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Test Info:

<!DOCTYPE html>
<html>
<!--
-->
<head>
<title>Test for Bug 1270235</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</script>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none;"></div>
<div id="edit1" contenteditable="true"><p>AB</p></div>
<script type="application/javascript">
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(() => {
let element = document.getElementById("edit1");
element.focus();
let textNode = element.firstChild.firstChild;
let node = textNode.splitText(0);
node.remove();
ok(!node.parentNode, "parent must be null");
let newRange = document.createRange();
newRange.setStart(node, 0);
newRange.setEnd(node, 0);
let selection = document.getSelection();
selection.removeAllRanges();
selection.addRange(newRange);
ok(selection.isCollapsed, "isCollapsed must be true");
// Don't crash by user input
sendString("X");
SimpleTest.finish();
});
</script>
</body>
</html>