before_blocks.rb

class BlobGatherer
  @@blobs = %w(foo bar baz qux)

  def self.gather
    @@blobs.shift
  end
end

describe 'Before' do
  context ':all' do
    before(:all) do
      @blobs = BlobGatherer.gather
    end

    specify { @blobs.should == 'foo' }
    specify { @blobs.should == 'foo' }
    specify { @blobs.should == 'foo' }
  end

  context ':each' do
    before(:each) do
      @blobs = BlobGatherer.gather
    end

    specify { @blobs.should == 'bar' }
    specify { @blobs.should == 'baz' }
    specify { @blobs.should == 'qux' }
  end
end