rails--rails/activerecord/test/cases/disconnected_test.rb

require "cases/helper"

class TestRecord < ActiveRecord::Base
end

class TestDisconnectedAdapter < ActiveRecord::TestCase
  self.use_transactional_fixtures = false

  def setup
    @connection = ActiveRecord::Base.connection
  end

  teardown do
    return if in_memory_db?
    spec = ActiveRecord::Base.connection_config
    ActiveRecord::Base.establish_connection(spec)
  end

  unless in_memory_db?
    test "can't execute statements while disconnected" do
      @connection.execute "SELECT count(*) from products"
      @connection.disconnect!
      assert_raises(ActiveRecord::StatementInvalid) do
        @connection.execute "SELECT count(*) from products"
      end
    end
  end
end