<!-- webkit-test-runner [ UsesBackForwardCache=true ] -->
<!DOCTYPE html>
<html>
<head>
<script src="/js-test-resources/js-test.js"></script>
</head>
<body>
<script>
description("Tests that a page with an EventSource that is connected can enter the PageCache.");
jsTestIsAsync = true;

let restoredFromPageCache = false;
let openEventCount = 0;
let errorEventCount = 0;
let shouldNavigateOnMessage = true;

window.addEventListener("pageshow", function(event) {
    debug("pageshow - " + (event.persisted ? "" : "not ") + "from cache");

    if (event.persisted) {
        testPassed("Page did enter and was restored from the page cache");
        restoredFromPageCache = true;
    }
}, false);

window.addEventListener("pagehide", function(event) {
    debug("pagehide - " + (event.persisted ? "" : "not ") + "entering cache");
    if (!event.persisted) {
        testFailed("Page did not enter the page cache.");
        finishJSTest();
    }
}, false);

onload = () => {
    setTimeout(() => {
       eventSource = new EventSource("resources/infinite-event-stream.py");

        eventSource.onerror = () => {
            testPassed("Received error event");
            errorEventCount++;
            shouldBeTrue("restoredFromPageCache");
            shouldBe("openEventCount", "1");
        }

        eventSource.onopen = () => {
            testPassed("Received open event");
            openEventCount++;
        }

        eventSource.onmessage = () => {
            if (shouldNavigateOnMessage) {
                shouldNavigateOnMessage = false;
                testPassed("Received message before entering page cache");
                setTimeout(() => {
                    window.location = "/navigation/resources/page-cache-helper.html";
                }, 0);
                return;
            }
            if (!restoredFromPageCache)
                return;

            testPassed("Received message after restoring from page cache");
            shouldBe("openEventCount", "2");
            shouldBe("errorEventCount", "1");
            finishJSTest();
        }
    }, 0);
}

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