1 files changed, 51 insertions, 0 deletions
diff --git a/layout/mathml/tests/test_disabled_chrome.html b/layout/mathml/tests/test_disabled_chrome.html
new file mode 100644
index 0000000000..af97f2d430
--- /dev/null
+++ b/layout/mathml/tests/test_disabled_chrome.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=744830
+-->
+<head>
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<!--
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+-->
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=166235">Mozilla Bug 166235</a>
+<div id="testnodes"><span>hi</span> there <!-- mon ami --></div>
+<pre id="test">
+<script type="application/javascript">
+  add_task(async function() {
+    const initialPrefValue = SpecialPowers.getBoolPref("mathml.disabled");
+    SpecialPowers.setBoolPref("mathml.disabled", true);
+    const Cu = SpecialPowers.Components.utils;
+    const { ContentTaskUtils } = ChromeUtils.import("resource://testing-common/ContentTaskUtils.jsm");
+    let t = document.getElementById('testnodes');
+
+    let url = 'chrome://mochitests/content/chrome/layout/mathml/tests/mathml_example_test.html'
+    const chromeIframeEl = document.createElement('iframe');
+    let chromeLoadPromise = ContentTaskUtils.waitForEvent(chromeIframeEl, 'load', false);
+    chromeIframeEl.src = url;
+    t.appendChild(chromeIframeEl);
+
+    await chromeLoadPromise;
+    const chromeBR = chromeIframeEl.contentDocument.body.getBoundingClientRect();
+
+    url = "http://mochi.test:8888/chrome/layout/mathml/tests/mathml_example_test.html";
+    const iframeEl = document.createElement('iframe');
+    iframeEl.src = url;
+    let loadPromise = ContentTaskUtils.waitForEvent(iframeEl, 'load', false);
+    t.appendChild(iframeEl);
+    await loadPromise;
+
+    const contentBR = iframeEl.contentDocument.body.getBoundingClientRect();
+
+    ok(chromeBR.height > contentBR.height, "Chrome content height should be bigger than content due to layout");
+
+    SpecialPowers.setBoolPref("mathml.disabled", initialPrefValue);
+  });
+</script>
+</pre>
+</body>
+</html>
+