feat(label-behavior): correctly retrieve label from element

Relates to camunda/camunda-modeler#1417

lib/features/modeling/behavior/LabelBehavior.js

@@ -15,6 +15,10 @@ import {
   hasExternalLabel
 } from '../../../util/LabelUtil';
 
+import {
+  getLabel
+} from '../../label-editing/LabelUtil';
+
 import {
   getLabelAdjustment
 } from './util/LabelLayoutUtil';
@@ -105,8 +109,8 @@ export default function LabelBehavior(
       return;
     }
 
-    // only create label if name
-    if (!businessObject.name) {
+    // only create label if attribute available
+    if (!getLabel(element)) {
       return;
     }
 
@@ -115,7 +119,7 @@ export default function LabelBehavior(
     // we don't care about x and y
     var labelDimensions = textRenderer.getExternalLabelBounds(
       DEFAULT_LABEL_DIMENSIONS,
-      businessObject.name || ''
+      getLabel(element)
     );
 
     modeling.createLabel(element, labelCenter, {

test/spec/features/modeling/behavior/LabelBehaviorSpec.js

@@ -151,6 +151,31 @@ describe('behavior - LabelBehavior', function() {
     ));
 
 
+    it('should add to group', inject(
+      function(bpmnFactory, elementRegistry, modeling) {
+
+        // given
+        var parentShape = elementRegistry.get('Process_1'),
+            categoryValue = bpmnFactory.create('bpmn:CategoryValue', {
+              value: 'foo'
+            }),
+            businessObject = bpmnFactory.create('bpmn:Group', {
+              categoryValueRef: categoryValue
+            }),
+            newShapeAttrs = {
+              type: 'bpmn:Group',
+              businessObject: businessObject
+            };
+
+        // when
+        var newShape = modeling.createShape(newShapeAttrs, { x: 50, y: 50 }, parentShape);
+
+        // then
+        expect(newShape.label).to.exist;
+      }
+    ));
+
+
     it('should not add to task', inject(
       function(elementFactory, elementRegistry, modeling) {