LayoutTests/spatial-css/spatial-portal-multi-model-move.html

<!DOCTYPE html> <!-- webkit-test-runner [ SpatialPortalEnabled=true ModelElementEnabled=true allowTestOnlyIPC=true ] -->
<html>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script src="../resources/ui-helper.js"></script>
<script src="resources/spatial-portal-utils.js"></script>
<style>
    .portal { spatial: portal; width: 300px; height: 150px; }
</style>
<body>
<script>
'use strict';

window.internals?.disableModelLoadDelaysForTesting();

promise_test(async t => {
    const portalA = createPortal(t);
    const portalB = createPortal(t);

    const staying = appendModel(portalA, "cube.usdz");
    const moving = appendModel(portalA, "cube.usdz");
    await Promise.all([staying.ready, moving.ready]);
    assert_equals(internals.numberOfHostedModelsInSpatialPortal(portalA), 2, "portal A hosts both models");

    portalB.appendChild(moving);
    await UIHelper.ensureStablePresentationUpdate();

    assert_equals(internals.numberOfHostedModelsInSpatialPortal(portalA), 1, "portal A still hosts the model that stayed");
    assert_equals(internals.numberOfHostedModelsInSpatialPortal(portalB), 1, "portal B hosts the moved model");
}, "Moving one of two <model>s out of a spatial portal leaves its sibling hosted");

</script>
</body>
</html>