1 files changed, 41 insertions, 0 deletions
diff --git a/layout/reftests/bugs/355548-4.xml b/layout/reftests/bugs/355548-4.xml
new file mode 100644
index 000000000..5a73aff01
--- /dev/null
+++ b/layout/reftests/bugs/355548-4.xml
@@ -0,0 +1,41 @@
+<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait">
+<head>
+<style>
+/* test the situation where an nsStyleFont is cached in the rule tree but we have to blow it
+   away because MathML is suddenly introduced */
+.v { font: 48px "Verdana"; }
+</style>
+<script>
+function addMathML() {
+  function createMathMLElement(tag) {
+    return document.createElementNS("http://www.w3.org/1998/Math/MathML", tag);
+  }
+  
+  var body = document.getElementById("body");
+  body.offsetTop;
+
+  // if we don't blow away the rule tree correctly, then we will cache an nsStyleFont with
+  // a scriptsizemultiplier of 0.71 (the default) and use it to style mstyle2, so the
+  // scriptlevel change will not scale the text by 0.5
+  var math = createMathMLElement("math");
+  var mstyle = createMathMLElement("mstyle");
+  mstyle.setAttribute("scriptsizemultiplier", "0.5");
+  var mstyle2 = createMathMLElement("mstyle");
+  mstyle2.setAttribute("class", "v");
+  var mstyle3 = createMathMLElement("mstyle");
+  mstyle3.setAttribute("scriptlevel", "+1");
+  var mi = createMathMLElement("mi");
+  mi.textContent = "Id";
+  mstyle3.appendChild(mi);
+  mstyle2.appendChild(mstyle3);
+  mstyle.appendChild(mstyle2);
+  math.appendChild(mstyle);
+  body.appendChild(math);
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body id="body" onload="addMathML()">
+<p><span class="v">Hello</span></p>
+</body>
+</html>