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A Ruby library for testing your library against different versions of dependencies.
| Date | Stars |
|---|---|
| 2026-07-24 | 1324 |
| 2026-07-25 | 1324 |
| 2026-07-28 | 1324 |
| 2026-07-30 | 1324 |
| 2026-08-06 | 1324 |
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Appraisal
=========
Find out what your Ruby gems are worth.
Synopsis
--------
Appraisal integrates with bundler and rake to test your library against
different versions of dependencies in repeatable scenarios called "appraisals."
Appraisal is designed to make it easy to check for regressions in your library
without interfering with day-to-day development using Bundler.
Installation
------------
In your package's `.gemspec`:
s.add_development_dependency "appraisal"
Note that gems must be bundled in the global namespace. Bundling gems to a
local location or vendoring plugins is not supported. If you do not want to
pollute the global namespace, one alternative is
[RVM's Gemsets](http://rvm.io/gemsets).
Setup
-----
Setting up appraisal requires an `Appraisals` file (similar to a `Gemfile`) in
your project root, named "Appraisals" (note the case), and some slight changes
to your project's `Rakefile`.
An `Appraisals` file consists of several appraisal definitions. An appraisal
definition is simply a list of gem dependencies. For example, to test with a
few versions of Rails:
appraise "rails-3" do
gem "rails", "3.2.14"
end
appraise "rails-4" do
gem "rails", "4.0.0"
end
The dependencies in your `Appraisals` file are combined with dependencies in
your `Gemfile`, so you don't need to repeat anything that's the same for each
appraisal. If something is specified in both the Gemfile and an appraisal, the
version from the appraisal takes precedence.
Usage
-----
Once you've configured the appraisals you want to use, you need to install the
dependencies for each appraisal:
$ bundle exec appraisal install
This will resolve, install, and lock the dependencies for that appraisal using
bundler. Once you have your dependencies set up, you can run any command in a
single appraisal:
$ bundle exec appraisal rails-3 rake test
This will run `rake test` using the dependencies configured for Rails 3. You can
also run each appraisal in turn:
$ bundle exec appraisal rake test
If you want to use only the dependencies from your Gemfile, just run `rake
test` as normal. This allows you to keep running with the latest versions of
your dependencies in quick test runs, but keep running the tests in older
versions to check for regressions.
In the case that you want to run all the appraisals by default when you run
`rake`, you can override your default Rake task by put this into your Rakefile:
if !ENV["APPRAISAL_INITIALIZED"] && !ENV["TRAVIS"]
task :default => :appraisal
end
(Appraisal sets `APPRAISAL_INITIALIZED` environment variable when it runs your
process. We put a check here to ensure that `appraisal rake` command should run
your real default task, which usually is your `test` task.)
Note that this may conflict with your CI setup if you decide to split the test
into multiple processes by Appraisal and you are using `rake` to run tests by
default.
### Commands
```bash
appraisal clean # Remove all generated gemfiles and lockfiles from gemfiles folder
appraisal generate # Generate a gemfile for each appraisal
appraisal help [COMMAND] # Describe available commands or one specific command
appraisal install # Resolve and install dependencies for each appraisal
appraisal list # List the names of the defined appraisals
appraisal update [LIST_OF_GEMS] # Remove all generated gemfiles and lockfiles, resolve, and install dependencies again
appraisal version # Display the version and exit
```
Under the hood
--------------
Running `appraisal install` generates a Gemfile for each appraisal by combining
your root Gemfile with the specific requirements for each appraisal. These are
stored in the `gemfiles` directory, and should be added to version control to
ensure that the same versions are always used.
When you prefix a command with `appraisal`, the command is run with the
appropriate Gemfile for thatExcerpt of 8,460 characters
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Would you bet a product on this? Bounded 0–100 and slow moving.
matched fp:9c830ae550dfab71, topic:testing