Move SignedReqestHelpers rspec config to separate file (#25453)

spec/rails_helper.rb

@@ -54,26 +54,6 @@ Devise::Test::ControllerHelpers.module_eval do
   end
 end
 
-module SignedRequestHelpers
-  def get(path, headers: nil, sign_with: nil, **args)
-    return super path, headers: headers, **args if sign_with.nil?
-
-    headers ||= {}
-    headers['Date'] = Time.now.utc.httpdate
-    headers['Host'] = ENV.fetch('LOCAL_DOMAIN')
-    signed_headers = headers.merge('(request-target)' => "get #{path}").slice('(request-target)', 'Host', 'Date')
-
-    key_id = ActivityPub::TagManager.instance.key_uri_for(sign_with)
-    keypair = sign_with.keypair
-    signed_string = signed_headers.map { |key, value| "#{key.downcase}: #{value}" }.join("\n")
-    signature = Base64.strict_encode64(keypair.sign(OpenSSL::Digest.new('SHA256'), signed_string))
-
-    headers['Signature'] = "keyId=\"#{key_id}\",algorithm=\"rsa-sha256\",headers=\"#{signed_headers.keys.join(' ').downcase}\",signature=\"#{signature}\""
-
-    super path, headers: headers, **args
-  end
-end
-
 RSpec.configure do |config|
   # This is set before running spec:system, see lib/tasks/tests.rake
   config.filter_run_excluding type: lambda { |type|