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chromium/third_party/blink/web_tests/fast/dom/Window/window-open-invalid-url.html 

<!doctype html>
<title>window.open: invalid URL</title>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script>
  test(() => {
      assert_throws_dom("SyntaxError", () => { self.open("http:"); });
  }, "Check that window.open() throws on an invalid URL.");
</script>