Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.globalAlpha.invalid.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.invalid
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.globalAlpha = 0.5;
+var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
+ctx.globalAlpha = Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = -Infinity;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+ctx.globalAlpha = NaN;
+_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
+
+t.done();
+
+});
+done();