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Test Info:

<meta charset=utf-8>
<title>Selection: Add a range to the selection</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
window.onload = function() {
test(function() {
var selection = window.getSelection();
var p = document.querySelector("p");
var range = document.createRange();
// In Safari the anchorNode is the Text node, elsewhere it's the Element.
assert_equals(selection.anchorNode, document.body);
assert_equals(selection.anchorOffset, 1);
assert_equals(selection.focusNode, document.body);
assert_equals(selection.focusOffset, 2);
assert_equals(selection.isCollapsed, range.collapsed);
assert_equals(selection.rangeCount, 1);
<p>Add a range to the selection</p>