Method: Spec::Expectations.fail_with

Defined in:
lib/spec/expectations.rb

.fail_with(message, expected = nil, target = nil) ⇒ Object

raises a Spec::Expectations::ExpectationNotMetError with message

When a differ has been assigned and fail_with is passed expected and target, passes them to the differ to append a diff message to the failure message.



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# File 'lib/spec/expectations.rb', line 46

def self.fail_with(message, expected=nil, target=nil) # :nodoc:
  if Array === message && message.length == 3
    message, expected, target = message[0], message[1], message[2]
  end
  unless (differ.nil? || expected.nil? || target.nil?)
    if expected.is_a?(String)
      message << "\nDiff:" << self.differ.diff_as_string(target.to_s, expected)
    elsif !target.is_a?(Proc)
      message << "\nDiff:" << self.differ.diff_as_object(target, expected)
    end
  end
  Kernel::raise(Spec::Expectations::ExpectationNotMetError.new(message))
end