third_party/web_platform_tests/selection/selectAllChildren.html

<!doctype html>
<title>Selection.selectAllChildren tests</title>
<div id=log></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=common.js></script>
<script>
"use strict";

testRanges.unshift("[]");

for (var i = 0; i < testRanges.length; i++) {
    var endpoints = eval(testRanges[i]);

    for (var j = 0; j < testNodes.length; j++) {
        var node = eval(testNodes[j]);

        test(function() {
            setSelectionForwards(endpoints);
            var originalRange = getSelection().rangeCount
                ? getSelection().getRangeAt(0)
                : null;

            if (node.nodeType == Node.DOCUMENT_TYPE_NODE) {
                assert_throws("INVALID_NODE_TYPE_ERR", function() {
                    selection.selectAllChildren(node);
                }, "selectAllChildren() on a DocumentType must throw InvalidNodeTypeError");
                return;
            }

            selection.selectAllChildren(node);
            // This implicitly tests that the selection is forwards, by using
            // anchorOffset/focusOffset instead of getRangeAt.
            assert_equals(selection.rangeCount, 1,
                "After selectAllChildren, rangeCount must be 1");
            assert_equals(selection.anchorNode, node,
                "After selectAllChildren, anchorNode must be the given node");
            assert_equals(selection.anchorOffset, 0,
                "After selectAllChildren, anchorOffset must be 0");
            assert_equals(selection.focusNode, node,
                "After selectAllChildren, focusNode must be the given node");
            assert_equals(selection.focusOffset, node.childNodes.length,
                "After selectAllChildren, focusOffset must be the given node's number of children");
            if (originalRange) {
                assert_not_equals(getSelection().getRangeAt(0), originalRange,
                    "selectAllChildren must replace any existing range, not mutate it");
            }
        }, "Range " + i + " " + testRanges[i] + ", node " + j + " " + testNodes[j]);
    }
}

testDiv.style.display = "none";
</script>