fix(Viewer): allow canvas configuration

Closes #444

lib/Viewer.js

@@ -285,7 +285,7 @@ Viewer.prototype._createDiagram = function(options) {
   options = omit(options, 'additionalModules');
 
   options = assign(options, {
-    canvas: { container: this.container },
+    canvas: assign({}, options.canvas, { container: this.container }),
     modules: modules
   });
 

test/spec/ModelerSpec.js

@@ -185,6 +185,37 @@ describe('Modeler', function() {
   });
 
 
+  describe('configuration', function() {
+
+    // given
+    var xml = require('../fixtures/bpmn/simple.bpmn');
+
+    it('should configure Canvas', function(done) {
+
+      // given
+      var modeler = new Modeler({
+        container: container,
+        canvas: {
+          deferUpdate: true
+        }
+      });
+
+      // when
+      modeler.importXML(xml, function(err) {
+
+        var canvasConfig = modeler.get('config.canvas');
+
+        // then
+        expect(canvasConfig.deferUpdate).to.be.true;
+
+        done();
+      });
+
+    });
+
+  });
+
+
   it('should handle errors', function(done) {
 
     var xml = 'invalid stuff';

test/spec/ViewerSpec.js

@@ -113,36 +113,6 @@ describe('Viewer', function() {
   });
 
 
-  describe('#on', function() {
-
-    it('should fire with given three', function(done) {
-
-      // given
-      var viewer = new Viewer({ container: container });
-
-      var xml = require('../fixtures/bpmn/simple.bpmn');
-
-      // when
-      viewer.on('foo', 1000, function() {
-        return 'bar';
-      }, viewer);
-
-      // then
-      viewer.importXML(xml, function(err) {
-        var eventBus = viewer.get('eventBus');
-
-        var result = eventBus.fire('foo');
-
-        expect(result).to.equal('bar');
-
-        done();
-      });
-
-    });
-
-  });
-
-
   describe('overlay support', function() {
 
     it('should allow to add overlays', function(done) {
@@ -566,6 +536,66 @@ describe('Viewer', function() {
   });
 
 
+  describe('configuration', function() {
+
+    var xml = require('../fixtures/bpmn/simple.bpmn');
+
+    it('should configure Canvas', function(done) {
+
+      // given
+      var viewer = new Viewer({
+        container: container,
+        canvas: {
+          deferUpdate: true
+        }
+      });
+
+      // when
+      viewer.importXML(xml, function(err) {
+
+        var canvasConfig = viewer.get('config.canvas');
+
+        // then
+        expect(canvasConfig.deferUpdate).to.be.true;
+
+        done();
+      });
+
+    });
+
+  });
+
+
+  describe('#on', function() {
+
+    it('should fire with given three', function(done) {
+
+      // given
+      var viewer = new Viewer({ container: container });
+
+      var xml = require('../fixtures/bpmn/simple.bpmn');
+
+      // when
+      viewer.on('foo', 1000, function() {
+        return 'bar';
+      }, viewer);
+
+      // then
+      viewer.importXML(xml, function(err) {
+        var eventBus = viewer.get('eventBus');
+
+        var result = eventBus.fire('foo');
+
+        expect(result).to.equal('bar');
+
+        done();
+      });
+
+    });
+
+  });
+
+
   describe('#destroy', function() {
 
     it('should remove traces in document tree', function() {