<!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="xpathExpressionTestRoot"></div>

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

promise_test(async t => {
    window.__xpathExpression0Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const thunk = iframe.contentWindow.createThunkWithCallableResolver("__xpathExpression0Calls__");

    thunk(document, xpathExpressionTestRoot);
    assert_equals(window.__xpathExpression0Calls__, 1);
}, "Callable callback interface, originated in an <iframe>, is invoked if <iframe> is connected");

promise_test(async t => {
    window.__xpathExpression1Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const thunk = iframe.contentWindow.createThunkWithCallableResolver("__xpathExpression1Calls__", Function);

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

    thunk(document, xpathExpressionTestRoot);
    assert_equals(window.__xpathExpression1Calls__, 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.__xpathExpression2Calls__ = 0;
    const iframe = await createIframe(t, IFRAME_SRC);
    const thunk = iframe.contentWindow.createThunkWithCallableResolver("__xpathExpression2Calls__");

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

    assert_throws(() => { thunk(document, xpathExpressionTestRoot); });
    assert_equals(window.__xpathExpression2Calls__, 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 thunk = iframe.contentWindow.createThunkWithNonCallableResolver0("__nodeFilter3Calls__");

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

    assert_throws(() => { thunk(document, xpathExpressionTestRoot); });
    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 thunk = iframe.contentWindow.createThunkWithNonCallableResolver1("__nodeFilter4Calls__", iframe);

    assert_throws(() => { thunk(document, xpathExpressionTestRoot); });
    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 thunk = iframe.contentWindow.createThunkWithNonCallableResolver2();

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

    thunk(document, xpathExpressionTestRoot);
    assert_equals(thunk.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>