module RbNaCl::Util

def check_length(string, length, description)

Parameters:
  • description (String) -- Description of the string (used in the error)
  • length (Integer) -- The desired length
  • string (String) -- The string to compare

Raises:
  • (RbNaCl::LengthError) - If the string is not the right length 
def check_length(string, length, description)
  if string.nil?
    # code below is runs only in test cases
    # nil can't be converted to str with #to_str method
    raise LengthError,
          "#{description} was nil (Expected #{length.to_int})",
          caller
  end
  if string.bytesize != length.to_int
    raise LengthError,
          "#{description} was #{string.bytesize} bytes (Expected #{length.to_int})",
          caller
  end
  true
end