refactor(conditional): extract in a ChampConditionalConcern with tests

spec/models/concern/champ_conditional_concern_spec.rb

@@ -0,0 +1,23 @@
+describe ChampConditionalConcern do
+  include Logic
+
+  let(:procedure) { create(:procedure, types_de_champ_public: [{ type: :number }, { type: :number }]) }
+  let(:dossier) { create(:dossier, revision: procedure.active_revision) }
+  let(:types_de_champ) { procedure.active_revision.types_de_champ_public }
+  let(:champ) { create(:champ, dossier:, type_de_champ: types_de_champ.first, value: 1) }
+
+  describe '#dependent_conditions?' do
+    context "when there are no condition" do
+      it { expect(champ.dependent_conditions?).to eq(false) }
+    end
+
+    context "when other tdc has a condition" do
+      before do
+        condition = ds_eq(champ_value(champ.stable_id), constant(1))
+        types_de_champ.last.update!(condition:)
+      end
+
+      it { expect(champ.dependent_conditions?).to eq(true) }
+    end
+  end
+end