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RSpec ships with a specialized subclass of Autotest. To use it, just add a .rspec file to your project's root directory, and run the autotest command as normal:

$ autotest

Bundler

The autotest command generates a shell command that runs your specs. If you are using Bundler, and you want the shell command to include bundle exec, require the Autotest bundler plugin in a .autotest file in the project's root directory or your home directory:

# in .autotest
require "autotest/bundler"

Upgrading from previous versions of rspec

Previous versions of RSpec used a different mechanism for telling autotest to invoke RSpec's Autotest extension: it generated an autotest/discover.rb file in the project's root directory. This is no longer necessary with the new approach of RSpec looking for a .rspec file, so feel free to delete the autotest/discover.rb file in the project root if you have one.

Gotchas

Invalid Option: --tty

The --tty option was added in rspec-core-2.2.1, and is used internally by RSpec. If you see an error citing it as an invalid option, you'll probably see there are two or more versions of rspec-core in the backtrace: one < 2.2.1 and one >= 2.2.1.

This usually happens because you have a newer rspec-core installed, and an older rspec-core specified in a Bundler Gemfile. If this is the case, you can:

  1. specify the newer version in the Gemfile (recommended)
  2. prefix the autotest command with bundle exec
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