Install bundler and use it to install all the development dependencies:
gem install bundler
bundle installYou should be able to run the tests now:
bundle exec rakeVCR uses RSpec for unit tests. The specs are written in a very "focused" style, where each spec is concerned only with exercising the object under test, using mocks as necessary. You can run the specs using rake spec.
Cucumber is used for end-to-end full stack integration tests that also function as VCR's documentation.