Add method to detect card limit exceeded to accounts

Author: jorgemanrubia

app/models/account/billing.rb

@@ -12,4 +12,8 @@ def plan
   def subscribed?
     subscription&.stripe_customer_id.present?
   end
+
+  def card_limit_exceeded?
+    cards_count > plan.card_limit
+  end
 end

test/fixtures/account_subscriptions.yml

@@ -0,0 +1,8 @@
+signals_monthly:
+  id: <%= ActiveRecord::FixtureSet.identify("signals_monthly", :uuid) %>
+  account_id: <%= ActiveRecord::FixtureSet.identify("37s", :uuid) %>
+  plan_key: monthly_v1
+  status: active
+  stripe_customer_id: cus_test_37signals
+  created_at: <%= Time.current %>
+  updated_at: <%= Time.current %>

test/models/account/billing_test.rb

@@ -0,0 +1,17 @@
+require "test_helper"
+
+class Account::BillingTest < ActiveSupport::TestCase
+  test "detect card limit exceeded" do
+    # Paid plans are never limited
+    accounts(:"37s").update_column(:cards_count, 1_000_000)
+    assert_not accounts(:"37s").card_limit_exceeded?
+
+    # Free plan under limit
+    accounts(:initech).update_column(:cards_count, 999)
+    assert_not accounts(:initech).card_limit_exceeded?
+
+    # Free plan over limit
+    accounts(:initech).update_column(:cards_count, 1001)
+    assert accounts(:initech).card_limit_exceeded?
+  end
+end