Move {get,post}_via_redirect into conditional

Co-authored-by: Aubin Lorieux <[email protected]>

Author: jhawthorn

lib/rails/controller/testing/integration.rb

@@ -4,8 +4,11 @@ module Rails
   module Controller
     module Testing
       module Integration
-        http_verbs = %w(get post patch put head delete get_via_redirect post_via_redirect)
-        http_verbs.push('xhr', 'xml_http_request') if ActionPack.version < Gem::Version.new('5.1')
+        http_verbs = %w(get post patch put head delete)
+
+        if ActionPack.version < Gem::Version.new('5.1')
+          http_verbs.push('xhr', 'xml_http_request', 'get_via_redirect', 'post_via_redirect')
+        end
 
         http_verbs.each do |method|
           define_method(method) do |*args, **kwargs|