fix: show modeling feedback error for data objects

Related to camunda/camunda-modeler#4345

---------

Co-authored-by: Maciej Barelkowski <maciejbarel@gmail.com>

Author: ssidharth010

lib/features/modeling-feedback/ModelingFeedback.js

@@ -7,6 +7,7 @@ import { is } from '../../util/ModelUtil';
  */
 
 var COLLAB_ERR_MSG = 'flow elements must be children of pools/participants';
+var DATA_OBJECT_ERR_MSG = 'Data object must be placed within a pool/participant.';
 
 /**
  * @param {EventBus} eventBus
@@ -32,8 +33,12 @@ export default function ModelingFeedback(eventBus, tooltips, translate) {
         shape = context.shape,
         target = context.target;
 
-    if (is(target, 'bpmn:Collaboration') && is(shape, 'bpmn:FlowNode')) {
-      showError(event, translate(COLLAB_ERR_MSG));
+    if (is(target, 'bpmn:Collaboration')) {
+      if (is(shape, 'bpmn:FlowNode')) {
+        showError(event, translate(COLLAB_ERR_MSG));
+      } else if (is(shape, 'bpmn:DataObjectReference')) {
+        showError(event, translate(DATA_OBJECT_ERR_MSG));
+      }
     }
   });
 

test/spec/features/modeling-feedback/ModelingFeedbackSpec.js

@@ -25,27 +25,46 @@ describe('features/modeling - ModelingFeedback', function() {
     ]
   }));
 
+  it('should indicate error when placing flow elements inside collaboration', inject(
+    function(create, canvas, elementFactory, dragging) {
 
-  it('should indicate', inject(function(create, canvas, elementFactory, dragging) {
+      // given
+      var task = elementFactory.createShape({ type: 'bpmn:Task' });
 
-    // given
-    var task = elementFactory.createShape({ type: 'bpmn:Task' });
+      var collaboration = canvas.getRootElement();
+      var collaborationGfx = canvas.getGraphics(collaboration);
 
-    var collaboration = canvas.getRootElement();
-    var collaborationGfx = canvas.getGraphics(collaboration);
+      create.start(canvasEvent({ x: 100, y: 100 }), task);
+      dragging.hover({ element: collaboration, gfx: collaborationGfx });
 
-    create.start(canvasEvent({ x: 100, y: 100 }), task);
-    dragging.hover({ element: collaboration, gfx: collaborationGfx });
+      // when
+      dragging.end();
 
-    // when
-    dragging.end();
+      // then
+      expectTooltip('error', 'flow elements must be children of pools/participants');
+    }));
 
-    // then
-    expectTooltip('error', 'flow elements must be children of pools/participants');
-  }));
+  it('should indicate error when placing data objects inside collaboration', inject(
+    function(create, canvas, elementFactory, dragging) {
 
-});
+      // given
+      var dataObject = elementFactory.createShape({ type: 'bpmn:DataObjectReference' });
+
+      var collaboration = canvas.getRootElement();
+      var collaborationGfx = canvas.getGraphics(collaboration);
+
+      create.start(canvasEvent({ x: 150, y: 150 }), dataObject);
+      dragging.hover({ element: collaboration, gfx: collaborationGfx });
 
+      // when
+      dragging.end();
+
+      // then
+      expectTooltip('error', 'Data object must be placed within a pool/participant.');
+    }
+  ));
+
+});
 
 function expectTooltip(cls, message) {