feat(modeling): combining two sequence flows when removing an element

combines only if removed element has one outgoing and one incoming sequence flow

Closes #433

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

@@ -0,0 +1,77 @@
+'use strict';
+
+/* global bootstrapModeler, inject */
+
+var modelingModule = require('../../../../../lib/features/modeling'),
+    coreModule = require('../../../../../lib/core');
+
+describe('features/modeling - remove element behavior', function() {
+
+  var testModules = [ coreModule, modelingModule ];
+
+  describe('combine sequence flow when deleting element', function() {
+
+    var processDiagramXML = require('./RemoveElementBehavior.bpmn');
+
+    beforeEach(bootstrapModeler(processDiagramXML, { modules: testModules }));
+
+    it('should combine sequence flows on remove', inject(function(modeling, elementRegistry) {
+
+      // given
+      var task = elementRegistry.get('Task1');
+
+      // when
+      modeling.removeShape(task);
+
+      // then
+      expect(elementRegistry.get(task.id)).to.be.undefined;
+      expect(elementRegistry.get('SequenceFlow1')).to.not.be.undefined;
+      expect(elementRegistry.get('SequenceFlow2')).to.be.undefined;
+
+      expect(elementRegistry.get('StartEvent1').outgoing.length).to.be.equal(1);
+      expect(elementRegistry.get('EndEvent1').incoming.length).to.be.equal(1);
+
+    }));
+
+
+    it('should remove all sequence flows', inject(function(modeling, elementRegistry) {
+
+      // given
+      var task = elementRegistry.get('Task3');
+
+      // when
+      modeling.removeShape(task);
+
+      // then
+      expect(elementRegistry.get(task.id)).to.be.undefined;
+      expect(elementRegistry.get('SequenceFlow4')).to.be.undefined;
+      expect(elementRegistry.get('SequenceFlow5')).to.be.undefined;
+      expect(elementRegistry.get('SequenceFlow6')).to.be.undefined;
+
+      expect(elementRegistry.get('StartEvent2').outgoing).to.be.empty;
+      expect(elementRegistry.get('StartEvent2').incoming).to.be.empty;
+
+    }));
+
+
+    it('should not combine not allowed connection', inject(function(modeling, elementRegistry) {
+
+      // given
+      var task = elementRegistry.get('Task2');
+
+      // when
+      modeling.removeShape(task);
+
+      // then
+      expect(elementRegistry.get(task.id)).to.be.undefined;
+      expect(elementRegistry.get('SequenceFlow3')).to.be.undefined;
+      expect(elementRegistry.get('DataOutputAssociation1')).to.be.undefined;
+
+      expect(elementRegistry.get('DataStoreReference1').incoming).to.be.empty;
+      expect(elementRegistry.get('IntermediateThrowEvent1').outgoing.length).to.be.eql(1);
+
+    }));
+
+  });
+
+});