add receive screen, quantities for model, redistribution

spec/models/order_article_spec.rb

@@ -0,0 +1,106 @@
+require 'spec_helper'
+
+describe OrderArticle do
+  let(:order) { FactoryGirl.create :order, article_count: 1 }
+  let(:oa) { order.order_articles.first }
+
+  it 'is not ordered by default' do
+    expect(OrderArticle.ordered.count).to eq 0
+  end
+
+  [:units_to_order, :units_billed, :units_received].each do |units|
+
+    it "is ordered when there are #{units.to_s.gsub '_', ' '}" do
+      oa.update_attribute units, rand(1..99)
+      expect(OrderArticle.ordered.count).to eq 1
+    end
+
+  end
+
+  it 'knows how many items there are' do
+    oa.units_to_order = rand(1..99)
+    expect(oa.units).to eq oa.units_to_order 
+    oa.units_billed = rand(1..99)
+    expect(oa.units).to eq oa.units_billed
+    oa.units_received = rand(1..99)
+    expect(oa.units).to eq oa.units_received
+
+    oa.units_billed = rand(1..99)
+    expect(oa.units).to eq oa.units_received
+    oa.units_to_order = rand(1..99)
+    expect(oa.units).to eq oa.units_received
+    oa.units_received = rand(1..99)
+    expect(oa.units).to eq oa.units_received
+  end
+
+  describe 'redistribution' do
+    let(:admin) { FactoryGirl.create :user, groups:[FactoryGirl.create(:workgroup, role_finance: true)] }
+    let(:article) { FactoryGirl.create :article, unit_quantity: 3 }
+    let(:order) { FactoryGirl.create :order, article_ids: [article.id] }
+    let(:go1) { FactoryGirl.create :group_order, order: order }
+    let(:go2) { FactoryGirl.create :group_order, order: order }
+    let(:go3) { FactoryGirl.create :group_order, order: order }
+    let(:goa1) { FactoryGirl.create :group_order_article, group_order: go1, order_article: oa }
+    let(:goa2) { FactoryGirl.create :group_order_article, group_order: go2, order_article: oa }
+    let(:goa3) { FactoryGirl.create :group_order_article, group_order: go3, order_article: oa }
+
+    # set quantities of group_order_articles
+    def set_quantities(q1, q2, q3)
+      goa1.update_quantities(*q1)
+      goa2.update_quantities(*q2)
+      goa3.update_quantities(*q3)
+      oa.update_results!
+      order.finish!(admin)
+      goa_reload
+    end
+
+    # reload all group_order_articles
+    def goa_reload
+      [goa1, goa2, goa3].map(&:reload)
+    end
+
+    it 'has expected units_to_order' do
+      set_quantities [3,2], [1,3], [1,0]
+      expect(oa.units*oa.article.unit_quantity).to eq 6
+      expect([goa1, goa2, goa3].map(&:result)).to eq [4, 1, 1]
+    end
+
+    it 'does nothing when nothing has changed' do
+      set_quantities [3,2], [1,3], [1,0]
+      oa.redistribute 6
+      goa_reload
+      expect([goa1, goa2, goa3].map(&:result).map(&:to_i)).to eq [4, 1, 1]
+    end
+
+    it 'works when there is nothing to distribute' do
+      set_quantities [3,2], [1,3], [1,0]
+      oa.redistribute 0
+      goa_reload
+      expect([goa1, goa2, goa3].map(&:result)).to eq [0, 0, 0]
+    end
+
+    it 'works when quantity needs to be reduced' do
+      set_quantities [3,2], [1,3], [1,0]
+      oa.redistribute 4
+      goa_reload
+      expect([goa1, goa2, goa3].map(&:result)).to eq [3, 1, 0]
+    end
+
+    it 'works when quantity is increased within quantity' do
+      set_quantities [3,0], [2,0], [2,0]
+      expect([goa1, goa2, goa3].map(&:result)).to eq [3, 2, 1]
+      oa.redistribute 7
+      goa_reload
+      expect([goa1, goa2, goa3].map(&:result).map(&:to_i)).to eq [3, 2, 2]
+    end
+
+    it 'works when there is just one for the first' do
+      set_quantities [3,2], [1,3], [1,0]
+      oa.redistribute 1
+      goa_reload
+      expect([goa1, goa2, goa3].map(&:result)).to eq [1, 0, 0]
+    end
+
+  end
+
+end