Acceptance test ActiveSupport::Cache::MemoryStore (via activesupport) as cache store backend

spec/acceptance/stores/active_support_memory_store_spec.rb

@@ -0,0 +1,38 @@
+require_relative "../../spec_helper"
+require_relative "../../support/cache_store_helper"
+
+require "timecop"
+
+describe "ActiveSupport::Cache::MemoryStore as a cache backend" do
+  before do
+    Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
+  end
+
+  after do
+    Rack::Attack.cache.store.clear
+  end
+
+  it_works_for_cache_backed_features
+
+  it "doesn't leak keys" do
+    Rack::Attack.throttle("by ip", limit: 1, period: 1) do |request|
+      request.ip
+    end
+
+    key = nil
+
+    # Freeze time during these statement to be sure that the key used by rack attack is the same
+    # we pre-calculate in local variable `key`
+    Timecop.freeze do
+      key = "rack::attack:#{Time.now.to_i}:by ip:1.2.3.4"
+
+      get "/", {}, "REMOTE_ADDR" => "1.2.3.4"
+    end
+
+    assert Rack::Attack.cache.store.fetch(key)
+
+    sleep 2.1
+
+    assert_nil Rack::Attack.cache.store.fetch(key)
+  end
+end

spec/integration/rack_attack_cache_spec.rb

@@ -17,13 +17,7 @@ describe Rack::Attack::Cache do
 
   require 'connection_pool'
 
-  cache_stores = [
-    ActiveSupport::Cache::MemoryStore.new,
-    ConnectionPool.new { Dalli::Client.new }
-  ]
-
-  cache_stores.each do |store|
-    store = Rack::Attack::StoreProxy.build(store)
+  store = Rack::Attack::StoreProxy.build(ConnectionPool.new { Dalli::Client.new })
 
   describe "with #{store.class}" do
     before do
@@ -110,4 +104,3 @@ describe Rack::Attack::Cache do
     end
   end
 end
-end