Skip to content
Fetching contributors…
Cannot retrieve contributors at this time
236 lines (161 sloc) 6.95 KB

Upgrade to rspec-core-2.0

What's changed since RSpec-1

rspec command

The command to run specs is now rspec instead of spec.

rspec ./spec

Co-habitation of rspec-1 and rspec-2

Early beta versions of RSpec-2 included a spec command, which conflicted with the RSpec-1 spec command because RSpec-1's was installed by the rspec gem, while RSpec-2's is installed by the rspec-core gem.

If you installed one of these early versions, the safest bet is to uninstall rspec-1 and rspec-core-2, and then reinstall both. After you do this, you will be able to run rspec-2 like this:

rspec ./spec

... and rspec-1 like this:

spec _1.3.1_ ./spec

Rubygems inspects the first argument to any gem executable to see if it's formatted like a version number surrounded by underscores. If so, it uses that version (e.g. 1.3.1). If not, it uses the most recent version (e.g. 2.0.0).

rake task

The RSpec rake task has moved to:


RCov options are now set directly on the Rake task: do |t|
  t.rcov_opts =  %q[--exclude "spec"]

In RSpec-1, the rake task would read in rcov options from an rcov.opts file. This is ignored by RSpec-2.


RSpec-2 works with autotest as follows:

rspec --configure autotest

This adds ./autotest/discover.rb with:

Autotest.add_discovery { "rspec2" }

Now, on the command line just type:


Or, if you're using bundler:

bundle exec autotest

The autospec command is a thing of the past.

RSpec is the new Spec

The root namespace (top level module) is now RSpec instead of Spec, and the root directory under lib within all of the rspec gems is rspec instead of spec.


Typically in spec/spec_helper.rb, configuration is now done like this:

RSpec.configure do |c|
  # ....


Command line options can be persisted in a .rspec file in a project. You can also store a .rspec file in your home directory (~/.rspec) with global options. Precedence is:

command line


Bones produces a handy little Rakefile to provide several services including running specs. The current version (3.4.7) still assumes RSpec-1. To bring its Rakefile into conformance with RSpec-2 a few changes are necessary.

  1. The require line has changed to require 'spec/rake/spectask'

  2. The spec_opts accessor has been deprecated in favor of rspec_opts. Also, the rspec command no longer supports the --options command line option so the options must be embedded directly in the Rakefile, or stored in the .rspec files mentioned above.

  3. The spec_files accessor has been replaced by pattern.

Here is a complete example:

# rspec-1 do |t|
  t.spec_opts = ['--options', "\"spec/spec.opts\""]
  t.spec_files = FileList['spec/**/*.rb']


# rspec-2 do |t|
  t.rspec_opts = ["-c", "-f progress", "-r ./spec/spec_helper.rb"]
  t.pattern = 'spec/**/*_spec.rb'

context is no longer a top-level method

We removed context from the main object because it was creating conflicts with IRB and some users who had Context domain objects. describe is still there, so if you want to use context at the top level, just alias it:

alias :context :describe

Of course, you can still use context to declare a nested group:

describe "something" do
  context "in some context" do
    it "does something" do
      # ...

$KCODE no longer set implicitly to 'u'

In RSpec-1, the runner set $KCODE to 'u', which impacts, among other things, the behaviour of Regular Expressions when applied to non-ascii characters. This is no longer the case in RSpec-2.

What's new


The new runner for rspec-2 comes from Micronaut.


In rspec-2, every example and example group comes with metadata information like the file and line number on which it was declared, the arguments passed to describe and it, etc. This metadata can be appended to through a hash argument passed to describe or it, allowing us to pre and post-process each example in a variety of ways.


The most obvious use is for filtering the run. For example:

# in spec/spec_helper.rb
RSpec.configure do |c|
  c.filter_run :focus => true

# in any spec file
describe "something" do
  it "does something", :focus => true do
    # ....

When you run the rspec command, rspec will run only the examples that have :focus => true in the hash.

You can also add run_all_when_everything_filtered to the config:

RSpec.configure do |c|
  c.filter_run :focus => true
  c.run_all_when_everything_filtered = true

Now if there are no examples tagged with :focus => true, all examples will be run. This makes it really easy to focus on one example for a while, but then go back to running all of the examples by removing that argument from it. Works with describe too, in which case it runs all of the examples in that group.

The configuration will accept a lambda, which provides a lot of flexibility in filtering examples. Say, for example, you have a spec for functionality that behaves slightly differently in Ruby 1.8 and Ruby 1.9. We have that in rspec-core, and here's how we're getting the right stuff to run under the right version:

# in spec/spec_helper.rb
RSpec.configure do |c|
  c.exclusion_filter = { :ruby => lambda {|version|
    !(RUBY_VERSION.to_s =~ /^#{version.to_s}/)

# in any spec file
describe "something" do
  it "does something", :ruby => 1.8 do
    # ....

  it "does something", :ruby => 1.9 do
    # ....

In this case, we're using exclusion_filter instead of filter_run or filter, which indicate inclusion filters. So each of those examples is excluded if we're not running the version of Ruby they work with.

Shared example groups

Shared example groups are now run in a nested group within the including group (they used to be run in the same group). Nested groups inherit before, after, around, and let hooks, as well as any methods that are defined in the parent group.

This new approach provides better encapsulation, better output, and an opportunity to add contextual information to the shared group via a block passed to it_should_behave_like.

See features/example_groups/shared_example_group.feature for more information.

NOTICE: The including example groups no longer have access to any of the methods, hooks, or state defined inside a shared group. This will break specs that were using shared example groups to extend the behavior of including groups in any way besides their intended purpose: to add examples to a group.

Something went wrong with that request. Please try again.