Test call RPC sync method print('test text')

Test call RPC sync method with callback param delayCallback(2000, function(){alert('delay callback invoked')})

Test call RPC sync method with nested param openDialog({onClosed: function(){alert('onClosed invoked')}})

Test call RPC async method which returns promise resolved with string promiseString(2000)

Test call RPC async method which returns promise rejected with error promiseRejected(2000)