1 files changed, 46 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html
new file mode 100644
index 0000000000..d3d13ece09
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.union.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.union</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.union</h1>
+<p class="desc"></p>
+
+
+<script>
+var t = async_test("");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+    throw reason;
+});
+t.step(function() {
+
+  var canvas = new OffscreenCanvas(100, 50);
+  var ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = '#f00';
+  ctx.fillRect(0, 0, 100, 50);
+
+  ctx.lineWidth = 100;
+  ctx.lineCap = 'round';
+
+  ctx.strokeStyle = '#0f0';
+  ctx.beginPath();
+  ctx.moveTo(0, 24);
+  ctx.lineTo(100, 25);
+  ctx.lineTo(0, 26);
+  ctx.closePath();
+  ctx.stroke();
+
+  _assertPixel(canvas, 1,1, 0,255,0,255);
+  _assertPixel(canvas, 25,1, 0,255,0,255);
+  _assertPixel(canvas, 48,1, 0,255,0,255);
+  _assertPixel(canvas, 1,48, 0,255,0,255);
+  _assertPixel(canvas, 25,1, 0,255,0,255);
+  _assertPixel(canvas, 48,48, 0,255,0,255);
+  t.done();
+
+});
+</script>