To require an additional gem in your plugin you should add a gem "gem-name" ... to your plugin.rb. But what if I need an additional gem during testing?
I only need it during test execution, so I do not want to add it to my plugin.rb.
I can’t do the same gem "gem-name" ... trick in the spec file or plugin_helper.rb, as that produces the error
Gem::LoadError:
rspec-collection_matchers is not part of the bundle. Add it to your Gemfile.
I want to add the rspec-collection_matchers gem. Sure I could work around it and produce less nice expectations. I am wondering if there is a construction which will allow me to include additional gems during testing.