LayoutTests/spatial-css/spatial-portal-multi-model-source-change.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/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 portal = createPortal(t);
    const changing = appendModel(portal, "cube.usdz");
    const untouched = appendModel(portal, "cube.usdz");
    await Promise.all([changing.ready, untouched.ready]);

    const untouchedReadyBeforeChange = untouched.ready;
    changing.querySelector("source").src = "../model-element/resources/2x2x2-center.usdz";
    await changing.ready;

    assert_equals(untouched.ready, untouchedReadyBeforeChange, "the sibling's ready promise was not reset");
    await untouched.ready;
    assert_equals(internals.modelElementState(changing), "Loaded", "the re-sourced model is loaded");
    assert_equals(internals.modelElementState(untouched), "Loaded", "its sibling is still loaded");
}, "Changing the source of one <model> in a spatial portal leaves its sibling loaded");

promise_test(async t => {
    const portal = createPortal(t);
    const unloading = appendModel(portal, "cube.usdz");
    const untouched = appendModel(portal, "cube.usdz");
    await Promise.all([unloading.ready, untouched.ready]);

    const unloadingReadyBeforeChange = unloading.ready;
    const untouchedReadyBeforeChange = untouched.ready;
    const errored = new Promise(resolve => unloading.addEventListener("error", resolve, { once: true }));

    unloading.querySelector("source").remove();
    await errored;

    assert_not_equals(unloading.ready, unloadingReadyBeforeChange, "the unsourced model's ready promise was replaced");
    assert_equals(untouched.ready, untouchedReadyBeforeChange, "the sibling's ready promise was not reset");
    assert_equals(internals.numberOfHostedModelsInSpatialPortal(portal), 2, "the unsourced model stays registered with the portal");
    assert_equals(internals.modelElementState(unloading), "Deferred", "the unsourced model has nothing to load");
    assert_equals(internals.modelElementState(untouched), "Loaded", "only the sibling is still loaded");
    await untouched.ready;
}, "Clearing the source of one <model> in a spatial portal unloads only that model");

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