Move load_schema from Object to AR::TestCase

as its instance and class mathod

activerecord/test/cases/helper.rb

@@ -27,27 +27,6 @@ QUOTED_TYPE = ActiveRecord::Base.connection.quote_column_name("type")
 ActiveRecord.raise_on_assign_to_attr_readonly = true
 ActiveRecord.belongs_to_required_validates_foreign_key = false
 
-def load_schema
-  # silence verbose schema loading
-  original_stdout = $stdout
-  $stdout = StringIO.new
-
-  adapter_name = ActiveRecord::Base.connection.adapter_name.downcase
-  adapter_specific_schema_file = SCHEMA_ROOT + "/#{adapter_name}_specific_schema.rb"
-
-  load SCHEMA_ROOT + "/schema.rb"
-
-  if File.exist?(adapter_specific_schema_file)
-    load adapter_specific_schema_file
-  end
-
-  ActiveRecord::FixtureSet.reset_cache
-ensure
-  $stdout = original_stdout
-end
-
-load_schema
-
 class SQLSubscriber
   attr_reader :logged
   attr_reader :payloads

activerecord/test/cases/test_case.rb

@@ -11,6 +11,7 @@ require "cases/validations_repair_helper"
 require_relative "../support/config"
 require_relative "../support/connection"
 require_relative "../support/adapter_helper"
+require_relative "../support/load_schema_helper"
 
 module ActiveRecord
   # = Active Record Test Case
@@ -23,6 +24,8 @@ module ActiveRecord
     include ActiveRecord::ValidationsRepairHelper
     include AdapterHelper
     extend AdapterHelper
+    include LoadSchemaHelper
+    extend LoadSchemaHelper
 
     self.fixture_path = FIXTURES_ROOT
     self.use_instantiated_fixtures = false
@@ -225,6 +228,8 @@ module ActiveRecord
 
     # Connect to the database
     ARTest.connect
+    # Load database schema
+    load_schema
   end
 
   class PostgreSQLTestCase < TestCase

activerecord/test/support/load_schema_helper.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module LoadSchemaHelper
+  def load_schema
+    # silence verbose schema loading
+    original_stdout = $stdout
+    $stdout = StringIO.new
+
+    adapter_name = ActiveRecord::Base.connection.adapter_name.downcase
+    adapter_specific_schema_file = SCHEMA_ROOT + "/#{adapter_name}_specific_schema.rb"
+
+    load SCHEMA_ROOT + "/schema.rb"
+
+    if File.exist?(adapter_specific_schema_file)
+      load adapter_specific_schema_file
+    end
+
+    ActiveRecord::FixtureSet.reset_cache
+  ensure
+    $stdout = original_stdout
+  end
+end