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

const makeSource = src => {
    const source = document.createElement("source");
    source.src = src;
    return source;
}

test(() => {
    assert_idl_attribute(document.createElement("model"), "currentSrc");
}, "The HTMLModelElement interface has a currentSrc property.");

test(() => {
    assert_readonly(document.createElement("model"), "currentSrc");
}, "The currentSrc property is read-only.");

test(() => {
    assert_equals(document.createElement("model").currentSrc, "");
}, "The currentSrc property is the empty string when no <source> is provided.");

test(() => {
    const model = document.createElement("model");
    model.appendChild(makeSource(""));
    assert_equals(model.currentSrc, "");
}, "The currentSrc property is the empty string when a <source> is provided with no src attribute.");

test(() => {
    const model = document.createElement("model");
    const source = model.appendChild(makeSource("model.usdz"));
    assert_equals(model.currentSrc, source.src);
}, "The currentSrc property is the empty string when a <source> is provided.");

test(() => {
    const model = document.createElement("model");
    const source = model.appendChild(makeSource(""));
    assert_equals(model.currentSrc, "");

    source.src = "model.usdz";
    assert_equals(model.currentSrc, source.src);
}, "Changing the src attribute of a <source> changes the currentSrc property.");

test(() => {
    const model = document.createElement("model");
    const source = model.appendChild(makeSource("model.usdz"));
    assert_equals(model.currentSrc, source.src);

    source.remove();
    assert_equals(model.currentSrc, "");
}, "Removing the <source> changes the currentSrc property.");

test(() => {
    const model = document.createElement("model");
    const firstSource = model.appendChild(makeSource("model-1.usdz"));
    const secondSource = model.appendChild(makeSource("model-2.usdz"));
    assert_equals(model.currentSrc, firstSource.src);
}, "currentSrc returns the src value for the first <source> element.");

test(() => {
    const model = document.createElement("model");
    const firstSource = model.appendChild(makeSource("model-1.usdz"));
    const secondSource = model.appendChild(makeSource("model-2.usdz"));
    assert_equals(model.currentSrc, firstSource.src);

    firstSource.remove();
    assert_equals(model.currentSrc, secondSource.src);
}, "Removing a <source> element updates currentSrc.");

test(() => {
    const model = document.createElement("model");
    const initialSource = model.appendChild(makeSource("model-initial.usdz"));
    assert_equals(model.currentSrc, initialSource.src);

    const secondSource = model.insertBefore(makeSource("model-initial.usdz"), initialSource);
    assert_equals(model.currentSrc, secondSource.src);
}, "Adding a <source> before the current <source> updates currentSrc.");

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