Basic Diagram component unit test

ng2-components/ng2-activiti-diagrams/src/components/diagram.component.ts

@@ -39,6 +39,9 @@ export class DiagramComponent {
     @Input()
     height: number = 500;
 
+    @Output()
+    onSuccess = new EventEmitter();
+
     @Output()
     onError = new EventEmitter();
 
@@ -70,6 +73,7 @@ export class DiagramComponent {
         this.diagramsService.getProcessDefinitionModel(processDefinitionId).subscribe(
             (res: any) => {
                 this.diagram = res;
+                this.onSuccess.emit(res);
             },
             (err: any) => {
                 this.onError.emit(err);