fix(import): set <isFrame> property on import

Closes #1278

lib/import/BpmnImporter.js

@@ -115,7 +115,8 @@ BpmnImporter.prototype.add = function(semantic, parentElement) {
   // SHAPE
   else if (is(di, 'bpmndi:BPMNShape')) {
 
-    var collapsed = !isExpanded(semantic);
+    var collapsed = !isExpanded(semantic),
+        isFrame = isFrameElement(semantic);
     hidden = parentElement && (parentElement.hidden || parentElement.collapsed);
 
     var bounds = semantic.di.bounds;
@@ -126,7 +127,8 @@ BpmnImporter.prototype.add = function(semantic, parentElement) {
       x: Math.round(bounds.x),
       y: Math.round(bounds.y),
       width: Math.round(bounds.width),
-      height: Math.round(bounds.height)
+      height: Math.round(bounds.height),
+      isFrame: isFrame
     }));
 
     if (is(semantic, 'bpmn:BoundaryEvent')) {
@@ -332,4 +334,8 @@ function isPointInsideBBox(bbox, point) {
     x <= bbox.x + bbox.width &&
     y >= bbox.y &&
     y <= bbox.y + bbox.height;
+}
+
+function isFrameElement(semantic) {
+  return is(semantic, 'bpmn:Group');
 }

test/fixtures/bpmn/import/groups.bpmn

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<bpmn2:definitions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bpmn2="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" id="simple" targetNamespace="http://bpmn.io/schema/bpmn" exporter="camunda modeler" exporterVersion="2.6.0" xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd">
+  <bpmn2:process id="Process_1" isExecutable="false">
+    <bpmn2:group id="Group_1" categoryValueRef="CategoryValue_1o9po2j" />
+  </bpmn2:process>
+  <bpmn2:category id="Category_0fj5y1s">
+    <bpmn2:categoryValue id="CategoryValue_1o9po2j" />
+  </bpmn2:category>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1">
+      <bpmndi:BPMNShape id="Group_1_di" bpmnElement="Group_1">
+        <dc:Bounds x="280" y="60" width="430" height="360" />
+      </bpmndi:BPMNShape>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn2:definitions>

test/spec/import/ImporterSpec.js

@@ -480,6 +480,38 @@ describe('import - Importer', function() {
       });
     });
 
+
+    it('should import groups', function(done) {
+
+      // given
+      var xml = require('../../fixtures/bpmn/import/groups.bpmn');
+
+      var events = [];
+
+      // log events
+      diagram.get('eventBus').on('bpmnElement.added', function(e) {
+        events.push({
+          type: 'add',
+          semantic: e.element.businessObject.id,
+          di: e.element.businessObject.di.id,
+          diagramElement: e.element && e.element.id,
+          isFrame: e.element && e.element.isFrame
+        });
+      });
+
+      // when
+      runImport(diagram, xml, function(err) {
+
+        // then
+        expect(events).to.eql([
+          { type: 'add', semantic: 'Process_1', di: 'BPMNPlane_1', diagramElement: 'Process_1', isFrame: undefined },
+          { type: 'add', semantic: 'Group_1', di: 'Group_1_di', diagramElement: 'Group_1', isFrame: true }
+        ]);
+
+        done(err);
+      });
+    });
+
   });