fails:File.umask return a Fixnum
fails:File.umask invokes to_int on non-integer argument
fails:File.umask always succeeds with any integer values
fails:File.umask raises ArgumentError when more than one argument is provided
fails:File.umask Returns the current umask value for this process. (basic)
fails:File.umask Returns the current umask value for this process.
fails:File.umask raises an exception if the arguments are wrong type or are the incorect number of arguments 
fails:File.umask raises an exception if the arguments are wrong type or are the incorect number of arguments 
fails:File.umask raises an exception if the arguments are wrong type or are the incorect number of arguments 
fails:File.umask raises an exception if the arguments are wrong type or are the incorect number of arguments 
