fix(drd): always export a name for DRG elements

packages/dmn-js-drd/src/features/label-editing/LabelUtil.js

@@ -33,7 +33,11 @@ export function setLabel(element, text, isExternal) {
   var semantic = element.businessObject,
       attr = getLabelAttr(semantic);
 
-  if (attr) {
+  if (attr === 'name') {
+
+    // name is required by the DMN schema
+    semantic.name = text || '';
+  } else if (attr) {
     semantic[attr] = text;
   }
 

packages/dmn-js-drd/src/features/modeling/ElementFactory.js

@@ -53,6 +53,11 @@ ElementFactory.prototype.createDrdElement = function(elementType, attrs) {
     }
 
     businessObject = drdFactory.create(attrs.type);
+
+    // name is required by the DMN schema
+    if (is(businessObject, 'dmn:DRGElement') && !businessObject.name) {
+      businessObject.name = '';
+    }
   }
 
   if (!businessObject.di) {

packages/dmn-js-drd/test/spec/features/label-editing/LabelEditingProviderSpec.js

@@ -342,7 +342,8 @@ describe('features - label-editing', function() {
       directEdit('dish-decision', ' ');
 
       // then
-      expect(getBusinessObject(decision).name).not.to.exist;
+      // name is required by the DMN schema
+      expect(getBusinessObject(decision).name).to.equal('');
     });
 
   });

packages/dmn-js-drd/test/spec/features/modeling/ElementFactorySpec.js

@@ -105,6 +105,46 @@ describe('features/modeling - create elements', function() {
       expect(di.$type).to.eql('dmndi:DMNEdge');
       expect(di.id).to.match(/DMNEdge_/);
     }));
+
+
+    // name is required by the DMN schema
+    forEach([
+      'dmn:Decision',
+      'dmn:BusinessKnowledgeModel',
+      'dmn:InputData',
+      'dmn:KnowledgeSource'
+    ], function(type) {
+
+      it('should create ' + type + ' with empty name', inject(
+        function(elementFactory) {
+
+          // when
+          var shape = elementFactory.createShape({ type: type });
+
+          // then
+          expect(shape.businessObject.name).to.equal('');
+        }
+      ));
+
+    });
+
+
+    it('should keep given name', inject(function(drdFactory, elementFactory) {
+
+      // given
+      var businessObject = drdFactory.create('dmn:Decision', {
+        name: 'Season'
+      });
+
+      // when
+      var decision = elementFactory.createShape({
+        type: 'dmn:Decision',
+        businessObject: businessObject
+      });
+
+      // then
+      expect(decision.businessObject.name).to.equal('Season');
+    }));
   });