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+<!doctype html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=719518
+-->
+<title>Test for Bug 719518</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=719518">Mozilla Bug 719518</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test">
+<script>
+var thrown = false;
+try {
+ getSelection().extend(document.body, 0);
+} catch(e) {
+ thrown = true;
+ is(e.name, "InvalidStateError",
+ "Need to throw InvalidStateError for extend() with no ranges");
+ ok(e instanceof DOMException,
+ "Need to throw DOMException for extend() with no ranges");
+ is(e.code, DOMException.INVALID_STATE_ERR,
+ "Need to throw INVALID_STATE_ERR for extend() with no ranges");
+}
+ok(thrown, "Need to throw exception for extend() with no ranges");
+</script>