fixed tests

Author: Circuit8

lib/active_record/connection_adapters/sqlserver/schema_creation.rb

@@ -3,7 +3,7 @@
 module ActiveRecord
   module ConnectionAdapters
     module SQLServer
-      BASE_SCHEMA_CREATION_CLASS = Rails::VERSION::MAJOR >= 6 && Rails::VERSION::MINOR >= 1 ?
+      BASE_SCHEMA_CREATION_CLASS = ((ActiveRecord.version <=> Gem::Version.new("6.1")) != -1) ?
         SchemaCreation :
         AbstractAdapter::SchemaCreation
 

lib/active_record/connection_adapters/sqlserver/transaction.rb

@@ -31,7 +31,7 @@ def current_isolation_level
     module SQLServerRealTransaction
       attr_reader :starting_isolation_level
 
-      if Rails::VERSION::MAJOR >= 6 && Rails::VERSION::MINOR >= 1
+      if (ActiveRecord.version <=> Gem::Version.new("6.1")) != -1
         def initialize(connection, **args)
           @connection = connection
           @starting_isolation_level = current_isolation_level if args[:isolation]