Add test for RubyEnumerable::entries
Add test for RubyEnumerable::find
Add test for RubyEnumerable::findAll
Add test for RunyEnumerable::findIndex
Add test for RubyEnumerable::first
Add test for RubyEnumerable::flatMap
Add test for RubyEnumerable::grep
Add test for RubyEnumerable::groupBy
Add test for RubyEnumerable::include?
Add test for RubyEnumerable::inject