third_party/web_platform_tests/selection/isCollapsed.html

<!doctype html>
<title>Selection.isCollapsed 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";

test(function() {
    selection.removeAllRanges();
    assert_true(selection.isCollapsed, "isCollapsed must be true if both anchor and focus are null");
}, "Empty selection");

for (var i = 0; i < testRanges.length; i++) {
    test(function() {
        selection.removeAllRanges();
        var endpoints = eval(testRanges[i]);
        var range = ownerDocument(endpoints[0]).createRange();
        range.setStart(endpoints[0], endpoints[1]);
        range.setEnd(endpoints[2], endpoints[3]);
        selection.addRange(range);

        assert_equals(selection.isCollapsed,
            endpoints[0] === endpoints[2] && endpoints[1] === endpoints[3],
            "Value of isCollapsed");
    }, "Range " + i + " " + testRanges[i]);
}

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