Restore Stripe spec stubs as todo list

spec/system/consumer/shopping/checkout_stripe_spec.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'system_helper'
+
+RSpec.describe "Check out with Stripe" do
+  describe "using Stripe SCA" do
+    context "with guest checkout" do
+      context "when the card is accepted" do
+        it "completes checkout successfully"
+      end
+
+      context "when the card is rejected" do
+        it "shows an error message from the Stripe response"
+      end
+
+      context "when the card needs extra SCA authorization" do
+        describe "and the authorization succeeds" do
+          it "completes checkout successfully"
+        end
+
+        describe "and the authorization fails" do
+          it "shows an error message from the Stripe response"
+        end
+      end
+
+      context "with multiple payment attempts; one failed and one succeeded" do
+        it "records failed payment attempt and allows order completion"
+      end
+    end
+
+    context "with a logged in user" do
+      context "saving a card and re-using it" do
+        it "allows saving a card and re-using it"
+      end
+    end
+  end
+end