You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dbtask_test.rb
    path of file: ./repos/secondbase/test/cases
    
    the code of the file until where you have to start completion: require 'test_helper'

class DbTaskTest < SecondBase::TestCase

  def test_db_create
    
    
  def test_db_purge_all
    skip 'Rails 4.2 & Up' unless rails_42_up?
    run_db :create
    run_db :migrate
    assert_dummy_databases
    run_db 'purge:all'
    establish_connection
    assert_no_tables
  end