module Shared
  module TopAddition
    def setup
      (1..4).each { |counter| TopAdditionMixin.create! :pos => counter, :parent_id => 5 }
    end

    def test_reordering
      assert_equal [4, 3, 2, 1], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(2).move_lower
      assert_equal [4, 3, 1, 2], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(2).move_higher
      assert_equal [4, 3, 2, 1], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(1).move_to_bottom
      assert_equal [4, 3, 2, 1], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(1).move_to_top
      assert_equal [1, 4, 3, 2], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(2).move_to_bottom
      assert_equal [1, 4, 3, 2], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(4).move_to_top
      assert_equal [4, 1, 3, 2], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
    end

    def test_injection
      item = TopAdditionMixin.new(:parent_id => 1)
      assert_equal '"mixins"."parent_id" = 1', item.scope_condition
      assert_equal "pos", item.position_column
    end

    def test_insert
      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos
      assert new.first?
      assert new.last?

      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos
      assert new.first?
      assert !new.last?

      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos
      assert new.first?
      assert !new.last?

      new = TopAdditionMixin.create(:parent_id => 0)
      assert_equal 1, new.pos
      assert new.first?
      assert new.last?
    end

    def test_insert_at
      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos

      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos

      new = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new.pos

      new4 = TopAdditionMixin.create(:parent_id => 20)
      assert_equal 1, new4.pos

      new4.insert_at(3)
      assert_equal 3, new4.pos
    end

    def test_delete_middle
      assert_equal [4, 3, 2, 1], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      TopAdditionMixin.find(2).destroy

      assert_equal [4, 3, 1], TopAdditionMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)

      assert_equal 3, TopAdditionMixin.find(1).pos
      assert_equal 2, TopAdditionMixin.find(3).pos
      assert_equal 1, TopAdditionMixin.find(4).pos
    end

  end
end