ALERT: Hello World
Tests Page.javascriptDialogOpening event
Page.javascriptDialogOpening: {
    method : Page.javascriptDialogOpening
    params : {
        defaultPrompt :
        frameId : <string>
        hasBrowserHandler : true
        message : Hello World
        type : alert
        url : http://127.0.0.1:8000/inspector-protocol/resources/inspector-protocol-page.html
    }
    sessionId : <string>
}
Page.javascriptDialogOpening has expected frameId
Page.javascriptDialogClosed: {
    method : Page.javascriptDialogClosed
    params : {
        frameId : <string>
        result : true
        userInput :
    }
    sessionId : <string>
}
Page.javascriptDialogClosed has expected frameId