require "cases/migration/helper"

module ActiveRecord
  class Migration
    class RenameTableTest < ActiveRecord::TestCase
      include ActiveRecord::Migration::TestHelper

      self.use_transactional_fixtures = false

      def setup
        super
        add_column 'test_models', :url, :string
        remove_column 'test_models', :created_at
        remove_column 'test_models', :updated_at
      end

      def teardown
        rename_table :octopi, :test_models if connection.table_exists? :octopi
        super
      end

      if current_adapter?(:SQLite3Adapter)
        def test_rename_table_for_sqlite_should_work_with_reserved_words
          renamed = false

          add_column :test_models, :url, :string
          connection.rename_table :references, :old_references
          connection.rename_table :test_models, :references

          renamed = true

          # Using explicit id in insert for compatibility across all databases
          connection.execute "INSERT INTO 'references' (url, created_at, updated_at) VALUES ('http://rubyonrails.com', 0, 0)"
          assert_equal 'http://rubyonrails.com', connection.select_value("SELECT url FROM 'references' WHERE id=1")
        ensure
          return unless renamed
          connection.rename_table :references, :test_models
          connection.rename_table :old_references, :references
        end
      end

      def test_rename_table
        rename_table :test_models, :octopi

        connection.execute "INSERT INTO octopi (#{connection.quote_column_name('id')}, #{connection.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')"

        assert_equal 'http://www.foreverflying.com/octopus-black7.jpg', connection.select_value("SELECT url FROM octopi WHERE id=1")
      end

      def test_rename_table_with_an_index
        add_index :test_models, :url

        rename_table :test_models, :octopi

        connection.execute "INSERT INTO octopi (#{connection.quote_column_name('id')}, #{connection.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')"

        assert_equal 'http://www.foreverflying.com/octopus-black7.jpg', connection.select_value("SELECT url FROM octopi WHERE id=1")
        index = connection.indexes(:octopi).first
        assert index.columns.include?("url")
        assert_equal 'index_octopi_on_url', index.name
      end

      def test_rename_table_does_not_rename_custom_named_index
        add_index :test_models, :url, name: 'special_url_idx'

        rename_table :test_models, :octopi

        assert_equal ['special_url_idx'], connection.indexes(:octopi).map(&:name)
      end

      if current_adapter?(:PostgreSQLAdapter)
        def test_rename_table_for_postgresql_should_also_rename_default_sequence
          rename_table :test_models, :octopi

          pk, seq = connection.pk_and_sequence_for('octopi')

          assert_equal ConnectionAdapters::PostgreSQL::Name.new("public", "octopi_#{pk}_seq"), seq
        end

        def test_renaming_table_doesnt_attempt_to_rename_non_existent_sequences
          enable_extension!('uuid-ossp', connection)
          connection.create_table :cats, id: :uuid
          assert_nothing_raised { rename_table :cats, :felines }
          assert connection.table_exists? :felines
        ensure
          disable_extension!('uuid-ossp', connection)
          connection.drop_table :cats if connection.table_exists? :cats
          connection.drop_table :felines if connection.table_exists? :felines
        end
      end
    end
  end
end