[ADF-2137] Document Thumbnail Pane (#2943)

* pdf thumbnails

* update TestBed declarations

* add PdfViewerService to TestBed

* content projection

* update TestBed declaration

* update TestBed

* update TestBed

* docs

* pristine

* added doc component image

* use global PDFJS instance fro tests

lib/core/viewer/components/pdfViewer-thumb.component.spec.ts

@@ -0,0 +1,62 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { DomSanitizer } from '@angular/platform-browser';
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { PdfThumbComponent } from './pdfViewer-thumb.component';
+
+describe('PdfThumbComponent', () => {
+
+    let fixture: ComponentFixture<PdfThumbComponent>;
+    let component: PdfThumbComponent;
+    const domSanitizer = {
+        bypassSecurityTrustUrl: () => 'image-data'
+    };
+    const page = {
+        id: 'pageId',
+        getPage: jasmine.createSpy('getPage').and.returnValue(Promise.resolve({
+            getViewport: () => ({ height: 0, width: 0 }),
+            render: jasmine.createSpy('render').and.returnValue(Promise.resolve())
+        }))
+    };
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            declarations: [
+                PdfThumbComponent
+            ],
+            providers: [
+                { provide: DomSanitizer, useValue: domSanitizer }
+            ]
+        }).compileComponents()
+            .then(() => {
+                fixture = TestBed.createComponent(PdfThumbComponent);
+                component = fixture.componentInstance;
+            });
+    }));
+
+    it('should have resolve image data', (done) => {
+        component.page = page;
+        fixture.detectChanges();
+
+        component.image$.then((result) => {
+            expect(result).toBe('image-data');
+            done();
+        });
+    });
+
+});