IdentityMap - misc fixes

- Added IdentityMap to be included into AR::Base
- Fixed bug with Mysql namespace missing when running tests only for sqlite
- Added sqlite as default connection

2 files changed, 9 insertions, 2 deletions

diff --git a/activerecord/test/cases/adapters/mysql/connection_test.rb b/activerecord/test/cases/adapters/mysql/connection_test.rb
index 62ffde558f..eb3f8143e7 100644
--- a/activerecord/test/cases/adapters/mysql/connection_test.rb
+++ b/activerecord/test/cases/adapters/mysql/connection_test.rb
@@ -102,7 +102,7 @@ class MysqlConnectionTest < ActiveRecord::TestCase
   end
 
   # Test that MySQL allows multiple results for stored procedures
-  if Mysql.const_defined?(:CLIENT_MULTI_RESULTS)
+  if defined?(Mysql) && Mysql.const_defined?(:CLIENT_MULTI_RESULTS)
     def test_multi_results
       rows = ActiveRecord::Base.connection.select_rows('CALL ten();')
       assert_equal 10, rows[0][0].to_i, "ten() did not return 10 as expected: #{rows.inspect}"
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index 52f26b71f5..d80e2734ce 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -11,7 +11,14 @@ require 'mocha'
 
 require 'active_record'
 require 'active_support/dependencies'
-require 'connection'
+begin
+  require 'connection'
+rescue LoadError
+  # If we cannot load connection we assume that driver was not loaded for this test case, so we load sqlite3 as default one.
+  # This allows for running separate test cases by simply running test file.
+  connection_type = defined?(JRUBY_VERSION) ? 'jdbc' : 'native'
+  require "test/connections/#{connection_type}_sqlite3/connection"
+end
 
 begin
   require 'ruby-debug'