Class: UseCase::PreConditionFailure

Inherits:
Object
  • Object
show all
Defined in:
lib/use_case/outcome.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pre_condition) ⇒ PreConditionFailure

Returns a new instance of PreConditionFailure.



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# File 'lib/use_case/outcome.rb', line 75

def initialize(pre_condition); @pre_condition = pre_condition; end

Instance Attribute Details

#pre_condition ⇒ Object (readonly)

Returns the value of attribute pre_condition.



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# File 'lib/use_case/outcome.rb', line 74

def pre_condition
  @pre_condition
end

Instance Method Details

#otherwise {|@pre_condition| ... } ⇒ Object

Yields:



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# File 'lib/use_case/outcome.rb', line 85

def otherwise(&block)
  @otherwise = true
  yield(@pre_condition) if !@called
end

#symbol ⇒ Object 



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# File 'lib/use_case/outcome.rb', line 90

def symbol
  return @pre_condition.symbol if @pre_condition.respond_to?(:symbol)
  klass = @pre_condition.class
  return klass.symbol if klass.respond_to?(:symbol)
  klass.name.gsub(/([^A-Z])([A-Z])/, '\1_\2').gsub(/[:_]+/, "_").downcase.to_sym
end

#when(symbol, &block) ⇒ Object

Raises:

  • (Exception) 


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# File 'lib/use_case/outcome.rb', line 77

def when(symbol, &block)
  raise Exception.new("Cannot call when after otherwise") if @otherwise
  if symbol == self.symbol
    @called = true
    yield(@pre_condition)
  end
end