This gem is intended to be installed locally.
./rails_app $ mkdir -p ./gems
./rails_app $ cd ./gems
./rails_app/gems $ git clone https://github.com/amrani/common_testing.git
Bundle and remove git.
./host_app/gems $ cd ./common_testing
./host_app/gems/common_testing $ rm -rf .git
./host_app/gems/common_testing $ bundle install
For adding it to a rails engine:
# engines/my_engine/Gemfile
group :development, :test do
gem "common_testing", path: "../../gems/common_testing"
end
# engines/my_engine/my_engine.gemspec
spec.add_development_dependency "common_testing"