extract BaseHelper from ActiveRecord spec helpers.

spec/support/active_record/base_helper.rb

@@ -0,0 +1,32 @@
+require 'support/active_record/database_setup'
+require 'support/active_record/schema_setup'
+
+class BaseHelper
+  # require 'logger'
+  # ActiveRecord::Base.logger = Logger.new(STDERR)
+
+  def setup
+    create_db
+    establish_connection
+    active_record_load_schema
+  end
+
+  def migrate
+    ActiveRecord::Migrator.migrate 'spec/support/active_record/migrations'
+  end
+
+  def connection
+    ActiveRecord::Base.connection
+  end
+
+  def teardown
+    ActiveRecord::Base.connection.drop_database default_config['database']
+  end
+
+  private
+
+  def establish_connection(config = default_config)
+    ActiveRecord::Base.establish_connection(config)
+  end
+end
+

spec/support/active_record/mysql2_helper.rb

@@ -1,25 +1,11 @@
-require 'support/active_record/database_setup'
-require 'support/active_record/schema_setup'
+require 'support/active_record/base_helper'
 
-class MySQL2Helper
+class MySQL2Helper < BaseHelper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, mysql2"
 
-  # require 'logger'
-  # ActiveRecord::Base.logger = Logger.new(STDERR)
-
   def setup
     patch_mysql2_adapter
-    create_db
-    establish_connection
-    active_record_load_schema
-  end
-
-  def connection
-    ActiveRecord::Base.connection
-  end
-
-  def teardown
-    ActiveRecord::Base.connection.drop_database default_config['database']
+    super
   end
 
   private
@@ -35,10 +21,6 @@ class MySQL2Helper
     ActiveRecord::Base.connection.create_database default_config['database']
   end
 
-  def establish_connection(config = default_config)
-    ActiveRecord::Base.establish_connection config
-  end
-
   def patch_mysql2_adapter
     # remove DEFAULT NULL from column definition, which is an error on primary keys in MySQL 5.7.3+
     ActiveRecord::ConnectionAdapters::Mysql2Adapter::NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY"

spec/support/active_record/mysql_helper.rb

@@ -1,24 +1,11 @@
-require 'support/active_record/database_setup'
-require 'support/active_record/schema_setup'
+require 'support/active_record/base_helper'
 
-class MySQLHelper
+class MySQLHelper < BaseHelper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, mysql"
 
-  # require 'logger'
-  # ActiveRecord::Base.logger = Logger.new(STDERR)
-
   def setup
     patch_mysql_adapter
-    create_db
-    active_record_load_schema
-  end
-
-  def connection
-    ActiveRecord::Base.connection
-  end
-
-  def teardown
-    ActiveRecord::Base.connection.drop_database default_config['database']
+    super
   end
 
   private

spec/support/active_record/postgresql_helper.rb

@@ -1,25 +1,8 @@
-require 'support/active_record/database_setup'
-require 'support/active_record/schema_setup'
+require 'support/active_record/base_helper'
 
-class PostgreSQLHelper
+class PostgreSQLHelper < BaseHelper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, pg"
 
-  # ActiveRecord::Base.logger = Logger.new(STDERR)
-
-  def setup
-    create_db
-    establish_connection
-    active_record_load_schema
-  end
-
-  def migrate
-    ActiveRecord::Migrator.migrate 'spec/support/active_record/migrations'
-  end
-
-  def connection
-    ActiveRecord::Base.connection
-  end
-
   def teardown
     ActiveRecord::Base.connection.execute "DROP TABLE users, agents;"
   rescue ActiveRecord::StatementInvalid
@@ -37,9 +20,5 @@ class PostgreSQLHelper
     ActiveRecord::Base.connection.create_database(default_config['database'], default_config.merge('encoding' => @encoding))
   rescue ActiveRecord::StatementInvalid
   end
-
-  def establish_connection(config = default_config)
-    ActiveRecord::Base.establish_connection(config)
-  end
 end
 

spec/support/active_record/sqlite3_helper.rb

@@ -1,21 +1,8 @@
-require 'support/active_record/database_setup'
-require 'support/active_record/schema_setup'
+require 'support/active_record/base_helper'
 
-class SQLite3Helper
+class SQLite3Helper < BaseHelper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, sqlite3"
 
-  # ActiveRecord::Base.logger = Logger.new(STDERR)
-
-  def setup
-    create_db
-    establish_connection
-    active_record_load_schema
-  end
-
-  def connection
-    ActiveRecord::Base.connection
-  end
-
   def teardown
     ActiveRecord::Base.connection.truncate_table('users')
     ActiveRecord::Base.connection.truncate_table('agents')
@@ -31,9 +18,5 @@ class SQLite3Helper
     @encoding = default_config['encoding'] || ENV['CHARSET'] || 'utf8'
     establish_connection(default_config.merge('database' => 'sqlite3', 'schema_search_path' => 'public'))
   end
-
-  def establish_connection(config = default_config)
-    ActiveRecord::Base.establish_connection(config)
-  end
 end