1 files changed, 36 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js
new file mode 100644
index 0000000000..cd38d56c51
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.js
@@ -0,0 +1,36 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.globalCompositeOperation
+// Description:save()/restore() works for globalCompositeOperation
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("save()/restore() works for globalCompositeOperation");
+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');
+
+  // Test that restore() undoes any modifications
+  var old = ctx.globalCompositeOperation;
+  ctx.save();
+  ctx.globalCompositeOperation = "copy";
+  ctx.restore();
+  _assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+
+  // Also test that save() doesn't modify the values
+  ctx.globalCompositeOperation = "copy";
+  old = ctx.globalCompositeOperation;
+      // we're not interested in failures caused by get(set(x)) != x (e.g.
+      // from rounding), so compare against 'old' instead of against "copy"
+  ctx.save();
+  _assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");
+  ctx.restore();
+  t.done();
+});
+done();