Add feature specs for Upgrade Offer scenarios

 - Bronze Plan with < 25 users
 - Bronze Plan with > 25 users
 - Bronze Plan with < 25 users + 'Contact Sales' experiment enabled
 - Bronze Plan with > 25 users + 'Contact Sales' experiment enabled

ee/app/helpers/billing_plans_helper.rb

@@ -110,7 +110,7 @@ module BillingPlansHelper
     css_classes = %w[btn btn-success gl-button]
 
     css_classes << 'disabled' if is_current_plan && !namespace.trial_active?
-    css_classes << 'invisible' if plan.deprecated?
+    css_classes << 'invisible' if ::Feature.enabled?(:hide_deprecated_billing_plans) && plan.deprecated?
 
     css_classes.join(' ')
   end

ee/app/views/shared/billings/_billing_plan.html.haml

@@ -7,7 +7,7 @@
   - faq_link_url   = 'https://about.gitlab.com/pricing/faq-new-product-subscription-tiers'
   - faq_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: faq_link_url }
 
-.card-wrapper{ class: ("card-wrapper-has-badge" if has_upgrade) }
+.card-wrapper{ class: ("card-wrapper-has-badge" if has_upgrade), data: { testid: "plan-card-#{plan.code}" } }
   - if has_upgrade
     .card-badge
       %span.card-badge-text

ee/spec/support/helpers/subscription_portal_helpers.rb

@@ -3,7 +3,7 @@
 module SubscriptionPortalHelpers
   include StubRequests
 
-  def stub_eoa_eligibility_request(namespace_id)
+  def stub_eoa_eligibility_request(namespace_id, eligible = false, free_upgrade_plan_id = nil, assisted_upgrade_plan_id = nil)
     stub_full_request("#{EE::SUBSCRIPTIONS_URL}/graphql", method: :post)
       .with(
         body: "{\"query\":\"{\\n  subscription(namespaceId: \\\"#{namespace_id}\\\") {\\n    eoaStarterBronzeEligible\\n    assistedUpgradePlanId\\n    freeUpgradePlanId\\n  }\\n}\\n\"}",
@@ -17,7 +17,7 @@ module SubscriptionPortalHelpers
       .to_return(
         status: 200,
         headers: { 'Content-Type' => 'application/json' },
-        body: stubbed_eoa_eligibility_response_body
+        body: stubbed_eoa_eligibility_response_body(eligible, free_upgrade_plan_id, assisted_upgrade_plan_id)
       )
   end
 
@@ -41,13 +41,13 @@ module SubscriptionPortalHelpers
 
   private
 
-  def stubbed_eoa_eligibility_response_body
+  def stubbed_eoa_eligibility_response_body(eligible, free_upgrade_plan_id, assisted_upgrade_plan_id)
     {
       "data": {
         "subscription": {
-          "eoaStarterBronzeEligible": false,
-          "assistedUpgradePlanId": nil,
-          "freeUpgradePlanId": nil
+          "eoaStarterBronzeEligible": eligible,
+          "assistedUpgradePlanId": free_upgrade_plan_id,
+          "freeUpgradePlanId": assisted_upgrade_plan_id
         }
       }
     }.to_json