fix: JSON middleware spec failing in CI

Gemfile

@@ -2,14 +2,11 @@
 
 source 'https://rubygems.org'
 
-git_source(:github) {|repo| "https://github.com/#{repo}.git" }
-
 gemspec
 
 # Development gems
 #
 gem 'appraisal'
-gem 'json', '~> 2.1'
 gem 'rake'
 gem 'rspec', '~> 3.6'
 gem 'rspec-collection_matchers'
@@ -20,17 +17,12 @@ gem 'rake-release', '~> 1.0'
 
 # Doc
 group :development do
-  gem 'redcarpet', platform: :ruby
-  gem 'yard', '~> 0.9.24'
-
   gem 'rubocop-config', github: 'jgraichen/rubocop-config', tag: 'v14'
 end
 
 group :test do
   gem 'msgpack', '~> 1.1'
-  gem 'pry'
-  gem 'pry-byebug'
 
-  gem 'simplecov'
-  gem 'simplecov-cobertura'
+  gem 'simplecov', require: false
+  gem 'simplecov-cobertura', require: false
 end

acfs.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'actionpack', '>= 7.0'
   spec.add_dependency 'activemodel', '>= 7.0'
   spec.add_dependency 'activesupport', '>= 7.0'
-  spec.add_dependency 'multi_json', '~> 1.0'
+  spec.add_dependency 'multi_json', '~> 1.21'
   spec.add_dependency 'opentelemetry-api', '~> 1.0'
   spec.add_dependency 'opentelemetry-common'
   spec.add_dependency 'rack'

gemfiles/rails_7.2.gemfile

@@ -3,7 +3,6 @@
 source "https://rubygems.org"
 
 gem "appraisal"
-gem "json", "~> 2.1"
 gem "rake"
 gem "rspec", "~> 3.6"
 gem "rspec-collection_matchers"
@@ -16,17 +15,13 @@ gem "actionpack", "~> 7.2.0"
 gem "railties", "~> 7.2.0", require: "rails"
 
 group :development do
-  gem "redcarpet", platform: :ruby
-  gem "yard", "~> 0.9.24"
-  gem "rubocop-config", tag: "v14", git: "https://github.com/jgraichen/rubocop-config.git"
+  gem "rubocop-config", github: "jgraichen/rubocop-config", tag: "v14"
 end
 
 group :test do
   gem "msgpack", "~> 1.1"
-  gem "pry"
-  gem "pry-byebug"
-  gem "simplecov"
-  gem "simplecov-cobertura"
+  gem "simplecov", require: false
+  gem "simplecov-cobertura", require: false
 end
 
 gemspec path: "../"

gemfiles/rails_8.0.gemfile

@@ -3,7 +3,6 @@
 source "https://rubygems.org"
 
 gem "appraisal"
-gem "json", "~> 2.1"
 gem "rake"
 gem "rspec", "~> 3.6"
 gem "rspec-collection_matchers"
@@ -16,17 +15,13 @@ gem "actionpack", "~> 8.0.0"
 gem "railties", "~> 8.0.0", require: "rails"
 
 group :development do
-  gem "redcarpet", platform: :ruby
-  gem "yard", "~> 0.9.24"
-  gem "rubocop-config", tag: "v14", git: "https://github.com/jgraichen/rubocop-config.git"
+  gem "rubocop-config", github: "jgraichen/rubocop-config", tag: "v14"
 end
 
 group :test do
   gem "msgpack", "~> 1.1"
-  gem "pry"
-  gem "pry-byebug"
-  gem "simplecov"
-  gem "simplecov-cobertura"
+  gem "simplecov", require: false
+  gem "simplecov-cobertura", require: false
 end
 
 gemspec path: "../"

gemfiles/rails_8.1.gemfile

@@ -3,7 +3,6 @@
 source "https://rubygems.org"
 
 gem "appraisal"
-gem "json", "~> 2.1"
 gem "rake"
 gem "rspec", "~> 3.6"
 gem "rspec-collection_matchers"
@@ -16,17 +15,13 @@ gem "actionpack", "~> 8.1.0"
 gem "railties", "~> 8.1.0", require: "rails"
 
 group :development do
-  gem "redcarpet", platform: :ruby
-  gem "yard", "~> 0.9.24"
-  gem "rubocop-config", tag: "v14", git: "https://github.com/jgraichen/rubocop-config.git"
+  gem "rubocop-config", github: "jgraichen/rubocop-config", tag: "v14"
 end
 
 group :test do
   gem "msgpack", "~> 1.1"
-  gem "pry"
-  gem "pry-byebug"
-  gem "simplecov"
-  gem "simplecov-cobertura"
+  gem "simplecov", require: false
+  gem "simplecov-cobertura", require: false
 end
 
 gemspec path: "../"

gemfiles/rails_master.gemfile

@@ -3,30 +3,25 @@
 source "https://rubygems.org"
 
 gem "appraisal"
-gem "json", "~> 2.1"
 gem "rake"
 gem "rspec", "~> 3.6"
 gem "rspec-collection_matchers"
 gem "rspec-its"
 gem "webmock", "~> 3.0"
 gem "rake-release", "~> 1.0"
-gem "activesupport", git: "https://github.com/rails/rails.git"
-gem "activemodel", git: "https://github.com/rails/rails.git"
-gem "actionpack", git: "https://github.com/rails/rails.git"
-gem "railties", require: "rails", git: "https://github.com/rails/rails.git"
+gem "activesupport", github: "rails/rails"
+gem "activemodel", github: "rails/rails"
+gem "actionpack", github: "rails/rails"
+gem "railties", github: "rails/rails", require: "rails"
 
 group :development do
-  gem "redcarpet", platform: :ruby
-  gem "yard", "~> 0.9.24"
-  gem "rubocop-config", tag: "v14", git: "https://github.com/jgraichen/rubocop-config.git"
+  gem "rubocop-config", github: "jgraichen/rubocop-config", tag: "v14"
 end
 
 group :test do
   gem "msgpack", "~> 1.1"
-  gem "pry"
-  gem "pry-byebug"
-  gem "simplecov"
-  gem "simplecov-cobertura"
+  gem "simplecov", require: false
+  gem "simplecov-cobertura", require: false
 end
 
 gemspec path: "../"

lib/acfs.rb

@@ -1,10 +1,7 @@
 # frozen_string_literal: true
 
 require 'active_support'
-require 'active_support/core_ext/hash'
-require 'active_support/core_ext/class'
-require 'active_support/core_ext/string'
-require 'active_support/core_ext/module'
+require 'active_support/core_ext'
 require 'active_support/notifications'
 
 require 'opentelemetry'

lib/acfs/middleware/json.rb

@@ -12,12 +12,12 @@ def mime
       end
 
       def encode(data)
-        ::MultiJson.dump(data)
+        ::MultiJSON.generate(data)
       end
 
       def decode(body)
-        ::MultiJson.load(body)
-      rescue ::MultiJson::ParseError => e
+        ::MultiJSON.parse(body)
+      rescue ::MultiJSON::ParseError => e
         raise ::JSON::ParserError.new(e)
       end
     end

spec/acfs/middleware/json_spec.rb

@@ -29,12 +29,28 @@
       end
     end
 
+    context 'with #as_json objects' do
+      let(:data) do
+        Class.new do
+          def as_json(*)
+            {a: 1, b: 3}
+          end
+        end.new
+      end
+
+      it 'serializes data with #as_json' do
+        expect(JSON.parse(request.body)).to eq 'a' => 1, 'b' => 3
+      end
+    end
+
     context 'with #to_json objects' do
       let(:data) do
         Class.new do
           def to_json(*)
             '{"a": 1, "b": 2}'
           end
+
+          undef as_json
         end.new
       end