returns-window-with-document.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /document-picture-in-picture/returns-window-with-document.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Test that documentPictureInPicture.requestWindow()

  returns a Window object</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<body>

  <div id="div"></div>

<script>

const div = document.getElementById('div');

async_test((t) => {

  test_driver.bless('request PiP window').then(t.step_func(_ => {

    documentPictureInPicture.requestWindow().then(t.step_func_done((pipWindow) => {

      assert_true(!!pipWindow.document,

          'Window should contain a document');

      assert_true(documentPictureInPicture.window === pipWindow,

          'DocumentPictureInPicture.window should match the current window');

      // We should be able to move an element to that document.

      assert_true(document.body.contains(div),

          'The original document should start with the div');

      assert_false(pipWindow.document.body.contains(div),

          'The PiP document should not start with the div');

      pipWindow.document.body.append(div);

      assert_false(document.body.contains(div),

          'The div should have moved away from the original document');

      assert_true(pipWindow.document.body.contains(div),

          'The div should have moved to the PiP document');

    }));

  }));

});

</script>

</body>