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-rw-r--r--layout/reftests/css-ui-invalid/button/button-fieldset-legend.html22
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diff --git a/layout/reftests/css-ui-invalid/button/button-fieldset-legend.html b/layout/reftests/css-ui-invalid/button/button-fieldset-legend.html
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index 0000000000..66b5ae585c
--- /dev/null
+++ b/layout/reftests/css-ui-invalid/button/button-fieldset-legend.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <!-- Test: if button has a disabled fieldset ancestor, but is in the first
+ legend, it is not barred from constraint validation and should be
+ affected by :-moz-ui-invalid pseudo-class. -->
+ <link rel='stylesheet' type='text/css' href='style.css'>
+ <script>
+ function onLoadHandler()
+ {
+ var e = document.getElementById('b');
+ e.setCustomValidity('foo');
+ document.documentElement.className='';
+ }
+ </script>
+ <body onload="onLoadHandler();">
+ <fieldset disabled>
+ <legend>
+ <button class='invalid' id='b'></button>
+ </legend>
+ </fieldset>
+ </body>
+</html>