Subscription tests and domain (#2209)

* Save work

* Subscriptions and trials domain

* Store family ID on customer

* Remove indirection of stripe calls

* Test simplifications

* Update brakeman

* Fix stripe tests in CI

* Update billing page to show subscription details

* Remove legacy columns

* Complete billing settings page

* Fix hardcoded plan name

* Handle subscriptions for self hosting mode

* Lint fixes

test/models/provider/stripe_test.rb

@@ -0,0 +1,45 @@
+require "test_helper"
+
+class Provider::StripeTest < ActiveSupport::TestCase
+  setup do
+    @stripe = Provider::Stripe.new(
+      secret_key: ENV["STRIPE_SECRET_KEY"] || "foo",
+      webhook_secret: ENV["STRIPE_WEBHOOK_SECRET"] || "bar"
+    )
+  end
+
+  test "creates checkout session" do
+    test_email = "test@example.com"
+
+    test_success_url = "http://localhost:3000/subscription/success?session_id={CHECKOUT_SESSION_ID}"
+    test_cancel_url = "http://localhost:3000/subscription/upgrade"
+
+    VCR.use_cassette("stripe/create_checkout_session") do
+      session = @stripe.create_checkout_session(
+        plan: "monthly",
+        family_id: 1,
+        family_email: test_email,
+        success_url: test_success_url,
+        cancel_url: test_cancel_url
+      )
+
+      assert_match /https:\/\/checkout.stripe.com\/c\/pay\/cs_test_.*/, session.url
+      assert_match /cus_.*/, session.customer_id
+    end
+  end
+
+  # To re-run VCR for this test:
+  # 1. Complete a checkout session locally in the UI
+  # 2. Find the session ID, replace below
+  # 3. Re-run VCR, make sure ENV vars are in test environment
+  test "validates checkout session and returns subscription ID" do
+    test_session_id = "cs_test_b1RD8r6DAkSA8vrQ3grBC2QVgR5zUJ7QQFuVHZkcKoSYaEOQgCMPMOCOM5" # must exist in test Dashboard
+
+    VCR.use_cassette("stripe/checkout_session") do
+      result = @stripe.get_checkout_result(test_session_id)
+
+      assert result.success?
+      assert_match /sub_.*/, result.subscription_id
+    end
+  end
+end