LayoutTests/ipc/start-message-testing.html

<!DOCTYPE html><!-- webkit-test-runner [ IPCTestingAPIEnabled=true ] -->
<body>
<script>
if (window.testRunner)
    testRunner.dumpAsText();

var driverName = {type: "String", value: "default"};

function stop() {
    if (window.IPC) {
        IPC.sendSyncMessage("GPU", 0, IPC.messages.IPCTester_StopMessageTesting.name, []);
        IPC.sendSyncMessage("Networking", 0, IPC.messages.IPCTester_StopMessageTesting.name, []);
        IPC.sendSyncMessage("UI", 0, IPC.messages.IPCTester_StopMessageTesting.name, []);
        console.log("stopped");
    }
    if (window.testRunner)
        testRunner.notifyDone();
}

if (window.IPC) {
    IPC.sendMessage("GPU", 0, IPC.messages.IPCTester_StartMessageTesting.name, [driverName]);
    IPC.sendMessage("Networking", 0, IPC.messages.IPCTester_StartMessageTesting.name, [driverName]);
    IPC.sendMessage("UI", 0, IPC.messages.IPCTester_StartMessageTesting.name, [driverName]);
    console.log("started");
}
setTimeout(stop, 3000);

</script>
<p>Test passes if it does not crash.</p>
</body>
</html>