Test theme color in web app manifest

spec/controllers/static_controller_spec.rb

@@ -59,6 +59,23 @@ describe StaticController, type: :controller do
       expect(body["name"]).to eq("Specspring")
       expect(body["start_url"]).to eq("http://test.host/?source=pwa")
       expect(body["scope"]).to eq("http://test.host/")
+      expect(body["theme_color"]).to eq("#5e35b1")
+    end
+
+    context "user with a theme is logged in" do
+      let(:user) { FactoryBot.create(:user) }
+      let!(:theme) { FactoryBot.create(:theme, user: user) }
+
+      before do
+        sign_in(user)
+      end
+
+      it "uses the user's theme" do
+        subject
+        expect(response).to have_http_status(200)
+        body = JSON.parse(response.body)
+        expect(body["theme_color"]).to eq("#8e8cd8")
+      end
     end
   end
 end