Define additional boolean tests and improve resemble.js based image diffing.

test/js/helpers.js

@@ -17,8 +17,7 @@ delete window.history;
 window.history = {};
 
 QUnit.begin(function() {
-    if (/hidepassed/.test(document.location.href)) {
-        QUnit.config.hidepassed = true;
+    if (QUnit.urlParams.hidepassed) {
         document.getElementById('qunit-tests').className += ' hidepass';
     }
     resemble.outputSettings({
@@ -63,33 +62,55 @@ function compareItem(actual, expected, message, options, properties) {
                 + '" src="'+ raster.source + '">'
     }
 
+    function rasterize(item, group, resolution) {
+        var raster = null;
+        if (group) {
+            group.addChild(item);
+            raster = group.rasterize(resolution, false);
+            item.remove();
+        }
+        return raster;
+    }
+
     if (options && options.rasterize) {
-        var resolution = options.rasterize == true ? 72 : options.rasterize;
-        var raster1 = actual && actual.rasterize(resolution, false),
-            raster2 = expected && expected.rasterize(resolution, false);
-        if (!raster1 || !raster2) {
+        // In order to properly compare pixel by pixel, we need to put each item
+        // into a group with a white background of the united dimensions of the
+        // bounds of both items before rasterizing.
+        var resolution = options.rasterize == true ? 72 : options.rasterize,
+            group = actual && expected && new Group({
+                insert: false,
+                children: [
+                    new Shape.Rectangle({
+                        rectangle: actual.bounds.unite(expected.bounds),
+                        fillColor: 'white'
+                    })
+                ]
+            }),
+            actual = rasterize(actual, group, resolution),
+            expected = rasterize(expected, group, resolution);
+        if (!actual || !expected) {
             QUnit.pushFailure('Unable to compare rasterized items: ' +
-                    (!raster1 ? 'actual' : 'expected') + ' item is null',
+                    (!actual ? 'actual' : 'expected') + ' item is null',
                     QUnit.stack(2));
         } else {
             // Use resemble.js to compare the two rasterized items.
             var id = QUnit.config.current.testId,
                 result;
-            resemble(raster1.getImageData())
-                .compareTo(raster2.getImageData())
+            resemble(actual.getImageData())
+                .compareTo(expected.getImageData())
                 // When working with imageData, this call is synchronous:
                 .onComplete(function(data) { result = data; });
             var identical = result ? 100 - result.misMatchPercentage : 0,
-                ok = identical == 100.0;
-            QUnit.push(ok, identical.toFixed(1) + '% identical',
-                    '100.0% identical', message);
+                ok = identical == 100;
+            QUnit.push(ok, identical.toFixed(2) + '% identical',
+                    '100.00% identical', message);
             if (!ok && result) {
                 var output = document.getElementById('qunit-test-output-' + id),
                     bounds = result.diffBounds;
                 output.querySelector('.test-expected td').innerHTML =
-                        getImageTag(raster1);
+                        getImageTag(expected);
                 var el = output.querySelector('.test-actual td');
-                el.innerHTML = getImageTag(raster2) + '<br>' +
+                el.innerHTML = getImageTag(actual) + '<br>' +
                         el.innerHTML.replace(/<\/?pre>|"/g, '');
                 output.querySelector('.test-diff td').innerHTML =
                         getImageTag({

test/tests/Path_Boolean.js

@@ -66,3 +66,77 @@ test('ring.subtract(square); #610', function() {
 
     equals(result, expected, 'ring.subtract(square);', { rasterize: true });
 });
+
+test('circle.subtract(arc); #719', function() {
+    // https://github.com/paperjs/paper.js/issues/719
+    var radius = 50;
+    var circle = new Path.Circle([0, 0], radius);
+    circle.fillColor = 'blue';
+    var arc = new Path.Arc([0, -radius], [radius, 0], [0, radius])
+    arc.fillColor = 'blue';
+    arc.closed = true;
+    arc.pivot = arc.bounds.leftCenter;
+
+    var result = circle.subtract(arc);
+    // Rotate the arc by 180 to receive the expected shape to compare against
+    arc.rotate(180);
+
+    equals(result, arc, 'circle.subtract(arc);', { rasterize: true });
+});
+
+test('compoundPath.intersect(rect);', function() {
+    var compoundPath = new CompoundPath();
+    compoundPath.addChild(new Path.Rectangle(new Point(140, 10), [100, 300]));
+    compoundPath.addChild(new Path.Rectangle(new Point(150, 80), [50, 80]));
+    compoundPath.fillColor = 'blue';
+    var rect = new Path.Rectangle(new Point(50, 50), [100, 150]);
+    var result = compoundPath.intersect(rect);
+
+    var expected = new Path({
+        pathData: 'M140,50l10,0l0,150l-10,0z',
+        fillColor: 'blue'
+    });
+
+    equals(result, expected, 'compoundPath.intersect(rect);', { rasterize: true });
+});
+
+test('multiple exclusions', function() {
+    var shape0 = new Path.Rectangle({
+        insert: false,
+        point: [304, 226],
+        size: [328, 328],
+        fillColor: 'blue'
+    });
+    var shape1 = new Path({
+        insert: false,
+        segments: [
+            [213.5, 239],
+            [476.5, 279],
+            [716, 233.5],
+            [469, 74]
+        ],
+        closed: true
+    });
+    var res1 = shape0.exclude(shape1);
+    var shape2 = new Path.Rectangle({
+        insert: false,
+        point: [174, 128],
+        size: [309, 251]
+    });
+    var res2 = res1.exclude(shape2);
+    // shape3
+    var shape3 = new Path.Rectangle({
+        insert: false,
+        point: [318, 148],
+        size: [302, 302]
+    });
+    // exclude res2 & shape3
+    var result = res2.exclude(shape3);
+
+    var expected = new CompoundPath({
+        pathData: 'M304,554l0,-175l14,0l0,71l302,0l0,-198.262l12,-2.27975l0,304.54175z M318,379l165,0l0,-101.23486l137,-26.02714l0,-25.738l-137,0l0,-78l-128.58788,0l-36.41212,23.51468l0,54.48532l165,0l0,51.76514l-6.5,1.23486l-158.5,-24.10646z M174,379l0,-251l211.38182,0l-30.9697,20l-36.41212,0l0,23.51468l-104.5,67.48532l90.5,13.76426l0,-26.76426l14,0l0,28.89354l-14,-2.12928l0,126.23574z M385.38182,128l83.61818,-54l114.59561,74l-100.59561,0l0,-20z M583.59561,148l36.40439,23.5081l0,-23.5081z M620,171.5081l96,61.9919l-84,15.95825l0,-23.45825l-12,0z',
+        fillColor: 'blue'
+    });
+
+    equals(result, expected, 'res2.exclude(shape3);', { rasterize: true });
+})