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palemoon27/testing/web-platform/tests/dom/nodes/CharacterData-insertData.html
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HTML

<!DOCTYPE html>
<meta charset=utf-8>
<title>CharacterData.insertData</title>
<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-insertdata">
<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-data">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
function testNode(node) {
test(function() {
assert_throws("INDEX_SIZE_ERR", function() { node.insertData(5, "x") })
assert_throws("INDEX_SIZE_ERR", function() { node.insertData(5, "") })
node.insertData(2, "X")
assert_equals(node.data, "teXst")
})
test(function() {
node.data = "test"
assert_equals(node.data, "test")
node.insertData(4, "ing")
assert_equals(node.data, "testing")
})
}
test(function() {
testNode(document.createTextNode("test"))
testNode(document.createComment("test"))
})
</script>