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Development Setup

Generally speaking, you only need to clone the project and install the dependencies with Bundler. You can either get a full RSpec development environment using rspec-dev or you can set this project up individually.

Setting up rspec-mocks individually

For most contributors, setting up the project individually will be simpler. Unless you have a specific reason to use rspec-dev, we recommend using this approach.

Clone the repo:

$ git clone git@github.com:rspec/rspec-mocks.git

Install the dependencies using Bundler:

$ cd rspec-mocks
$ bundle install

To minimize boot time and to ensure we don't depend upon any extra dependencies loaded by Bundler, our CI builds avoid loading Bundler at runtime by using Bundler's --standalone option. While not strictly necessary (many/most of our contributors do not do this!), if you want to exactly reproduce our CI builds you'll want to do the same:

$ bundle install --standalone --binstubs

The --binstubs option creates the bin/rspec file that, like bundle exec rspec, will load all the versions specified in Gemfile.lock without loading bundler at runtime!

Using rspec-dev

See the rspec-dev README for setup instructions.

The rspec-dev project contains many rake tasks for helping manage an RSpec development environment, making it easy to do things like:

  • Change branches across all repos
  • Update all repos with the latest code from main
  • Cut a new release across all repos
  • Push out updated build scripts to all repos

These sorts of tasks are essential for the RSpec maintainers but will probably be unnecessary complexity if you're just contributing to one repository. If you are getting setup to make your first contribution, we recommend you take the simpler route of setting up rspec-mocks individually.

Gotcha: Version mismatch from sibling repos

The Gemfile is designed to be flexible and support using the other RSpec repositories either from a local sibling directory (e.g. ../rspec-<subproject>) or, if there is no such directory, directly from git. This generally does the "right thing", but can be a gotcha in some situations. For example, if you are setting up rspec-core, and you happen to have an old clone of rspec-expectations in a sibling directory, it'll be used even though it might be months or years out of date, which can cause confusing failures.

To avoid this problem, you can either export USE_GIT_REPOS=1 to force the use of :git dependencies instead of local dependencies, or update the code in the sibling directory. rspec-dev contains rake tasks to help you keep all repos in sync.

Extra Gems

If you need additional gems for any tasks---such as benchmark-ips for benchmarking or byebug for debugging---you can create a Gemfile-custom file containing those gem declarations. The Gemfile evaluates that file if it exists, and it is git-ignored.

Running the build

The Travis CI build runs many verification steps to prevent regressions and ensure high-quality code. To run the Travis build locally, run:

$ script/run_build

See build detail for more detail.

What to Expect

To ensure high, uniform code quality, all code changes (including changes from the maintainers!) are subject to a pull request code review. We'll often ask for clarification or suggest alternate ways to do things. Our code reviews are intended to be a two-way conversation.

Here's a short, non-exhaustive checklist of things we typically ask contributors to do before PRs are ready to merge. It can help get your PR merged faster if you do these in advance!

  • New behavior is covered by tests and all tests are passing.
  • No Ruby warnings are issued by your changes.
  • Documentation reflects changes and renders as intended.
  • RuboCop passes (e.g. bundle exec rubocop lib).
  • Commits are squashed into a reasonable number of logical changesets that tell an easy-to-follow story.
  • No changelog entry is necessary (we'll add it as part of the merge process!)

Adding Docs

RSpec uses YARD for its API documentation. To ensure the docs render well, we recommend running a YARD server and viewing your edits in a browser.

To run a YARD server:

$ bundle exec yard server --reload

# or, if you installed your bundle with `--standalone --binstubs`:

$ bin/yard server --reload

Then navigate to localhost:8808 to view the rendered docs.