Module: Mutest::Util Private

Defined in:
lib/mutest/util.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Utility methods

Constant Summary collapse

SizeError =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Error raised by ‘Util.one` if size is less than zero or greater than one

Class.new(IndexError)

Class Method Summary collapse

Class Method Details

.one(array) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return only element in array if it contains exactly one member

Parameters:

  • array (Array)

Returns:

  • (Object) —

    first entry

Raises:



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# File 'lib/mutest/util.rb', line 12

def self.one(array)
  return array.first if array.one?

  raise SizeError, "expected size to be exactly 1 but size was #{array.size}"
end