Change device/folder getAll to getEach

src/app/charts/chart/chart.component.spec.ts

@@ -4,7 +4,7 @@ import { ChartComponent } from './chart.component';
 import { HttpClientModule } from '@angular/common/http';
 
 class MockService {
-  getAll() {
+  getEach() {
     // unimplemented
   }
 };

src/app/charts/chart/chart.component.ts

@@ -72,7 +72,7 @@ export class ChartComponent implements OnInit {
 
   ngAfterViewInit() {
     let totalCount: number = 0;
-    this.service.getAll().subscribe(
+    this.service.getEach().subscribe(
       t => {
         // Count the number of folders and set chart
         totalCount++;