<!DOCTYPE HTML>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
<script src="./resources/paint-api-utils.js"></script>
</head>
<body>
<div class="spacer"></div>
    <iframe width="100" height="100" id="nonSandboxed" src="./resources/fcp-subframe.html"></iframe>
<div class="spacer"></div>
<iframe id="sandboxed" src="./resources/fcp-subframe.html" sandbox="allow-scripts"></iframe>
<div class="spacer"></div>

    TEXT

<script>
description("Paint API should be available for same-origin frames but not to cross-origin/sandboxed frames.");
window.jsTestIsAsync = true;
window.didReceiveMessage = false;

window.onload = async () => {
    const sandboxed = document.getElementById('sandboxed');
    const nonSandboxed = document.getElementById('nonSandboxed');
    const fcpMessagePromise = new Promise(resolve => {
        window.onmessage = event => {
            window.receivedEvent = event;
            const isFromSandboxed = event.source === sandboxed.contentWindow;
            const message = JSON.parse(event.data);
            switch (message.type) {
                case 'supported':
                    if (isFromSandboxed)
                        window.sandboxSupportedTypes = message.supported;
                    else
                        window.nonSandboxSupportedTypes = message.supported;
                    break;
                case 'received':
                    window.didReceiveMessageFromSandboxedIframe = isFromSandboxed;
                    window.receivedEntry = message.entry;
                    didReceiveMessage = true;
                    shouldBe('receivedEvent.source', "document.getElementById('nonSandboxed').contentWindow");
                    shouldBe('receivedEntry.name', "'first-contentful-paint'");
                    resolve();
                    break;
            }
        };
    });

    sandboxed.contentWindow.postMessage("paint", "*");
    await waitForFCP();
    nonSandboxed.contentWindow.postMessage("paint", "*");
    await waitForFCP();
    await fcpMessagePromise;
    shouldBeFalse('didReceiveMessageFromSandboxedIframe');
    shouldBeTrue('Array.isArray(nonSandboxSupportedTypes)');
    shouldBeTrue('Array.isArray(sandboxSupportedTypes)');
    shouldBeTrue('didReceiveMessage');
    shouldBeTrue('nonSandboxSupportedTypes.includes("paint")');
    shouldBeFalse('sandboxSupportedTypes.includes("paint")');
    testPassed("PerformanceObserver first-contentful-paint callback was fired for same-origin frame but not for cross-origin frame");
    finishJSTest();
};


</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>