refactor(pays): champ pays to use simple select

spec/models/champs/pays_champ_spec.rb

@@ -0,0 +1,71 @@
+describe Champs::PaysChamp, type: :model do
+  let(:champ) { described_class.new }
+
+  describe 'value' do
+    it 'with code' do
+      champ.value = 'GB'
+      expect(champ.external_id).to eq('GB')
+      expect(champ.value).to eq('Royaume-Uni')
+      expect(champ.selected).to eq('GB')
+      expect(champ.to_s).to eq('Royaume-Uni')
+      I18n.with_locale(:en) do
+        expect(champ.to_s).to eq('United Kingdom')
+      end
+      I18n.with_locale(:fr) do
+        expect(champ.to_s).to eq('Royaume-Uni')
+      end
+    end
+
+    it 'with name' do
+      champ.value = 'Royaume-Uni'
+      expect(champ.external_id).to eq('GB')
+      expect(champ.value).to eq('Royaume-Uni')
+      expect(champ.selected).to eq('GB')
+      expect(champ.to_s).to eq('Royaume-Uni')
+    end
+
+    it 'with nil' do
+      champ.write_attribute(:value, 'Royaume-Uni')
+      champ.write_attribute(:external_id, 'GB')
+      champ.value = nil
+      expect(champ.external_id).to be_nil
+      expect(champ.value).to be_nil
+      expect(champ.selected).to be_nil
+      expect(champ.to_s).to eq('')
+    end
+
+    it 'with blank' do
+      champ.write_attribute(:value, 'Royaume-Uni')
+      champ.write_attribute(:external_id, 'GB')
+      champ.value = ''
+      expect(champ.external_id).to be_nil
+      expect(champ.value).to be_nil
+      expect(champ.selected).to be_nil
+      expect(champ.to_s).to eq('')
+    end
+
+    it 'with initial nil' do
+      champ.write_attribute(:value, nil)
+      expect(champ.external_id).to be_nil
+      expect(champ.value).to be_nil
+      expect(champ.selected).to be_nil
+      expect(champ.to_s).to eq('')
+    end
+
+    it 'with initial name' do
+      champ.write_attribute(:value, 'Royaume-Uni')
+      expect(champ.external_id).to be_nil
+      expect(champ.value).to eq('Royaume-Uni')
+      expect(champ.selected).to eq('GB')
+      expect(champ.to_s).to eq('Royaume-Uni')
+    end
+
+    it 'with initial bad name' do
+      champ.write_attribute(:value, 'ROYAUME-UNIS')
+      expect(champ.external_id).to be_nil
+      expect(champ.value).to eq('ROYAUME-UNIS')
+      expect(champ.selected).to eq('ROYAUME-UNIS')
+      expect(champ.to_s).to eq('ROYAUME-UNIS')
+    end
+  end
+end