policy should be required

lib/idempotent-request/middleware.rb

@@ -3,7 +3,7 @@ module IdempotentRequest
     def initialize(app, config = {})
       @app = app
       @config = config
-      @decider = config[:decider]
+      @policy = config.fetch(:policy)
     end
 
     def call(env)
@@ -20,15 +20,15 @@ module IdempotentRequest
 
     private
 
-    attr_reader :app, :env, :config, :request, :decider
+    attr_reader :app, :env, :config, :request, :policy
 
     def process?
       !request.key.to_s.empty? && should_be_idempotent?
     end
 
     def should_be_idempotent?
-      return false unless decider
-      decider.new(request).should?
+      return false unless policy
+      policy.new(request).should?
     end
 
     def set_request(env)

spec/idempotent-request/middleware_spec.rb

@@ -9,13 +9,13 @@ RSpec.describe IdempotentRequest::Middleware do
       )
   end
   let(:storage) { @memory_storage ||= IdempotentRequest::MemoryStorage.new }
-  let(:decider) do
-    class_double('IdempotentRequest::Decider', new: double(should?: true))
+  let(:policy) do
+    class_double('IdempotentRequest::policy', new: double(should?: true))
   end
 
   let(:middleware) do
     described_class.new(app,
-      decider: decider,
+      policy: policy,
       storage: storage,
       header_key: 'X-Qonto-Idempotency-Key'
     )
@@ -45,8 +45,8 @@ RSpec.describe IdempotentRequest::Middleware do
   end
 
   context 'when should not be idempotent' do
-    let(:decider) do
-      class_double('IdempotentRequest::Decider', new: double(should?: false))
+    let(:policy) do
+      class_double('IdempotentRequest::policy', new: double(should?: false))
     end
 
     it 'should not read storage' do