test(snapping): add participant snapping test case

Related to #290

lib/features/snapping/BpmnSnapping.js

@@ -132,8 +132,8 @@ function BpmnSnapping(eventBus, canvas) {
     if (is(shape, 'bpmn:Participant')) {
         context.minDimensions = { width: 400, height: 200 };
         context.childrenBoxPadding = {
-            left: 50,
+          left: 50,
-            right: 35
+          right: 35
         };
     }
 

test/spec/features/snapping/BpmnSnappingSpec.js

@@ -168,6 +168,7 @@ describe('features/snapping - BpmnSnapping', function() {
 
 
   describe('on shape resize', function () {
+
     var diagramXML = require('../../../fixtures/bpmn/collaboration-resize.bpmn');
 
     var testResizeModules = [ coreModule, resizeModule, rulesModule, snappingModule ];
@@ -181,6 +182,36 @@ describe('features/snapping - BpmnSnapping', function() {
     }));
 
 
+    describe('Participant min bounds', function() {
+
+      it('should snap <se>', inject(function(canvas, elementRegistry, resize, dragging) {
+
+        var participant = elementRegistry.get('Participant_2');
+
+        resize.activate(Events.create(canvas._svg, { x: 500, y: 500 }), participant, 'se');
+        dragging.move(Events.create(canvas._svg, { x: 0, y: 0 }));
+        dragging.end();
+
+        expect(participant.width).toEqual(400);
+        expect(participant.height).toEqual(200);
+      }));
+
+
+      it('should snap from <nw>', inject(function(canvas, elementRegistry, resize, dragging) {
+
+        var participant = elementRegistry.get('Participant_2');
+
+        resize.activate(Events.create(canvas._svg, { x: 0, y: 0 }), participant, 'nw');
+        dragging.move(Events.create(canvas._svg, { x: 500, y: 500 }));
+        dragging.end();
+
+        expect(participant.width).toEqual(400);
+        expect(participant.height).toEqual(200);
+      }));
+
+    });
+
+
     it('should snap a SubProcess to minimum bounds', inject(function(canvas, elementRegistry, resize, dragging) {
 
       var subProcess = elementRegistry.get('SubProcess_1');
@@ -206,6 +237,7 @@ describe('features/snapping - BpmnSnapping', function() {
       expect(participant.height).toEqual(200);
     }));
 
+
     it('should snap a TextAnnotation to minimum bounds', inject(function(canvas, elementRegistry, resize, dragging) {
 
       var textAnnotation = elementRegistry.get('TextAnnotation_1');