1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/2dcontext/the-canvas-state/2d.state.saverestore.globalAlpha.html b/testing/web-platform/tests/2dcontext/the-canvas-state/2d.state.saverestore.globalAlpha.html
new file mode 100644
index 000000000..27fc1aed8
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+++ b/testing/web-platform/tests/2dcontext/the-canvas-state/2d.state.saverestore.globalAlpha.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: 2d.state.saverestore.globalAlpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/canvas-tests.js"></script>
+<link rel="stylesheet" href="/common/canvas-tests.css">
+<body class="show_output">
+
+<h1>2d.state.saverestore.globalAlpha</h1>
+<p class="desc">save()/restore() works for globalAlpha</p>
+
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
+
+<ul id="d"></ul>
+<script>
+var t = async_test("save()/restore() works for globalAlpha");
+_addTest(function(canvas, ctx) {
+
+// 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();
+
+
+});
+</script>
+