Module: Simplecheck

Defined in:
lib/simplecheck.rb,
lib/simplecheck/version.rb,
lib/simplecheck/check_failed.rb

Defined Under Namespace

Classes: CheckFailed

Constant Summary collapse

VERSION = 
'2.0'

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.check_arguments(arguments) ⇒ Object 



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# File 'lib/simplecheck.rb', line 15

def self.check_arguments(arguments)
  case arguments.size
  when 1
    check_expression(arguments[0])
  else
    check_case_equality(*arguments)
  end
end

.check_arguments_with_block(arguments, block) ⇒ Object 



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# File 'lib/simplecheck.rb', line 24

def self.check_arguments_with_block(arguments, block)
  check_arguments(arguments + [block])
end

.check_case_equality(*arguments, check_argument) ⇒ Object 



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# File 'lib/simplecheck.rb', line 32

def self.check_case_equality(*arguments, check_argument)
  invalid_argument_index = arguments.index{ |argument| !(check_argument === argument) }

  if invalid_argument_index
    "#{ arguments[invalid_argument_index] } does not satisfy #{ check_argument }"
  end
end

.check_expression(expression_satisfied) ⇒ Object 



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# File 'lib/simplecheck.rb', line 28

def self.check_expression(expression_satisfied)
  'Condition is not satisfied' unless expression_satisfied
end

.handle_failure(message) ⇒ Object 



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# File 'lib/simplecheck.rb', line 40

def self.handle_failure(message)
  fail(Simplecheck::CheckFailed, message)
end

Instance Method Details

#check(*arguments, error_message: nil, &block) ⇒ Object 



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# File 'lib/simplecheck.rb', line 5

def check(*arguments, error_message: nil, &block)
  default_error_message = if block_given?
                            Simplecheck.check_arguments_with_block(arguments, block)
                          else
                            Simplecheck.check_arguments(arguments)
                          end
  
  default_error_message ?  Simplecheck.handle_failure(error_message || default_error_message) : true
end