';
-import { DataService } from './data.service';
+import { GLOBAL_CONFIG, GlobalConfig } from '../../../config';
-import { Item } from '../shared/item.model';
+import { isEmpty, isNotEmpty } from '../../shared/empty.util';
+import { BrowseService } from '../browse/browse.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { NormalizedItem } from '../cache/models/normalized-item.model';
 import { ResponseCacheService } from '../cache/response-cache.service';
 import { CoreState } from '../core.reducers';
-import { NormalizedItem } from '../cache/models/normalized-item.model';
+import { Item } from '../shared/item.model';
+import { URLCombiner } from '../url-combiner/url-combiner';
+
+import { DataService } from './data.service';
 import { RequestService } from './request.service';
-import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
-import { GLOBAL_CONFIG, GlobalConfig } from '../../../config';
-import { Observable } from 'rxjs/Observable';
-import { BrowseService } from '../browse/browse.service';
-import { isNotEmpty } from '../../shared/empty.util';
 
 @Injectable()
 export class ItemDataService extends DataService<NormalizedItem, Item> {
@@ -30,9 +31,13 @@ export class ItemDataService extends DataService<NormalizedItem, Item> {
   }
 
   public getScopedEndpoint(scopeID: string): Observable<string> {
-    return this.bs.getBrowseURLFor('dc.date.issued', this.linkName)
+    if (isEmpty(scopeID)) {
-      .filter((href) => isNotEmpty(href))
+      return this.getEndpoint();
-      .distinctUntilChanged();
+    } else {
+      return this.bs.getBrowseURLFor('dc.date.issued', this.linkName)
+        .filter((href: string) => isNotEmpty(href))
+        .distinctUntilChanged();
+    }
   }
 
 }