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chromium/third_party/blink/web_tests/external/wpt/html/browsers/browsing-the-web/navigating-across-documents/005.html 

<!doctype html>
<title>Link with onclick navigation and href navigation </title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<iframe id="test" name="test"></iframe>
<a target="test" onclick="document.getElementById('test').contentWindow.location='resources/click.html'" href="resources/href.html">Test</a>
<script>
var t = async_test();
t.step(function() {document.links[0].click()});
onmessage = t.step_func(
  function(e) {
    assert_equals(e.data, "href");
    t.done();
  });
</script>