include additional AC topics in Rails subscription

lib/new_relic/agent/instrumentation/rails_notifications/action_controller.rb

@@ -32,15 +32,19 @@
     NewRelic::Agent::Instrumentation::ActionControllerSubscriber \
       .subscribe(/^process_action.action_controller$/)
 
-    subs = %w[send_file
+    subs = %w[exist_fragment?
+      expire_fragment
+      halted_callback
+      read_fragment
+      redirect_to
       send_data
+      send_file
       send_stream
-      redirect_to
-      halted_callback
-      unpermitted_parameters]
+      write_fragment
+      unpermitted_parameters].map { |s| Regexp.escape(s) }
 
     # have to double escape period because its going from string -> regex
     NewRelic::Agent::Instrumentation::ActionControllerOtherSubscriber \
-      .subscribe(Regexp.new("^(#{subs.join('|')})\\.action_controller$"))
+      .subscribe(Regexp.new("^(?:#{subs.join('|')})\\.action_controller$"))
   end
 end

test/multiverse/suites/rails/action_controller_other_test.rb

@@ -3,10 +3,11 @@
 # frozen_string_literal: true
 
 require './app'
-
 if defined?(ActionController::Live)
 
   class DataController < ApplicationController
+    CACHE_KEY = :the_key
+
     # send_file
     def send_test_file
       send_file(Rails.root + '../../../../README.md')
@@ -35,6 +36,26 @@ def do_a_redirect
     def not_allowed
       params.permit(:only_this)
     end
+
+    # exist_fragment?
+    def exist_fragment
+      fragment_exist?(CACHE_KEY)
+    end
+
+    # expire_fragment
+    def expire_test_fragment
+      expire_fragment(CACHE_KEY)
+    end
+
+    # read_fragment
+    def read_test_fragment
+      read_fragment(CACHE_KEY)
+    end
+
+    # write_fragment
+    def write_test_fragment
+      write_fragment(CACHE_KEY, 'fragment')
+    end
   end
 
   class ActionControllerDataTest < ActionDispatch::IntegrationTest
@@ -121,6 +142,66 @@ def test_unpermitted_parameters
       assert_metrics_recorded(['Controller/data/not_allowed', segment_name])
     end
 
+    def test_exist_fragment?
+      skip if Gem::Version.new(Rails::VERSION::STRING) < Gem::Version.new('6.0.0')
+
+      get('/data/exist_fragment')
+
+      node = find_node_with_name_matching(last_transaction_trace, /ActionController/)
+
+      assert node, 'Could not find an >>ActionController<< metric while testing >>exist_fragment?<<'
+      child = node.children.detect { |n| n.metric_name.include?('FileStore/exist') }
+
+      assert child, 'Could not find a >>Filestore/exist<< child of the ActionController node!'
+      assert_includes child.params[:key], DataController::CACHE_KEY,
+        "Expected to find the cache key >>#{DataController::CACHE_KEY}<< in the node params!"
+    end
+
+    def test_expire_fragment
+      skip if Gem::Version.new(Rails::VERSION::STRING) < Gem::Version.new('6.0.0')
+
+      get('/data/expire_test_fragment')
+
+      node = find_node_with_name_matching(last_transaction_trace, /ActionController/)
+
+      assert node, 'Could not find an >>ActionController<< metric while testing >>expire_fragment<<'
+      child = node.children.detect { |n| n.metric_name.include?('FileStore/delete') }
+
+      assert child, 'Could not find a >>Filestore/delete<< child of the ActionController node!'
+      assert_includes child.params[:key], DataController::CACHE_KEY,
+        "Expected to find the cache key >>#{DataController::CACHE_KEY}<< in the node params!"
+    end
+
+    def test_read_fragment
+      skip if Gem::Version.new(Rails::VERSION::STRING) < Gem::Version.new('6.0.0')
+
+      get('/data/read_test_fragment')
+
+      node = find_node_with_name_matching(last_transaction_trace, /ActionController/)
+
+      assert node, 'Could not find an >>ActionController<< metric while testing >>read_fragment<<'
+      child = node.children.detect { |n| n.metric_name.include?('FileStore/read') }
+
+      assert child, 'Could not find a >>Filestore/read<< child of the ActionController node!'
+      assert_includes child.params[:key], DataController::CACHE_KEY,
+        "Expected to find the cache key >>#{DataController::CACHE_KEY}<< in the node params!"
+    end
+
+    def test_write_fragment
+      skip if Gem::Version.new(Rails::VERSION::STRING) < Gem::Version.new('6.0.0')
+
+      get('/data/write_test_fragment')
+
+      node = find_node_with_name_matching(last_transaction_trace, /ActionController/)
+
+      assert node, 'Could not find an >>ActionController<< metric while testing >>write_fragment<<'
+      child = node.children.detect { |n| n.metric_name.include?('FileStore/write') }
+
+      assert child, 'Could not find a >>Filestore/write<< child of the ActionController node!'
+      assert_includes child.params[:key], DataController::CACHE_KEY,
+        "Expected to find the cache key >>#{DataController::CACHE_KEY}<< in the node params!"
+    end
+
     class TestClassActionController; end
 
     def test_no_metric_naming_error