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<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title><div> with role columnheader; inherited supported state or property "aria-expanded"
value of "undefined"
</title>
</head>
<body>
<div role="grid">
<div role="row">
<span id="test" role="columnheader" aria-expanded="undefined">Placeholder content</span>
<span role="columnheader">header 2</span>
<span role="columnheader">header 3</span>
</div>
<div role="row">
<span role="gridcell" id="obj1">obj1</span>
<span role="gridcell">obj2</span>
<span role="gridcell">obj3</span>
</div>
<div role="row">
<span role="gridcell">obj1</span>
<span role="gridcell">obj2</span>
<span role="gridcell">obj3</span>
</div>
<div role="row">
<span role="gridcell">obj1</span>
<span role="gridcell">obj2</span>
<span role="gridcell">obj3</span>
</div>
</div>
</body>
</html>