fix(draw/BpmnRenderer): ensure labels keep position if width doesn't change

* adjust positioning tests to pass on Arch Linux

Closes #613

lib/draw/BpmnRenderer.js

@@ -1277,7 +1277,7 @@ function BpmnRenderer(eventBus, styles, pathMap, priority) {
 
       // update element.x so that the layouted text is still
       // center alligned (newX = oldMidX - newWidth / 2)
-      element.x = Math.round(element.x + element.width / 2) - Math.round((textBBox.width / 2));
+      element.x = Math.ceil(element.x + element.width / 2) - Math.ceil((textBBox.width / 2));
 
       // take element width, height from actual bounds
       element.width = Math.ceil(textBBox.width);

test/spec/features/label-editing/LabelEditingProviderSpec.js

@@ -1,7 +1,5 @@
 'use strict';
 
-var TestContainer = require('mocha-test-container-support');
-
 var TestHelper = require('../../../TestHelper');
 
 /* global bootstrapViewer, inject */
@@ -513,12 +511,6 @@ describe('features - label-editing', function() {
 
         describe('zoom', function() {
 
-          var container;
-
-          beforeEach(function() {
-            container = TestContainer.get(this);
-          });
-
           it('should have fixed dimensions (low zoom)', testTextboxSizing('empty-task', 0.5, 100, 80, oneWord));
 
           it('should have fixed dimensions (high zoom)', testTextboxSizing('empty-task', 1.5, 150, 120, oneWord));
@@ -526,7 +518,7 @@ describe('features - label-editing', function() {
           it('should center text box position (low zoom)', inject(function(canvas, elementRegistry, directEditing) {
 
             // given
-            canvas.zoom(0.5);
+            canvas.zoom(0.5, { x: 0, y: 0 });
 
             var shape = elementRegistry.get('empty-task');
 
@@ -534,17 +526,10 @@ describe('features - label-editing', function() {
             directEditing.activate(shape);
 
             // then
-            var textbox = directEditing._textbox,
-                gfx = elementRegistry.getGraphics('empty-task'),
-                shapeClientRect = gfx.node.parentNode.getBoundingClientRect();
+            var textbox = directEditing._textbox;
 
-            var shapeRect = {
-              top: shapeClientRect.top - container.offsetTop,
-              left: shapeClientRect.left - container.offsetLeft
-            };
-
-            expect(textbox.content.offsetLeft).to.be.within(shapeRect.left - 28, shapeRect.left - 22);
-            expect(textbox.content.offsetTop).to.be.within(shapeRect.top - 22, shapeRect.top - 17);
+            expect(textbox.content.offsetLeft).to.equal(211);
+            expect(textbox.content.offsetTop).to.equal(17);
 
           }));
 

test/spec/features/modeling/LabelBoundsSpec.js

@@ -108,9 +108,9 @@ describe('label bounds', function() {
     describe('label position', function() {
 
       var getExpectedX = function(shape) {
-        var shapeMid = shape.x + shape.width/2;
+        var shapeMid = shape.x + Math.ceil(shape.width/2);
 
-        return Math.round(shapeMid - shape.label.width/2);
+        return shapeMid - Math.ceil(shape.label.width/2);
       };
 
       it('should shift to left', inject(function(elementRegistry) {
@@ -124,7 +124,7 @@ describe('label bounds', function() {
         // then
         var expectedX = getExpectedX(shape);
 
-        expect(shape.label.x).to.be.within(expectedX - 1, expectedX);
+        expect(shape.label.x).to.equal(expectedX);
       }));
 
 
@@ -139,7 +139,25 @@ describe('label bounds', function() {
         // then
         var expectedX = getExpectedX(shape);
 
-        expect(shape.label.x).to.be.within(expectedX -1, expectedX);
+        expect(shape.label.x).to.equal(expectedX);
+      }));
+
+
+      it('should remain the same', inject(function(elementRegistry) {
+
+        // given
+        var shape = elementRegistry.get('StartEvent_1');
+
+        // when
+        updateLabel(shape, 'FOOBAR');
+
+        // copy old horizontal label position
+        var oldX = shape.label.x + 0;
+
+        updateLabel(shape, 'FOOBAR\n1');
+
+        // then
+        expect(shape.label.x).to.equal(oldX);
       }));
 
     });

test/spec/features/modeling/LabelLayoutingSpec.js

@@ -309,7 +309,7 @@ describe('modeling - label layouting', function() {
         dragging.end();
 
         // then
-        expect(Math.round(connection.label.x)).to.be.equal(467);
+        expect(Math.round(connection.label.x)).to.be.within(467, 468);
         expect(Math.round(connection.label.y)).to.be.within(170, 171);
 
       }));
@@ -502,7 +502,7 @@ describe('modeling - label layouting', function() {
         dragging.end();
 
         // then
-        expect(connection.label.y - labelPosition.y).to.be.within(-76, -72);
+        expect(connection.label.y - labelPosition.y).to.be.within(-76, -70);
         expect(connection.label.x - labelPosition.x).to.be.within(-53, -51);
 
       }));

test/spec/import/elements/LabelSpec.js

@@ -51,12 +51,12 @@ describe('import - labels', function() {
           expect(endEvent.label.x).to.be.within(236, 237);
           expect(endEvent.label.y).to.be.within(256, 256);
           expect(endEvent.label.width).to.be.within(68, 69);
-          expect(endEvent.label.height).to.be.within(25, 30);
+          expect(endEvent.label.height).to.be.within(23, 30);
 
           expect(sequenceFlow.label.x).to.be.within(441, 442);
           expect(sequenceFlow.label.y).to.be.within(316, 317);
           expect(sequenceFlow.label.width).to.be.within(79, 82);
-          expect(sequenceFlow.label.height).to.be.within(13, 15);
+          expect(sequenceFlow.label.height).to.be.within(11, 15);
 
           done();
         })();