how to write a junit using mockito for this method alogorithm?

Hi I am tryint to write a junit using mockito for the below algorithm. can you please help me.

public void setOrientation(Activity activity) {
    Get the DisplayMetrics for the phone;
    calculate the screen size;
    get configurations;
    
    if (diagonalInches>=6.5 && tablet connected to hard keyboard){
        set screen orientation
    }
}