Pass along arguments to underlying `get` method in `follow_redirect!` (#33299)

* Allow get arguments for follow_redirect

Now all arguments passed to `follow_redirect!` are passed to the
underlying `get` method. This for example allows to set custom headers
for the redirection request to the server.

This is especially useful for setting headers that may, outside of the
testing environment, be set automatically on every request, i.e. by a
web application firewall.

* Allow get arguments for follow_redirect

[Remo Fritzsche + Rafael Mendonça França]

actionpack/CHANGELOG.md

@@ -1,3 +1,13 @@
+*   Pass along arguments to underlying `get` method in `follow_redirect!`
+
+    Now all arguments passed to `follow_redirect!` are passed to the underlying
+    `get` method. This for example allows to set custom headers for the
+    redirection request to the server.
+
+        follow_redirect!(params: { foo: :bar })
+
+    *Remo Fritzsche*
+
 *   Introduce a new error page to when the implicit render page is accessed in the browser.
 
     Now instead of showing an error page that with exception and backtraces we now show only

actionpack/lib/action_dispatch/testing/integration.rb

@@ -50,10 +50,11 @@ module ActionDispatch
 
       # Follow a single redirect response. If the last response was not a
       # redirect, an exception will be raised. Otherwise, the redirect is
-      # performed on the location header.
-      def follow_redirect!
+      # performed on the location header. Any arguments are passed to the
+      # underlying call to `get`.
+      def follow_redirect!(**args)
         raise "not a redirect! #{status} #{status_message}" unless redirect?
-        get(response.location)
+        get(response.location, **args)
         status
       end
     end

actionpack/test/controller/integration_test.rb

@@ -349,6 +349,16 @@ class IntegrationProcessTest < ActionDispatch::IntegrationTest
     end
   end
 
+  def test_redirect_with_arguments
+    with_test_route_set do
+      get "/redirect"
+      follow_redirect! params: { foo: :bar }
+
+      assert_response :ok
+      assert_equal "bar", request.parameters["foo"]
+    end
+  end
+
   def test_xml_http_request_get
     with_test_route_set do
       get "/get", xhr: true