LayoutTests/model-element/model-element-inline-preview-deletion-upon-source-change.html

<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script src="resources/model-utils.js"></script>
<script>

promise_test(async test => {
    assert_own_property(window, "internals", "This test only work within the WebKit testing environment.");

    // First, we load a <model> with an existing resource.
    const model = await readyModel(test);
    const uuid = window.internals.modelInlinePreviewUUIDForModelElement(model);
    const initialUUIDS = await window.internals.modelInlinePreviewUUIDs();
    assert_true(initialUUIDS.includes(uuid), "The UUID for the model matches one of the remote previews.");
    
    // Then, we unload it by setting a non-existent resource.
    model.textContent = "";
    const updatedUUIDS = await window.internals.modelInlinePreviewUUIDs();
    assert_false(updatedUUIDS.includes(uuid), "The UUID for the model is no longer present in the list of remote previews.");
}, "Changing a <model> resource should clear any associated remote preview.");

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