gistfile1.txt

      # Creates a mock object instance for a +model_class+ with common
      # methods stubbed out. Additional methods may be easily stubbed (via
      # add_stubs) if +stubs+ is passed.
      def mock_model(model_class, options_and_stubs = {})
        id = options_and_stubs[:id] || next_id
        options_and_stubs = options_and_stubs.reverse_merge({
          :id => id,
          :to_param => id.to_s,
          :new_record? => false,
          :errors => stub("errors", :count => 0)
        })
        m = mock("#{model_class.name}_#{id}", options_and_stubs)
        m.send(:__mock_proxy).instance_eval <<-CODE
          def @target.as_new_record
            self.stub!(:id).and_return nil
            self.stub!(:to_param).and_return nil
            self.stub!(:new_record?).and_return true
            self
          end
          def @target.is_a?(other)
            #{model_class}.ancestors.include?(other)
          end
          def @target.kind_of?(other)
            #{model_class}.ancestors.include?(other)
          end
          def @target.instance_of?(other)
            other == #{model_class}
          end
          def @target.class
            #{model_class}
          end
        CODE
        yield m if block_given?
        m
      end