Chris@909: require 'test/unit'
Chris@909: 
Chris@909: require 'rubygems'
Chris@909: require 'active_record'
Chris@909: 
Chris@909: $:.unshift File.dirname(__FILE__) + '/../lib'
Chris@909: require File.dirname(__FILE__) + '/../init'
Chris@909: 
Chris@909: class Test::Unit::TestCase
Chris@909:   def assert_queries(num = 1)
Chris@909:     $query_count = 0
Chris@909:     yield
Chris@909:   ensure
Chris@909:     assert_equal num, $query_count, "#{$query_count} instead of #{num} queries were executed."
Chris@909:   end
Chris@909: 
Chris@909:   def assert_no_queries(&block)
Chris@909:     assert_queries(0, &block)
Chris@909:   end
Chris@909: end
Chris@909: 
Chris@909: ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :dbfile => ":memory:")
Chris@909: 
Chris@909: # AR keeps printing annoying schema statements
Chris@909: $stdout = StringIO.new
Chris@909: 
Chris@909: def setup_db
Chris@909:   ActiveRecord::Base.logger
Chris@909:   ActiveRecord::Schema.define(:version => 1) do
Chris@909:     create_table :mixins do |t|
Chris@909:       t.column :type, :string
Chris@909:       t.column :parent_id, :integer
Chris@909:     end
Chris@909:   end
Chris@909: end
Chris@909: 
Chris@909: def teardown_db
Chris@909:   ActiveRecord::Base.connection.tables.each do |table|
Chris@909:     ActiveRecord::Base.connection.drop_table(table)
Chris@909:   end
Chris@909: end
Chris@909: 
Chris@909: class Mixin < ActiveRecord::Base
Chris@909: end
Chris@909: 
Chris@909: class TreeMixin < Mixin 
Chris@909:   acts_as_tree :foreign_key => "parent_id", :order => "id"
Chris@909: end
Chris@909: 
Chris@909: class TreeMixinWithoutOrder < Mixin
Chris@909:   acts_as_tree :foreign_key => "parent_id"
Chris@909: end
Chris@909: 
Chris@909: class RecursivelyCascadedTreeMixin < Mixin
Chris@909:   acts_as_tree :foreign_key => "parent_id"
Chris@909:   has_one :first_child, :class_name => 'RecursivelyCascadedTreeMixin', :foreign_key => :parent_id
Chris@909: end
Chris@909: 
Chris@909: class TreeTest < Test::Unit::TestCase
Chris@909:   
Chris@909:   def setup
Chris@909:     setup_db
Chris@909:     @root1 = TreeMixin.create!
Chris@909:     @root_child1 = TreeMixin.create! :parent_id => @root1.id
Chris@909:     @child1_child = TreeMixin.create! :parent_id => @root_child1.id
Chris@909:     @root_child2 = TreeMixin.create! :parent_id => @root1.id
Chris@909:     @root2 = TreeMixin.create!
Chris@909:     @root3 = TreeMixin.create!
Chris@909:   end
Chris@909: 
Chris@909:   def teardown
Chris@909:     teardown_db
Chris@909:   end
Chris@909: 
Chris@909:   def test_children
Chris@909:     assert_equal @root1.children, [@root_child1, @root_child2]
Chris@909:     assert_equal @root_child1.children, [@child1_child]
Chris@909:     assert_equal @child1_child.children, []
Chris@909:     assert_equal @root_child2.children, []
Chris@909:   end
Chris@909: 
Chris@909:   def test_parent
Chris@909:     assert_equal @root_child1.parent, @root1
Chris@909:     assert_equal @root_child1.parent, @root_child2.parent
Chris@909:     assert_nil @root1.parent
Chris@909:   end
Chris@909: 
Chris@909:   def test_delete
Chris@909:     assert_equal 6, TreeMixin.count
Chris@909:     @root1.destroy
Chris@909:     assert_equal 2, TreeMixin.count
Chris@909:     @root2.destroy
Chris@909:     @root3.destroy
Chris@909:     assert_equal 0, TreeMixin.count
Chris@909:   end
Chris@909: 
Chris@909:   def test_insert
Chris@909:     @extra = @root1.children.create
Chris@909: 
Chris@909:     assert @extra
Chris@909: 
Chris@909:     assert_equal @extra.parent, @root1
Chris@909: 
Chris@909:     assert_equal 3, @root1.children.size
Chris@909:     assert @root1.children.include?(@extra)
Chris@909:     assert @root1.children.include?(@root_child1)
Chris@909:     assert @root1.children.include?(@root_child2)
Chris@909:   end
Chris@909: 
Chris@909:   def test_ancestors
Chris@909:     assert_equal [], @root1.ancestors
Chris@909:     assert_equal [@root1], @root_child1.ancestors
Chris@909:     assert_equal [@root_child1, @root1], @child1_child.ancestors
Chris@909:     assert_equal [@root1], @root_child2.ancestors
Chris@909:     assert_equal [], @root2.ancestors
Chris@909:     assert_equal [], @root3.ancestors
Chris@909:   end
Chris@909: 
Chris@909:   def test_root
Chris@909:     assert_equal @root1, TreeMixin.root
Chris@909:     assert_equal @root1, @root1.root
Chris@909:     assert_equal @root1, @root_child1.root
Chris@909:     assert_equal @root1, @child1_child.root
Chris@909:     assert_equal @root1, @root_child2.root
Chris@909:     assert_equal @root2, @root2.root
Chris@909:     assert_equal @root3, @root3.root
Chris@909:   end
Chris@909: 
Chris@909:   def test_roots
Chris@909:     assert_equal [@root1, @root2, @root3], TreeMixin.roots
Chris@909:   end
Chris@909: 
Chris@909:   def test_siblings
Chris@909:     assert_equal [@root2, @root3], @root1.siblings
Chris@909:     assert_equal [@root_child2], @root_child1.siblings
Chris@909:     assert_equal [], @child1_child.siblings
Chris@909:     assert_equal [@root_child1], @root_child2.siblings
Chris@909:     assert_equal [@root1, @root3], @root2.siblings
Chris@909:     assert_equal [@root1, @root2], @root3.siblings
Chris@909:   end
Chris@909: 
Chris@909:   def test_self_and_siblings
Chris@909:     assert_equal [@root1, @root2, @root3], @root1.self_and_siblings
Chris@909:     assert_equal [@root_child1, @root_child2], @root_child1.self_and_siblings
Chris@909:     assert_equal [@child1_child], @child1_child.self_and_siblings
Chris@909:     assert_equal [@root_child1, @root_child2], @root_child2.self_and_siblings
Chris@909:     assert_equal [@root1, @root2, @root3], @root2.self_and_siblings
Chris@909:     assert_equal [@root1, @root2, @root3], @root3.self_and_siblings
Chris@909:   end           
Chris@909: end
Chris@909: 
Chris@909: class TreeTestWithEagerLoading < Test::Unit::TestCase
Chris@909:   
Chris@909:   def setup 
Chris@909:     teardown_db
Chris@909:     setup_db
Chris@909:     @root1 = TreeMixin.create!
Chris@909:     @root_child1 = TreeMixin.create! :parent_id => @root1.id
Chris@909:     @child1_child = TreeMixin.create! :parent_id => @root_child1.id
Chris@909:     @root_child2 = TreeMixin.create! :parent_id => @root1.id
Chris@909:     @root2 = TreeMixin.create!
Chris@909:     @root3 = TreeMixin.create!
Chris@909:     
Chris@909:     @rc1 = RecursivelyCascadedTreeMixin.create!
Chris@909:     @rc2 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc1.id 
Chris@909:     @rc3 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc2.id
Chris@909:     @rc4 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc3.id
Chris@909:   end
Chris@909: 
Chris@909:   def teardown
Chris@909:     teardown_db
Chris@909:   end
Chris@909:     
Chris@909:   def test_eager_association_loading
Chris@909:     roots = TreeMixin.find(:all, :include => :children, :conditions => "mixins.parent_id IS NULL", :order => "mixins.id")
Chris@909:     assert_equal [@root1, @root2, @root3], roots                     
Chris@909:     assert_no_queries do
Chris@909:       assert_equal 2, roots[0].children.size
Chris@909:       assert_equal 0, roots[1].children.size
Chris@909:       assert_equal 0, roots[2].children.size
Chris@909:     end   
Chris@909:   end
Chris@909:   
Chris@909:   def test_eager_association_loading_with_recursive_cascading_three_levels_has_many
Chris@909:     root_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :children => { :children => :children } }, :order => 'mixins.id')
Chris@909:     assert_equal @rc4, assert_no_queries { root_node.children.first.children.first.children.first }
Chris@909:   end
Chris@909:   
Chris@909:   def test_eager_association_loading_with_recursive_cascading_three_levels_has_one
Chris@909:     root_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :first_child => { :first_child => :first_child } }, :order => 'mixins.id')
Chris@909:     assert_equal @rc4, assert_no_queries { root_node.first_child.first_child.first_child }
Chris@909:   end
Chris@909:   
Chris@909:   def test_eager_association_loading_with_recursive_cascading_three_levels_belongs_to
Chris@909:     leaf_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :parent => { :parent => :parent } }, :order => 'mixins.id DESC')
Chris@909:     assert_equal @rc1, assert_no_queries { leaf_node.parent.parent.parent }
Chris@909:   end 
Chris@909: end
Chris@909: 
Chris@909: class TreeTestWithoutOrder < Test::Unit::TestCase
Chris@909:   
Chris@909:   def setup                               
Chris@909:     setup_db
Chris@909:     @root1 = TreeMixinWithoutOrder.create!
Chris@909:     @root2 = TreeMixinWithoutOrder.create!
Chris@909:   end
Chris@909: 
Chris@909:   def teardown
Chris@909:     teardown_db
Chris@909:   end
Chris@909: 
Chris@909:   def test_root
Chris@909:     assert [@root1, @root2].include?(TreeMixinWithoutOrder.root)
Chris@909:   end
Chris@909:   
Chris@909:   def test_roots
Chris@909:     assert_equal [], [@root1, @root2] - TreeMixinWithoutOrder.roots
Chris@909:   end
Chris@909: end