react-native how to get deviceSize on jest

I am writing a test code on responsiveStyles but I am in trouble because I don't know how to get device width by Jest(testCode)

Xcode Simlulator is quite do well reponsiveStyles but Jest Code isn't changed while device is changed

export const deviceWidth = Dimensions.get('window').width / PixelRatio.get();
export const devieceHeight = Dimensions.get('window').height / PixelRatio.get();