activerecord/test/cases/attribute_methods/read_test.rb


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require "cases/helper"

module ActiveRecord
  module AttributeMethods
    class ReadTest < ActiveRecord::TestCase
      class FakeColumn < Struct.new(:name)
        def type_cast_code(var)
          var
        end

        def type; :integer; end
      end

      def setup
        @klass = Class.new do
          include ActiveRecord::AttributeMethods
          include ActiveRecord::AttributeMethods::Read

          def self.column_names
            %w{ one two three }
          end

          def self.primary_key
          end

          def self.columns
            column_names.map { FakeColumn.new(name) }
          end

          def self.columns_hash
            Hash[column_names.map { |name|
              [name, FakeColumn.new(name)]
            }]
          end

          def self.serialized_attributes; {}; end
        end
      end

      def test_define_attribute_methods
        instance = @klass.new

        @klass.column_names.each do |name|
          assert ! instance.methods.map(&:to_s).include?(name)
        end

        @klass.define_attribute_methods

        @klass.column_names.each do |name|
          assert(instance.methods.map(&:to_s).include?(name), "#{name} is not defined")
        end
      end

      def test_attribute_methods_generated?
        assert(!@klass.attribute_methods_generated?, 'attribute_methods_generated?')
        @klass.define_attribute_methods
        assert(@klass.attribute_methods_generated?, 'attribute_methods_generated?')
      end
    end
  end
end