Add missing instrumentation to RedisCacheStore#read_multi

activesupport/lib/active_support/cache/redis_cache_store.rb

@@ -187,7 +187,11 @@ module ActiveSupport
       # fetched values.
       def read_multi(*names)
         if mget_capable?
-          read_multi_mget(*names)
+          instrument(:read_multi, names, options) do |payload|
+            read_multi_mget(*names).tap do |results|
+              payload[:hits] = results.keys
+            end
+          end
         else
           super
         end

activesupport/test/cache/behaviors.rb

@@ -3,6 +3,7 @@
 require_relative "behaviors/autoloading_cache_behavior"
 require_relative "behaviors/cache_delete_matched_behavior"
 require_relative "behaviors/cache_increment_decrement_behavior"
+require_relative "behaviors/cache_instrumentation_behavior"
 require_relative "behaviors/cache_store_behavior"
 require_relative "behaviors/cache_store_version_behavior"
 require_relative "behaviors/connection_pool_behavior"

activesupport/test/cache/behaviors/cache_instrumentation_behavior.rb

@@ -1,28 +1,15 @@
 # frozen_string_literal: true
 
-require "abstract_unit"
-require "active_support/cache"
-
-class CacheStoreWriteMultiEntriesStoreProviderInterfaceTest < ActiveSupport::TestCase
-  setup do
-    @cache = ActiveSupport::Cache.lookup_store(:null_store)
-  end
-
-  test "fetch_multi uses write_multi_entries store provider interface" do
+module CacheInstrumentationBehavior
+  def test_fetch_multi_uses_write_multi_entries_store_provider_interface
     assert_called_with(@cache, :write_multi_entries) do
       @cache.fetch_multi "a", "b", "c" do |key|
         key * 2
       end
     end
   end
-end
 
-class CacheStoreWriteMultiInstrumentationTest < ActiveSupport::TestCase
-  setup do
-    @cache = ActiveSupport::Cache.lookup_store(:memory_store)
-  end
-
-  test "instrumentation" do
+  def test_write_multi_instrumentation
     writes = { "a" => "aa", "b" => "bb" }
 
     events = with_instrumentation "write_multi" do
@@ -34,7 +21,7 @@ class CacheStoreWriteMultiInstrumentationTest < ActiveSupport::TestCase
     assert_equal({ "a" => "aa", "b" => "bb" }, events[0].payload[:key])
   end
 
-  test "instrumentation with fetch_multi as super operation" do
+  def test_instrumentation_with_fetch_multi_as_super_operation
     @cache.write("b", "bb")
 
     events = with_instrumentation "read_multi" do
@@ -46,6 +33,17 @@ class CacheStoreWriteMultiInstrumentationTest < ActiveSupport::TestCase
     assert_equal ["b"], events[0].payload[:hits]
   end
 
+  def test_read_multi_instrumentation
+    @cache.write("b", "bb")
+
+    events = with_instrumentation "read_multi" do
+      @cache.read_multi("a", "b") { |key| key * 2 }
+    end
+
+    assert_equal %w[ cache_read_multi.active_support ], events.map(&:name)
+    assert_equal ["b"], events[0].payload[:hits]
+  end
+
   private
     def with_instrumentation(method)
       event_name = "cache_#{method}.active_support"

activesupport/test/cache/stores/file_store_test.rb

@@ -30,6 +30,7 @@ class FileStoreTest < ActiveSupport::TestCase
   include LocalCacheBehavior
   include CacheDeleteMatchedBehavior
   include CacheIncrementDecrementBehavior
+  include CacheInstrumentationBehavior
   include AutoloadingCacheBehavior
 
   def test_clear

activesupport/test/cache/stores/mem_cache_store_test.rb

@@ -49,6 +49,7 @@ class MemCacheStoreTest < ActiveSupport::TestCase
   include CacheStoreVersionBehavior
   include LocalCacheBehavior
   include CacheIncrementDecrementBehavior
+  include CacheInstrumentationBehavior
   include EncodedKeyCacheBehavior
   include AutoloadingCacheBehavior
   include ConnectionPoolBehavior

activesupport/test/cache/stores/memory_store_test.rb

@@ -14,6 +14,7 @@ class MemoryStoreTest < ActiveSupport::TestCase
   include CacheStoreVersionBehavior
   include CacheDeleteMatchedBehavior
   include CacheIncrementDecrementBehavior
+  include CacheInstrumentationBehavior
 
   def test_prune_size
     @cache.write(1, "aaaaaaaaaa") && sleep(0.001)

activesupport/test/cache/stores/redis_cache_store_test.rb

@@ -107,6 +107,7 @@ module ActiveSupport::Cache::RedisCacheStoreTests
     include CacheStoreVersionBehavior
     include LocalCacheBehavior
     include CacheIncrementDecrementBehavior
+    include CacheInstrumentationBehavior
     include AutoloadingCacheBehavior
   end