rspec-rails 4.0 release blog post

source/blog/2019-05-11-rspec-rails-4-0-has-been-released.md

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+---
+title: RSpec Rails 4.0 has been released!
+author: Benoit Tigeot, Jon Rowe and Phil Pirozhkov
+---
+
+RSpec Rails 4.0 has been released! Given our commitment to
+[semantic versioning](http://semver.org/), we've been delaying the
+breaking changes until this update. One notable change is that
+we've dropped support for Rails below 4.2.
+
+As usual, if you notice any newly introduced bugs, please let us
+know, and we'll release a fix for it ASAP.
+
+RSpec continues to be a community-driven project with contributors
+from all over the world. This release includes 258 commits and 56
+merged pull requests from 27 different contributors!
+
+Thank you to everyone who helped make this release happen!
+
+## Notable Changes
+
+Support for Rails 6, support for testing ActionCable, ActiveMailbox.
+
+### Breaking changes
+
+RSpec Rails 4 supports only Rails 5 and 6. This is in line with our
+new versioning policy which keeps major versions of RSpec Rails in
+lock step with versions of Rails.
+
+This means that we no longer support versions of Ruby below 2.2
+in line with the supported Ruby versions of Rails 5.
+
+We have only restricted the version of Rails for this version
+allow a "soft support" for Rails 4.2 during this transitionary
+period but we strongly urge you to upgrade Rails to use 4.0.0.
+
+### Removed version lock with RSpec gems
+
+The `rspec-rails` gem is no longer locked with the versioning of the other RSpec gems, we will now be releasing `rspec-rails` with each new major Rails release, keeping in lock step with their supported major versions.
+
+
+### Improved JRuby support
+
+We have improved JRuby support and RSpec Rails 4 fully supports JRuby on Rails 5 and 6.
+### Support for Action Cable
+
+We now support [channel specs][1] in order to easily test your Action Cable channels.  A `channel spec` pulls in `ActionCable::Channel::TestCase`, including all of the behavior and assertions that it provides, in addition to RSpec's own behavior and expectations.
+
+### Support for Action Mailbox
+
+Rails 6 came with [Action Mailbox][2]. We can now test them using
+`:mailbox` flag.
+
+```ruby
+```
+
+TODO: We do no have feature test for this...
+
+### Improvements to generators
+
+If you use generators, there is some improvements:
+- The default hash syntax is now the Ruby 1.9 style in generated files to match Rails.
+- Request specs are generated instead of controller specs by default
+- New [generators][3] available (channel, generator, mailbox...)
+
+### Allow configuring Active Job `queue_adapter` in system specs
+
+Some people want to run Active Job with a specific queue adapter. In system
+specs you can now choose your desired queue adapter:
+
+```ruby
+before do
+  ActiveJob::Base.queue_adapter = :inline
+end
+```
+
+### Silence log output with Puma
+
+By default Puma will no longer print logs when running system specs.
+
+### Ability to manually turn off Active Record support
+
+When using Rails without ActiveRecord or using an alternative ORM
+or a database of choice, e.g. Sequel, ROM, Mongoid etc. We can
+mistakenly detect ActiveRecord as being used due to other gems
+autoloading the constants, we now support manually turning off
+Active Record support when not configured with:
+`config.use_active_record = false`
+
+## Stats:
+
+* **Total Commits**: 258
+* **Merged pull requests**: 56
+* **27 contributors**: Andrew White, Anton Rieder, Benoit Tigeot, Jon Rowe,
+David Revelo, Giovanni Kock Bonetti, Ignatius Reza, James Dabbs, Joel AZEMAR,
+John Hawthorn, Jonathan Rochkind, Kieran O'Grady, Moshe Kamensky,
+OKURA Masafumi, Olle Jonsson, Pedro Paiva, Phil Pirozhkov, Penelope Phippen,
+Seb Jacobs, Tanbir Hasan, Viacheslav Bobrov, Vladimir Dementyev, Xavier Shay,
+alpaca-tc, pavel, ta1kt0me
+
+## Docs
+
+### API Docs
+
+* [rspec-rails](/documentation/4.0/rspec-rails/)
+
+### Cucumber Features
+
+* [rspec-rails](https://relishapp.com/rspec/rspec-rails/v/4-0/)
+
+## Release Notes
+
+### 4.0.0 / 2020-03-24
+[Full Changelog](https://github.com/rspec/rspec-rails/compare/v3.9.1...v4.0.0)
+
+Enhancements:
+
+* Adds support for Rails 6. (Penelope Phippen, Benoit Tigeot, Jon Rowe, #2071)
+* Adds support for JRuby on Rails 5.2 and 6
+* Add support for parameterised mailers (Ignatius Reza, #2125)
+* Add ActionMailbox spec helpers and test type (James Dabbs, #2119)
+* Add ActionCable spec helpers and test type (Vladimir Dementyev, #2113)
+* Add support for partial args when using `have_enqueued_mail`
+  (Ignatius Reza, #2118, #2125)
+* Add support for time arguments for `have_enqueued_job` (@alpaca-tc, #2157)
+* Improve path parsing in view specs render options. (John Hawthorn, #2115)
+* Add routing spec template as an option for generating controller specs.
+  (David Revelo, #2134)
+* Add argument matcher support to `have_enqueued_*` matchers. (Phil Pirozhkov, #2206)
+* Switch generated templates to use ruby 1.9 hash keys. (Tanbir Hasan, #2224)
+* Add `have_been_performed`/`have_performed_job`/`perform_job` ActiveJob
+  matchers (Isaac Seymour, #1785)
+* Default to generating request specs rather than controller specs when
+  generating a controller (Luka Lüdicke, #2222)
+* Allow `ActiveJob` matchers `#on_queue` modifier to take symbolic queue names. (Nils Sommer, #2283)
+* The scaffold generator now generates request specs in preference to controller specs.
+  (Luka Lüdicke, #2288)
+* Add configuration option to disable ActiveRecord. (Jon Rowe, Phil Pirozhkov, Hermann Mayer, #2266)
+*  Set `ActionDispatch::SystemTesting::Server.silence_puma = true` when running system specs.
+  (ta1kt0me, Benoit Tigeot, #2289)
+
+Bug Fixes:
+
+* `EmptyTemplateHandler.call` now needs to support an additional argument in
+  Rails 6. (Pavel Rosický, #2089)
+* Suppress warning from `SQLite3Adapter.represent_boolean_as_integer` which is
+  deprecated. (Pavel Rosický, #2092)
+* `ActionView::Template#formats` has been deprecated and replaced by
+  `ActionView::Template#format`(Seb Jacobs, #2100)
+* Replace `before_teardown` as well as `after_teardown` to ensure screenshots
+  are generated correctly. (Jon Rowe, #2164)
+* `ActionView::FixtureResolver#hash` has been renamed to `ActionView::FixtureResolver#data`.
+  (Penelope Phippen, #2076)
+* Prevent `driven_by(:selenium)` being called due to hook precedence.
+  (Takumi Shotoku, #2188)
+* Prevent a `WrongScopeError` being thrown during loading fixtures on Rails
+  6.1 development version. (Edouard Chin, #2215)
+* Fix Mocha mocking support with `should`. (Phil Pirozhkov, #2256)
+* Restore previous conditional check for setting `default_url_options` in feature
+  specs, prevents a `NoMethodError` in some scenarios. (Eugene Kenny, #2277)
+* Allow changing `ActiveJob::Base.queue_adapter` inside a system spec.
+  (Jonathan Rochkind, #2242)
+* `rails generate generator` command now creates related spec file (Joel Azemar, #2217)
+* Relax upper `capybara` version constraint to allow for Capybara 3.x (Phil Pirozhkov, #2281)
+* Clear ActionMailer test mailbox after each example (Benoit Tigeot, #2293)
+
+Breaking Changes:
+
+* Drops support for Rails below 5.0
+* Drops support for Ruby below 2.2
+
+[1]: https://relishapp.com/rspec/rspec-rails/v/4-0/docs/channel-specs
+[2]: https://guides.rubyonrails.org/action_mailbox_basics.html
+[3]: https://relishapp.com/rspec/rspec-rails/v/4-0/docs/generators