<!DOCTYPE html>
<meta charset="utf-8">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/callback-function-detached-frame-common.js"></script>

<body>

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

<script>
const IFRAME_SRC = "resources/callback-interface-detached-frame-node-filter-iframe.html";

promise_test(async t => {
    window.__nodeFilter0Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithCallableFilter("__nodeFilter0Calls__");

    assert_equals(nodeIterator.nextNode(), nodeIteratorTestRoot);
    assert_equals(window.__nodeFilter0Calls__, 1);
}, "Callable callback interface, originated in an <iframe>, is invoked if <iframe> is connected");

promise_test(async t => {
    window.__nodeFilter1Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithCallableFilter("__nodeFilter1Calls__", Function);

    iframe.remove();
    assert_equals(iframe.contentWindow, null);

    assert_equals(nodeIterator.nextNode(), nodeIteratorTestRoot);
    assert_equals(window.__nodeFilter1Calls__, 1);
}, "Callable callback interface, originated in an <iframe> via main window's Function constructor, is invoked even if <iframe> is disconnected");

promise_test(async t => {
    window.__nodeFilter2Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithCallableFilter("__nodeFilter2Calls__");

    iframe.remove();
    assert_equals(iframe.contentWindow, null);

    assert_throws(() => { nodeIterator.nextNode(); });
    assert_equals(window.__nodeFilter2Calls__, 0);
}, "Callable callback interface, originated in an <iframe>, is not invoked if <iframe> is disconnected");

promise_test(async t => {
    window.__nodeFilter3Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithNonCallableFilter0("__nodeFilter3Calls__");

    iframe.remove();
    assert_equals(iframe.contentWindow, null);

    assert_throws(() => { nodeIterator.nextNode(); });
    assert_equals(window.__nodeFilter3Calls__, 0);
}, "Non-callable callback interface, originated in an <iframe> via object literal, is not invoked if <iframe> is disconnected even if its 'acceptNode' method is of main window");

promise_test(async t => {
    window.__nodeFilter4Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithNonCallableFilter1("__nodeFilter4Calls__", iframe);

    assert_throws(() => { nodeIterator.nextNode(); });
    assert_equals(iframe.contentWindow, null);
    assert_equals(window.__nodeFilter4Calls__, 0);
}, "Non-callable callback interface, originated in an <iframe> via object literal, is not invoked even if <iframe> is disconnected during 'acceptNode' lookup");

promise_test(async t => {
    const iframe = await createIframe(t, IFRAME_SRC);
    const nodeIterator = iframe.contentWindow.createNodeIteratorWithNonCallableFilter2();

    iframe.remove();
    assert_equals(iframe.contentWindow, null);

    assert_equals(nodeIterator.nextNode(), nodeIteratorTestRoot);
    assert_equals(nodeIterator.callbackInvocations, 1);
}, "Non-callable callback interface, originated in an <iframe> via main window's Object constructor, is invoked if <iframe> is disconnected even if its 'acceptNode' method is of the <iframe>");

function assert_throws(fn) {
    let caughtError = false;
    try { fn(); } catch { caughtError = true; }
    assert_true(caughtError, "assert_throws");
}
</script>