Adds User#owns?

spec/models/user_spec.rb

@@ -31,6 +31,37 @@ describe User, type: :model do
     end
   end
 
+  describe '#owns?' do
+    let(:owner) { create(:user) }
+    let(:dossier) { create(:dossier, user: owner) }
+    let(:invite_user) { create(:user) }
+    let(:invite_gestionnaire) { create(:user) }
+
+    subject { user.owns?(dossier) }
+
+    context 'when user is owner' do
+      let(:user) { owner }
+
+      it { is_expected.to be_truthy }
+    end
+
+    context 'when user was invited by user' do
+      before do
+        create(:invite, dossier: dossier, user: invite_user, type: 'InviteUser')
+      end
+
+      let(:user) { invite_user }
+
+      it { is_expected.to be_falsy }
+    end
+
+    context 'when user is quidam' do
+      let(:user) { create(:user) }
+
+      it { is_expected.to be_falsey }
+    end
+  end
+
   describe '#invite?' do
     let(:dossier) { create :dossier }
     let(:user) { dossier.user }