StubConstant

Here's a gem I'm extracting from my friend Máximo's gem Journeyman mostly to understand better how it works and also because I'd like to use it in my gems.

When practicing TDD, you may want to test your code in extreme isolation. The idea is that any given test is only exercising the object "under test", and any other code should not be included unless it's strictly necessary to do so. The other code should also be tested, separately, in isolation.

Add this line to your application's Gemfile (probably in the test section):

gem 'stub_constant'

And then execute:

$ bundle

Or install it yourself as:

$ gem install stub_constant

Cloneable # error
StubConstant.module(:Cloneable)
Cloneable # no error
Cloneable.class #=> Module

Dog # error
StubConstant.klass(:Dog)
Dog # no error
Dog.class #=> Class

LIMIT # error
StubConstant.value(:LIMIT, 4)
LIMIT # no error
LIMIT.class #=> Fixnum

After checking out the repo, run bin/setup to install dependencies. Then, run bin/rake to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bin/rake install. To release a new version, update the version number in version.rb, and then run bin/rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/maxjacobson/stub_constant. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.