chromium/third_party/blink/web_tests/fast/canvas/canvas-bezier-same-endpoint.html

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<canvas id="canvas" width="100" height="100"></canvas>

<script>
test(function(t) {
    var ctx = document.getElementById('canvas').getContext('2d');
    var data;
    
    function shouldBeYellow(x,y)
    {
        blue_value = ctx.getImageData(x, y, 1, 1).data[2];
        assert_equals(blue_value, 0);
    }
    
    function shouldBeBlue(x,y)
    {
        blue_value = ctx.getImageData(x, y, 1, 1).data[2];
        assert_equals(blue_value, 255);
    }
    
    ctx.fillStyle = '#00f';
    ctx.strokeStyle = '#ff0';
    ctx.lineWidth = 30;
    
    ctx.beginPath();
    ctx.fillRect(0,0,100,100);
    ctx.moveTo(0,0);
    
    // bezier curve with coincident endpoints, horizontal line
    ctx.bezierCurveTo(0,0,200,0,0,0);
    shouldBeBlue(50,0);
    ctx.stroke();
    shouldBeYellow(50,0);
    shouldBeBlue(0,50);
    shouldBeBlue(70,70);
    
    // bezier curve with coincident endpoints, vertical line
    ctx.bezierCurveTo(0,200,0,0,0,0);
    ctx.stroke();
    shouldBeYellow(50,0);
    shouldBeBlue(75,75);
    
    // bezier curve with coincident endpoints
    ctx.bezierCurveTo(200,0,0,200,0,0);
    ctx.stroke();
    shouldBeYellow(75,75);
}, 'Test correct rendering of quadratic and bezier curves with coincident endpoints (bug 105650)');
</script>