From 223b2bac8f41b51b10c8a7ca5f8ea2a80bbe6b41 Mon Sep 17 00:00:00 2001
From: Anne van Kesteren <annevk@annevk.nl>
Date: Fri, 15 Mar 2019 19:06:52 +0100
Subject: [PATCH] HTML: mutating the style element

---
 .../the-style-element/mutations.window.js                  | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 html/semantics/document-metadata/the-style-element/mutations.window.js

diff --git a/html/semantics/document-metadata/the-style-element/mutations.window.js b/html/semantics/document-metadata/the-style-element/mutations.window.js
new file mode 100644
index 00000000000000..b8ccedc9a05176
--- /dev/null
+++ b/html/semantics/document-metadata/the-style-element/mutations.window.js
@@ -0,0 +1,7 @@
+test(() => {
+  const style = document.body.appendChild(document.createElement("style")),
+        styleS = style.sheet;
+  assert_not_equals(styleS, null);
+  style.appendChild(new Comment());
+  assert_equals(styleS, style.sheet);
+}, "Mutating the style element: inserting a Comment node");