<!doctype html>
<title>Origin check in document.open() - Basic usage</title>
<link rel="author" title="Jochen Eisinger" href="mailto:jochen@chromium.org">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#opening-the-input-stream">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/resources/common.js"></script>
<body>
<script>
testInIFrame(undefined, (ctx) => {
  try {
    ctx.iframes[0].contentDocument.open();
  } catch (e) {
    assert_unreached("Opening a same origin document throws");
  }
}, "It should be possible to open same origin documents.");

testInIFrame(undefined, (ctx) => {
  try {
    ctx.iframes[0].contentDocument.write("");
  } catch (e) {
    assert_unreached("Implicitly opening a same origin document throws");
  }
}, "It should be possible to implicitly open same origin documents.");
</script>
</body>
