Module: Structure::ClassMethods

Defined in:
lib/structure/double.rb,
lib/structure/class_methods.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#attribute_names ⇒ Object (readonly)

Returns an array of attribute names as strings



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# File 'lib/structure/class_methods.rb', line 6

def attribute_names
  @attribute_names
end

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/structure/class_methods.rb', line 8

def self.extended(base)
  base.instance_variable_set :@attribute_names, []
  base.send :__overwrite_initialize
end

Instance Method Details

#attribute(name, &block) ⇒ Object 



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# File 'lib/structure/class_methods.rb', line 13

def attribute(name, &block)
  name = name.to_s

  if name.end_with?('?')
    name = name.chop
    module_eval "      def \#{name}?\n        \#{name}\n      end\n    CODE\n  end\n\n  module_eval <<-CODE, __FILE__, __LINE__ + 1\n    def \#{name}\n      @__mutex.synchronize {\n        break if @__table.key?(\"\#{name}\")\n\n        @__table[\"\#{name}\"] = __\#{name}\n        @__table[\"\#{name}\"].freeze\n\n        @__table[\"\#{name}\"]\n      }\n\n      @__table[\"\#{name}\"]\n    end\n  CODE\n\n  define_method \"__\#{name}\", block\n  private \"__\#{name}\"\n\n  @attribute_names << name\n\n  name.to_sym\nend\n", __FILE__, __LINE__ + 1

#double ⇒ Object

Creates a double that mocks a value object built with Structure during a test

The double has an alternative constructor that takes a hash to set values. Otherwise, it shares the public API of the mocked value object.



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# File 'lib/structure/double.rb', line 10

def double
  klass = Class.new(self)

  (private_instance_methods(false) + protected_instance_methods(false) -
    [:initialize]).each do |name|
    klass.send :undef_method, name
  end

  klass.module_eval do
    def initialize(values = {})
      values.each do |key, value|
        instance_variable_set :"@#{key}", value
      end
    end

    attribute_names.each do |name|
      module_eval "        private def __\#{name}\n          @\#{name}\n        end\n      CODE\n    end\n\n    module_eval(&Proc.new) if block_given?\n  end\n\n  class << klass\n    undef_method :double\n  end\n\n  klass\nend\n", __FILE__, __LINE__ + 1