Add spec for identity model

spec/models/decidim/identity_spec.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe Decidim::Identity do
+  let!(:identity) { create(:identity, user: user) }
+  let(:organization) { create(:organization) }
+  let(:user) { create(:user, :confirmed, organization: organization) }
+
+  describe "#user" do
+    subject { Decidim::Identity.last.user }
+
+    it "knows its user" do
+      expect(subject).to eq(user)
+    end
+  end
+end