better_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

describe "Test recompute delivery delay for OpenERP" do
    describe SaleOrder do
        context "when created and validated" do # virer le _and_ si possible en divisant en 2 tests
          before do
            @sale_order = SaleOrder.create_sale_order(:order_policy=>"postpaid")
            @sale_order.wkf_action('order_confirm')
          end

          it "should be in progress" do
            @sale_order.should have_for_value('state', 'progress')
          end

          # _its_, le possessif (càd "son picking" en français)
          # doc : https://www.relishapp.com/rspec/rspec-core/docs/subject/attribute-of-subject
          # via : http://pure-rspec-scotruby.heroku.com/
          # via : http://eggsonbread.com/2010/03/28/my-rspec-best-practices-and-tips/#comment-510
            its(picking_ids[0]) { should have_for_value('max_date','2012-01-12') }
# sinon j'imagine que la date correspond à la date de création, çàd Time.now, dans ce cas là
# utilise un truc comme Timecop ou delorean : https://www.ruby-toolbox.com/categories/time_warping
# plutôt qu'un truc hardcodé
          end
        end
    end
end

original_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

Original_expected_date = '2012-01-12'

describe "Test recompute delivery delay for OpenERP" do
    describe SaleOrder do
        context "when I create and validate a sale order" do
          before (:all) do
            @sale_order = SaleOrder.create_sale_order(:order_policy=>"postpaid")
            @sale_order.wkf_action('order_confirm')
          end

          subject { @sale_order }

          it { should have_for_value('state', 'progress') }
          context "then I open the picking created" do
            subject { @sale_order.picking_ids[0] }
            it { should have_for_value('max_date',Original_expected_date) }
          end
        end
    end
end

patch

diff --git a/original_spec.rb b/better_spec.rb
index 5554f2e..48a1b79 100644
--- a/original_spec.rb
+++ b/better_spec.rb
@@ -1,21 +1,25 @@
 require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')
 
-Original_expected_date = '2012-01-12'
-
 describe "Test recompute delivery delay for OpenERP" do
     describe SaleOrder do
-        context "when I create and validate a sale order" do
-          before (:all) do
+        context "when created and validated" do # virer le _and_ si possible en divisant en 2 tests
+          before do
             @sale_order = SaleOrder.create_sale_order(:order_policy=>"postpaid")
             @sale_order.wkf_action('order_confirm')
           end
 
-          subject { @sale_order }
+          it "should be in progress" do
+            @sale_order.should have_for_value('state', 'progress')
+          end
 
-          it { should have_for_value('state', 'progress') }
-          context "then I open the picking created" do
-            subject { @sale_order.picking_ids[0] }
-            it { should have_for_value('max_date',Original_expected_date) }
+          # _its_, le possessif (càd "son picking" en français)
+          # doc : https://www.relishapp.com/rspec/rspec-core/docs/subject/attribute-of-subject
+          # via : http://pure-rspec-scotruby.heroku.com/
+          # via : http://eggsonbread.com/2010/03/28/my-rspec-best-practices-and-tips/#comment-510
+            its(picking_ids[0]) { should have_for_value('max_date','2012-01-12') }
+# sinon j'imagine que la date correspond à la date de création, çàd Time.now, dans ce cas là
+# utilise un truc comme Timecop ou delorean : https://www.ruby-toolbox.com/categories/time_warping
+# plutôt qu'un truc hardcodé
           end
         end
     end