is it possible to run all specs that are affected by differences between feature branch and master?

[tansaku]

I've been enjoying being able to run rubocop only on changes in my feature branch, and I was wondering if there was a way to run only specs affected by changes in my feature branch ...?

I'm not a fan of spec runs kicking off when I save - I'd like to be able to control when they start, but detect the set of specs that are influenced in my current feature branch ...

[pocheptsov]

@tansaku that's what https://github.com/toptal/crystalball is helping to do, you can automate its start with cmd option like:

guard :rspec, cmd: 'bundle exec crystalball' do
...
end