warning: instance variable not initialized

Steps to reproduce

Simply running RSpec with Apartment without setting connection_class or persistent_schemas explicitly.

Expected behavior

To have no warning show up in the specs output.

Actual behavior

A lot of warnings stating that

.../lib/apartment.rb:66: warning: instance variable @connection_class not initialized
.../lib/apartment.rb:62: warning: instance variable @persistent_schemas not initialized

System configuration

Database: PG v10 and pg gem v1.1.4
Apartment version: 2.2.1
Rails (or ActiveRecord) version: 6.0.0
Ruby version: 2.5.6

Personal note

That's not really a surprise as the connection_class and persistent_schemas methods are defined in a way that would indeed raise this warning if the variables are not already set.

If you're open to it I'd be happy to make a PR that assigns those variables to the default values that are returned.

❤️

Update: this PR is a duplicate of #538 that was closed. Update 2: My current workaround is to set the following in spec_helper.rb:

Apartment.configure do |config|
  config.connection_class = ActiveRecord::Base
  config.persistent_schemas = []
end

influitive / apartment