Closes rails/rails#18864: Renaming transactional fixtures to transactional tests

I’m renaming all instances of `use_transcational_fixtures` to
`use_transactional_tests` and “transactional fixtures” to
“transactional tests”.

I’m deprecating `use_transactional_fixtures=`. So anyone who is
explicitly setting this will get a warning telling them to use
`use_transactional_tests=` instead.

I’m maintaining backwards compatibility—both forms will work.
`use_transactional_tests` will check to see if
`use_transactional_fixtures` is set and use that, otherwise it will use
itself. But because `use_transactional_tests` is a class attribute
(created with `class_attribute`) this requires a little bit of hoop
jumping. The writer method that `class_attribute` generates defines a
new reader method that return the value being set. Which means we can’t
set the default of `true` using `use_transactional_tests=` as was done
previously because that won’t take into account anyone using
`use_transactional_fixtures`. Instead I defined the reader method
manually and it checks `use_transactional_fixtures`. If it was set then
it should be used, otherwise it should return the default, which is
`true`. If someone uses `use_transactional_tests=` then it will
overwrite the backwards-compatible method with whatever they set.

7 files changed, 7 insertions, 7 deletions

diff --git a/activerecord/test/cases/adapters/postgresql/datatype_test.rb b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
index 4f48a7bce3..2c14252ae4 100644
--- a/activerecord/test/cases/adapters/postgresql/datatype_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
@@ -12,7 +12,7 @@ class PostgresqlLtree < ActiveRecord::Base
 end
 
 class PostgresqlDataTypeTest < ActiveRecord::TestCase
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   def setup
     @connection = ActiveRecord::Base.connection
diff --git a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
index 7b99fcdda0..06d427f464 100644
--- a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
@@ -1,7 +1,7 @@
 require "cases/helper"
 
 class PostgresqlExtensionMigrationTest < ActiveRecord::TestCase
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   class EnableHstore < ActiveRecord::Migration
     def change
diff --git a/activerecord/test/cases/adapters/postgresql/range_test.rb b/activerecord/test/cases/adapters/postgresql/range_test.rb
index b6b451ca5c..bbf96278b0 100644
--- a/activerecord/test/cases/adapters/postgresql/range_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/range_test.rb
@@ -7,7 +7,7 @@ if ActiveRecord::Base.connection.supports_ranges?
   end
 
   class PostgresqlRangeTest < ActiveRecord::TestCase
-    self.use_transactional_fixtures = false
+    self.use_transactional_tests = false
     include ConnectionHelper
 
     def setup
diff --git a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
index 71ee2d9bab..d76e762815 100644
--- a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
@@ -2,7 +2,7 @@ require 'cases/helper'
 require 'support/connection_helper'
 
 class PostgreSQLReferentialIntegrityTest < ActiveRecord::TestCase
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   include ConnectionHelper
 
diff --git a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
index 6937145439..359a45bbd1 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
@@ -4,7 +4,7 @@ class SchemaThing < ActiveRecord::Base
 end
 
 class SchemaAuthorizationTest < ActiveRecord::TestCase
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   TABLE_NAME = 'schema_things'
   COLUMNS = [
diff --git a/activerecord/test/cases/adapters/postgresql/schema_test.rb b/activerecord/test/cases/adapters/postgresql/schema_test.rb
index 77ff6d01bc..c1be340e7c 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_test.rb
@@ -3,7 +3,7 @@ require 'models/default'
 require 'support/schema_dumping_helper'
 
 class SchemaTest < ActiveRecord::TestCase
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   SCHEMA_NAME = 'test_schema'
   SCHEMA2_NAME = 'test_schema2'
diff --git a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
index da14063e20..a639f98272 100644
--- a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
@@ -5,7 +5,7 @@ require 'models/topic'
 class PostgresqlTimestampTest < ActiveRecord::TestCase
   class PostgresqlTimestampWithZone < ActiveRecord::Base; end
 
-  self.use_transactional_fixtures = false
+  self.use_transactional_tests = false
 
   setup do
     @connection = ActiveRecord::Base.connection