activerecord/test/cases/connection_adapters/connection_handler_test.rb


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require "cases/helper"

module ActiveRecord
  module ConnectionAdapters
    class ConnectionHandlerTest < ActiveRecord::TestCase
      def setup
        @klass    = Class.new(Base)   { def self.name; 'klass';    end }
        @subklass = Class.new(@klass) { def self.name; 'subklass'; end }

        @handler = ConnectionHandler.new
        @pool    = @handler.establish_connection(@klass, Base.connection_pool.spec)
      end

      def test_retrieve_connection
        assert @handler.retrieve_connection(@klass)
      end

      def test_active_connections?
        assert !@handler.active_connections?
        assert @handler.retrieve_connection(@klass)
        assert @handler.active_connections?
        @handler.clear_active_connections!
        assert !@handler.active_connections?
      end

      def test_retrieve_connection_pool_with_ar_base
        assert_nil @handler.retrieve_connection_pool(ActiveRecord::Base)
      end

      def test_retrieve_connection_pool
        assert_not_nil @handler.retrieve_connection_pool(@klass)
      end

      def test_retrieve_connection_pool_uses_superclass_when_no_subclass_connection
        assert_not_nil @handler.retrieve_connection_pool(@subklass)
      end

      def test_retrieve_connection_pool_uses_superclass_pool_after_subclass_establish_and_remove
        sub_pool = @handler.establish_connection(@subklass, Base.connection_pool.spec)
        assert_same sub_pool, @handler.retrieve_connection_pool(@subklass)

        @handler.remove_connection @subklass
        assert_same @pool, @handler.retrieve_connection_pool(@subklass)
      end

      def test_connection_pools
        assert_equal([@pool], @handler.connection_pools)
      end
    end
  end
end