spec(dossier_preloader): add spec

spec/models/dossier_preloader_spec.rb

@@ -0,0 +1,36 @@
+describe DossierPreloader do
+  let(:types_de_champ) do
+    [
+      { type: :text },
+      { type: :repetition, children: [{ type: :text }] }
+    ]
+  end
+  let(:procedure) { create(:procedure, types_de_champ_public: types_de_champ) }
+  let(:dossier) { create(:dossier, procedure: procedure) }
+  let(:repetition) { subject.champs.second }
+  let(:first_child) { subject.champs.second.champs.first }
+
+  describe 'all' do
+    subject { DossierPreloader.new([dossier]).all.first }
+
+    before { subject }
+
+    it do
+      count = 0
+
+      callback = lambda { |*_args| count += 1 }
+      ActiveSupport::Notifications.subscribed(callback, "sql.active_record") do
+        expect(subject.id).to eq(dossier.id)
+        expect(subject.champs.size).to eq(types_de_champ.size)
+        expect(subject.changed?).to be false
+
+        expect(first_child.type).to eq('Champs::TextChamp')
+        expect(repetition.id).not_to eq(first_child.id)
+        expect(subject.champs.first.dossier).to eq(subject)
+        expect(first_child.parent).to eq(repetition)
+      end
+
+      expect(count).to eq(1)
+    end
+  end
+end