fix(import/Importer): clear commandStack after import

lib/import/Importer.js

@@ -85,6 +85,7 @@ function importBpmnDiagram(diagram, definitions, done) {
 
   var canvas = diagram.get('canvas');
   var events = diagram.get('eventBus');
+  var commandStack = diagram.get('commandStack');
 
 
   function addLabel(element, di, data) {
@@ -167,6 +168,8 @@ function importBpmnDiagram(diagram, definitions, done) {
   var walker = new BpmnTreeWalker(visitor);
   walker.handleDefinitions(definitions);
 
+  commandStack.clear();
+
   done();
 }
 

test/spec/browser/import/ImporterSpec.js

@@ -76,4 +76,29 @@ describe('import - importer', function() {
     });
   });
 
+
+  it('should clear commandStack after import', function(done) {
+
+    // given
+    var xml = fs.readFileSync('test/fixtures/bpmn/simple.bpmn', 'utf8');
+
+    var diagram = createDiagram();
+
+    var commandStack = diagram.get('commandStack');
+
+    // when
+    BpmnModel.fromXML(xml, function(err, definitions) {
+      if (err) {
+        return done(err);
+      }
+
+      // when
+      Importer.importBpmnDiagram(diagram, definitions, function(err) {
+        expect(commandStack.getStack()).toEqual([]);
+
+        done(err);
+      });
+    });
+  });
+
 });