Use Stripe payment link id for contribution URL

Agent-Logs-Url: https://github.com/we-promise/sure/sessions/efba0c75-5f82-41a1-b618-532d38e222da

Co-authored-by: jjmata <187772+jjmata@users.noreply.github.com>

test/controllers/settings/payments_controller_test.rb

@@ -15,12 +15,15 @@ class Settings::PaymentsControllerTest < ActionDispatch::IntegrationTest
 
   test "shows payment settings when family has stripe_customer_id" do
     @family.update!(stripe_customer_id: "cus_test123")
+    stripe = mock
+    stripe.expects(:payment_link_url).returns("https://buy.stripe.com/test_payment_link")
+    Provider::Registry.stubs(:get_provider).with(:stripe).returns(stripe)
 
     get settings_payment_path
     assert_response :success
     assert_select(
       "a[href=?]",
-      Rails.application.config.x.stripe.one_time_contribution_url,
+      "https://buy.stripe.com/test_payment_link",
       text: I18n.t("views.settings.payments.show.one_time_contribution_link_text")
     )
   end

test/models/provider/stripe_test.rb

@@ -42,4 +42,22 @@ class Provider::StripeTest < ActiveSupport::TestCase
       assert_match /sub_.*/, result.subscription_id
     end
   end
+
+  test "retrieves payment link url from stripe" do
+    payment_links = mock
+    payment_links.expects(:retrieve)
+      .with("plink_test123")
+      .returns(OpenStruct.new(url: "https://buy.stripe.com/test_payment_link"))
+
+    client = mock
+    client.stubs(:v1).returns(OpenStruct.new(payment_links: payment_links))
+
+    Stripe::StripeClient.stubs(:new).returns(client)
+    stripe = Provider::Stripe.new(secret_key: "foo", webhook_secret: "bar")
+
+    assert_equal(
+      "https://buy.stripe.com/test_payment_link",
+      stripe.payment_link_url(payment_link_id: "plink_test123")
+    )
+  end
 end