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/subscription_test.rb

@@ -0,0 +1,33 @@
+require "test_helper"
+
+class SubscriptionTest < ActiveSupport::TestCase
+  setup do
+    @family = families(:empty)
+  end
+
+  test "can create subscription without stripe details if trial" do
+    subscription = Subscription.new(
+      family: @family,
+      status: :trialing,
+    )
+
+    assert_not subscription.valid?
+
+    subscription.trial_ends_at = 14.days.from_now
+
+    assert subscription.valid?
+  end
+
+  test "stripe details required for all statuses except trial" do
+    subscription = Subscription.new(
+      family: @family,
+      status: :active,
+    )
+
+    assert_not subscription.valid?
+
+    subscription.stripe_id = "test-stripe-id"
+
+    assert subscription.valid?
+  end
+end