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RSpec matcher for Resque
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README.md

ResqueSpec

A simple RSpec and Cucumber matcher for Resque.enqueue and Resque.enqueue_at/enqueue_in (from ResqueScheduler), loosely based on http://github.com/justinweiss/resque_unit.

ResqueSpec will also fire Resque hooks if you are using them. See below.

This should work with Resque v1.15.0 and up and RSpec v2.5.0 and up.

If you are using RSpec ~> 1.3.0, you should use version ~> 0.2.0. This branch is not actively maintained.

Install

Update your Gemfile to include resque_spec only in the test group (Not using bundler? Do the necessary thing for your app's gem management and use bundler. resque_spec is a mock API, it should only be used with your tests!)

group :test do
  gem 'resque_spec'
end

Resque with Specs

Given this scenario

Given a person
When I recalculate
Then the person has calculate queued

And I write this spec using the resque_spec matcher

describe "#recalculate" do
  before do
    ResqueSpec.reset!
  end

  it "adds person.calculate to the Person queue" do
    person.recalculate
    Person.should have_queued(person.id, :calculate)
  end
end

(And I take note of the before block that is calling reset! for every spec)

And I might use the in statement to specify the queue:

describe "#recalculate" do
  before do
    ResqueSpec.reset!
  end

  it "adds person.calculate to the Person queue" do
    person.recalculate
    Person.should have_queued(person.id, :calculate).in(:people)
  end
end

And I might write this as a Cucumber step

Then /the (\w?) has (\w?) queued/ do |thing, method|
  thing_obj = instance_variable_get("@#{thing}")
  thing_obj.class.should have_queued(thing_obj.id, method.to_sym)
end

Then I write some code to make it pass:

class Person
  @queue = :people

  def recalculate
    Resque.enqueue(Person, id, :calculate)
  end
end

ResqueScheduler with Specs

To use with ResqueScheduler, add this require require 'resque_spec/scheduler'

Given this scenario

Given a person
When I schedule a recalculate
Then the person has calculate scheduled

And I write this spec using the resque_spec matcher

describe "#recalculate" do
  before do
    ResqueSpec.reset!
  end

  it "adds person.calculate to the Person queue" do
    person.recalculate
    Person.should have_scheduled(person.id, :calculate)
  end
end

(And I take note of the before block that is calling reset! for every spec)

(There is also a *have_scheduled_at** matcher)*

And I might write this as a Cucumber step

Then /the (\w?) has (\w?) scheduled/ do |thing, method|
  thing_obj = instance_variable_get("@#{thing}")
  thing_obj.class.should have_scheduled(thing_obj.id, method.to_sym)
end

Then I write some code to make it pass:

class Person
  @queue = :people

  def recalculate
    Resque.enqueue_at(Time.now + 3600, Person, id, :calculate)
  end
end

Queue Size Specs

You can check the size of the queue in your specs too.

describe "#recalculate" do
  before do
    ResqueSpec.reset!
  end

  it "adds an entry to the Person queue" do
    person.recalculate
    Person.should have_queue_size_of(1)
  end
end

Performing Jobs in Specs

Normally, Resque does not perform queued jobs within tests. You may want to make assertions based on the result of your jobs. ResqueSpec can process jobs immediately as they are queued or under your control.

Performing jobs immediately

To perform jobs immediately, you can pass a block to the with_resque helper:

Given this scenario

Given a game
When I score
Then the game has a score

I might write this as a Cucumber step

When /I score/ do
  with_resque do
    visit game_path
    click_link 'Score!'
  end
end

Or I write this spec using the with_resque helper

describe "#score!" do
  before do
    ResqueSpec.reset!
  end

  it "increases the score" do
    with_resque do
      game.score!
    end
    game.score.should == 10
  end
end

You can turn this behavior on by setting ResqueSpec.inline = true.

Performing jobs at your discretion

You can perform the first job on a queue at a time, or perform all the jobs on a queue. Use ResqueSpec#perform_next(queue_name) or ResqueSpec#perform_all(queue_name)

Given this scenario:

Given a game
When I score
And the score queue runs
Then the game has a score

I might write this as a Cucumber step

When /the (\w+) queue runs/ do |queue_name|
  ResqueSpec.perform_all(queue_name)
end

Hooks

Resque provides hooks at different points of the queueing lifecylce. ResqueSpec fires these hooks when appropriate.

The after enqueue hook is always called when you use Resque#enqueue.

The perform hooks: before, around, after, and on failure are fired by ResqueSpec if you are using the with_resque helper or set ResqueSpec.inline = true.

Important! Resque#enqueue_at/enqueue_in does not fire the after enqueue hook (the job has not been queued yet!), but will fire the perform hooks if you are using inline mode.

Note on Patches/Pull Requests

  • Fork the project.
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
  • Send me a pull request. Bonus points for topic branches.

Copyright

Copyright (c) 2010-2011 Les Hill. See LICENSE for details.

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