Fix some issues from a recent PR

lib/temporal_tables/temporal_adapter.rb

@@ -74,7 +74,7 @@ def remove_temporal_table(table_name)
       return unless table_exists?(temporal_name(table_name))
 
       drop_temporal_triggers table_name
-      drop_table temporal_name(table_name)
+      drop_table_without_temporal temporal_name(table_name)
     end
 
     def drop_table(table_name, **options)

spec/support/database.rb

@@ -1,43 +1,43 @@
 # frozen_string_literal: true
 
-def adapter_name
-  if Gemika::Env.gem?('pg')
-    'postgresql'
-  elsif Gemika::Env.gem?('mysql2')
-    'mysql'
-  else
-    raise 'Cannot determine adapter'
-  end
-end
-
-def table_exists?(name)
-  ActiveRecord::Base.connection.table_exists?(name)
-end
+module TemporalTables
+  module DatabaseAdapter
+    def adapter_name
+      if Gemika::Env.gem?('pg')
+        'postgresql'
+      elsif Gemika::Env.gem?('mysql2')
+        'mysql'
+      else
+        raise 'Cannot determine adapter'
+      end
+    end
 
-def function_exists?(name)
-  case adapter_name
-  when 'postgresql'
-    begin
-      ActiveRecord::Base.connection.execute("select(pg_get_functiondef('#{name}'::regprocedure))").present?
-    rescue ActiveRecord::StatementInvalid
-      false
+    def function_exists?(name)
+      case adapter_name
+      when 'postgresql'
+        begin
+          ActiveRecord::Base.connection.execute("select(pg_get_functiondef('#{name}'::regprocedure))").present?
+        rescue ActiveRecord::StatementInvalid
+          false
+        end
+      when 'mysql' then raise NotImplementedError
+      else raise "Unknown adapter #{adapter_name}"
+      end
     end
-  when 'mysql' then raise NotImplementedError
-  else raise "Unknown adapter #{adapter_name}"
-  end
-end
 
-def trigger_exists?(name) # rubocop:disable Metrics/MethodLength
-  case adapter_name
-  when 'postgresql'
-    ActiveRecord::Base.connection.execute(
-      "select (pg_get_triggerdef(oid)) FROM pg_trigger WHERE tgname = '#{name}'"
-    ).first.present?
-  when 'mysql'
-    ActiveRecord::Base.connection.execute(
-      'SHOW TRIGGERS FROM temporal_tables_test'
-    ).find { |row| row.first == name }.present?
-  else
-    raise "Unknown adapter #{adapter_name}"
+    def trigger_exists?(name) # rubocop:disable Metrics/MethodLength
+      case adapter_name
+      when 'postgresql'
+        ActiveRecord::Base.connection.execute(
+          "select (pg_get_triggerdef(oid)) FROM pg_trigger WHERE tgname = '#{name}'"
+        ).first.present?
+      when 'mysql'
+        ActiveRecord::Base.connection.execute(
+          'SHOW TRIGGERS FROM temporal_tables_test'
+        ).find { |row| row.first == name }.present?
+      else
+        raise "Unknown adapter #{adapter_name}"
+      end
+    end
   end
 end