How does scoped before works in rspec?

router_spec.rb

require_relative '../router'

describe Router, "#handle" do
  before do
    puts "I'm being run before each 'it'"
    @router = Router.new
  end

  it "raises an ArgumentError on empty request string" do
    lambda{@router.handle("")}.should raise_error(ArgumentError)
  end
  
  it "runs the handler when the request is matched" do
    @router.get '/' do 2 end
    @router.handle('/').should equal 2
  end
  
  context "runs the correct handler when multiple handlers have been added" do
    before(:all) do 
      puts "I'm being run once before the 'it's in my scope"
      @router.get '/' do 1 end 
      @router.get '/foo' do 2 end 
      @router.get '/bar' do 3 end 
    end
    
    it "returns 1 for /" do 
      @router.handle('/').should equal 1
    end
    it "returns 2 for /foo" do
      @router.handle('/foo').should equal 2
    end
    it "returns 3 foo /bar" do
      @router.handle('/bar').should equal 3
    end
  end
end