Implement unit tests for getWinding() and zero-winding curves.

Closes #819

test/tests/HitResult.js

@@ -12,7 +12,7 @@
 
 module('HitResult');
 
-test('hit-testing options', function() {
+test('Hit-testing options', function() {
     var defaultOptions = {
         type: null,
         tolerance: paper.settings.hitTolerance,
@@ -296,7 +296,7 @@ test('hit-testing stroke on segment point of a path', function() {
     equals(error == null, true, description);
 });
 
-test('Hit testing a point that is extremely close to a curve', function() {
+test('hit-testing a point that is extremely close to a curve', function() {
     var path = new Path.Rectangle([0, 0], [100, 100]);
     // A point whose x value is extremely close to 0:
     var point = new Point(2.842 / Math.pow(10, 14), 0);
@@ -492,7 +492,7 @@ test('hitting path with a text item in the project', function() {
 
 });
 
-test('Check hit-testing of items that come after a transformed group.', function() {
+test('hit-testing of items that come after a transformed group.', function() {
     paper.project.currentStyle.fillColor = 'black';
     var point1 = new Point(100, 100);
     var point2 = new Point(140, 100);
@@ -556,7 +556,7 @@ test('Check hit-testing of items that come after a transformed group.', function
     }, path1, 'After moving group before path1, hit-testing path1 for point1 should give us path1.');
 });
 
-test('Check hit-testing of placed symbols.', function() {
+test('hit-testing of placed symbols.', function() {
     var point = new Point(100, 100);
 
     var path = new Path.Circle([0, 0], 20);
@@ -570,7 +570,7 @@ test('Check hit-testing of placed symbols.', function() {
 
 });
 
-test('Hit testing the corner of a rectangle with miter stroke.', function() {
+test('hit-testing the corner of a rectangle with miter stroke.', function() {
     var rect = new Path.Rectangle({
         rectangle: [100, 100, 300, 200],
         fillColor: '#f00',
@@ -583,7 +583,7 @@ test('Hit testing the corner of a rectangle with miter stroke.', function() {
     }, true);
 });
 
-test('Hit testing invisible items.', function() {
+test('hit-testing invisible items.', function() {
     var point = new Point(0, 0);
     var circle1 = new Path.Circle({
         center: point.subtract([25, 0]),
@@ -607,7 +607,7 @@ test('Hit testing invisible items.', function() {
     }, true);
 });
 
-test('Hit testing guides.', function() {
+test('hit-testing guides.', function() {
     var point = new Point(0, 0);
     var circle1 = new Path.Circle({
         center: point.subtract([25, 0]),
@@ -641,7 +641,7 @@ test('Hit testing guides.', function() {
     }, true);
 });
 
-test('Hit testing fill with tolerance', function() {
+test('hit-testing fill with tolerance', function() {
     var path = new Path.Rectangle({
         from: [50, 50],
         to: [200, 200],
@@ -658,7 +658,7 @@ test('Hit testing fill with tolerance', function() {
     }, true);
 });
 
-test('Hit testing compound-paths', function() {
+test('hit-testing compound-paths', function() {
     var center = new Point(100, 100);
     var path1 = new Path.Circle({
         center: center,

test/tests/PathItem_Contains.js

@@ -214,3 +214,69 @@ test('Path#contains() (complex shape)', function() {
     testPoint(path, new Point(431, 104), false);
 });
 
+
+test('Path#contains() (straight curves with zero-winding)', function() {
+    var pathPoints = [
+        [140, 100],
+        [140, 10],
+        [100, 10],
+        [100, 20],
+        [120, 20],
+        [120, 40],
+        [100, 40],
+        [100, 60],
+        [200, 60],
+        [120, 60],
+        [120, 100],
+        [300, 100],
+        [50, 100]
+    ];
+
+    var path1 = new Path({
+        segments: pathPoints,
+        closed: true,
+        fillRule: 'evenodd'
+    });
+
+    var hitPoints = [
+        [[30,10], false],
+        [[110,10], true],
+        [[30,20], false],
+        [[110,20], true],
+        [[130,20], true],
+        [[170,20], false],
+        [[110,50], true],
+        [[30,60], false],
+        [[110,60], true],
+        [[130,60], true],
+        [[150,60], false],
+        [[230,60], false],
+        [[10,100], false],
+        [[60,100], false],
+        [[130,100], true],
+        [[170,100], false],
+        [[370,100], false]
+    ];
+
+    for (var i = 0; i < hitPoints.length; i++) {
+        var entry = hitPoints[i];
+        testPoint(path1, new Point(entry[0]), entry[1]);
+    }
+
+    // Now test the x-y-reversed shape
+
+    for (var i = 0; i < pathPoints.length; i++) {
+        pathPoints[i].reverse();
+    }
+
+    var path1 = new Path({
+        segments: pathPoints,
+        closed: true,
+        fillRule: 'evenodd'
+    });
+
+    for (var i = 0; i < hitPoints.length; i++) {
+        var entry = hitPoints[i];
+        testPoint(path1, new Point(entry[0].reverse()), entry[1]);
+    }
+})