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chromium/third_party/blink/web_tests/fast/dom/Range/range-constructor.html 

<!DOCTYPE html>
<script src="../../../resources/js-test.js"></script>
<div id="test-div">Test</div>
<script>

description('Tests that we can create instances of Range using new');

shouldBe('typeof new Range', '"object"');
shouldBe('Object.prototype.toString.call(new Range)', '"[object Range]"');
shouldBeTrue('new Range instanceof Range');
shouldBe('Object.getPrototypeOf(new Range)', 'Range.prototype');

var r = new Range();
r.selectNodeContents(document.getElementById('test-div'));
shouldBe('r.toString()', '"Test"')

var frame = document.createElement('iframe');
document.body.appendChild(frame);
var innerWindow = frame.contentWindow;
var innerDocument = frame.contentDocument;
innerDocument.body.textContent = 'Inner';

shouldBeTrue('new innerWindow.Range instanceof innerWindow.Range');
shouldBe('Object.getPrototypeOf(new innerWindow.Range)', 'innerWindow.Range.prototype');

var r = new innerWindow.Range();
r.selectNodeContents(innerDocument.body);
shouldBe('r.toString()', '"Inner"');

</script>