chromium/third_party/blink/web_tests/netinfo/web-worker.html

<!DOCTYPE html>
<head>
<script src="../resources/js-test.js"></script>
<script src="resources/netinfo_common.js"></script>
</head>
<body>
<script>

description('Tests that web-workers have access to NetInfo.');

shouldBe('typeof internals.observeGC', '"function"',
'this test requires window.internals');

var worker = new Worker("resources/web-worker.js");

var msg_count = 0;

worker.addEventListener('message', function(e) {
    if (msg_count == 0) {
        verifyOnChangeMessage(e.data, connection.type,
            connection.downlinkMax, connection.effectiveType,
            connection.rtt, connection.downlink);
        internals.setNetworkConnectionInfoOverride(isTypeOnline(newConnectionType), newConnectionType,initialEffectiveType, initialRtt, newDownlinkMax);
    } else if (msg_count == 1) {
        verifyOnChangeMessage(e.data, newConnectionType, newDownlinkMax,
            connection.effectiveType, connection.rtt, connection.downlink);
        internals.setNetworkConnectionInfoOverride(isTypeOnline(initialType), initialType, initialEffectiveType, initialRtt, initialDownlinkMax);
    } else if (msg_count == 2) {
        verifyOnChangeMessage(e.data, initialType, initialDownlinkMax,
            connection.effectiveType, connection.rtt, connection.downlink);
        finishJSTest();
    }
    msg_count += 1;
});

worker.postMessage('kickoff');
</script>
</body>
</html>