Method: Contract.failure_msg

Defined in:
lib/contracts.rb

.failure_msg(data) ⇒ Object

Given a hash, prints out a failure message. This function is used by the default #failure_callback method and uses the hash passed into the failure_callback method.



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# File 'lib/contracts.rb', line 147

def self.failure_msg(data)
  expected = Contracts::Formatters::Expected.new(data[:contract]).contract
  position = Contracts::Support.method_position(data[:method])
  method_name = Contracts::Support.method_name(data[:method])

  header = if data[:return_value]
             "Contract violation for return value:"
           else
             "Contract violation for argument #{data[:arg_pos]} of #{data[:total_args]}:"
           end

  %{#{header}
      Expected: #{expected},
      Actual: #{data[:arg].inspect}
      Value guarded in: #{data[:class]}::#{method_name}
      With Contract: #{data[:contracts]}
      At: #{position} }
end