Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..6432783c7dc0cb349f6f4257045f990d6b982379
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.globalAlpha.worker.js
@@ -0,0 +1,34 @@
+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.state.saverestore.globalAlpha
+// Description:save()/restore() works for globalAlpha
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("save()/restore() works for globalAlpha");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+// Test that restore() undoes any modifications
+var old = ctx.globalAlpha;
+ctx.save();
+ctx.globalAlpha = 0.5;
+ctx.restore();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+
+// Also test that save() doesn't modify the values
+ctx.globalAlpha = 0.5;
+old = ctx.globalAlpha;
+    // we're not interested in failures caused by get(set(x)) != x (e.g.
+    // from rounding), so compare against 'old' instead of against 0.5
+ctx.save();
+_assertSame(ctx.globalAlpha, old, "ctx.globalAlpha", "old");
+ctx.restore();
+
+t.done();
+
+});
+done();