Test with rack 2 and 3

.github/workflows/ruby.yml

@@ -9,4 +9,5 @@ jobs:
       with:
         ruby-version: '3.1'
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
-    - run: bundle exec rake
+    - run: BUNDLE_GEMFILE=Gemfile bundle exec rake
+    - run: BUNDLE_GEMFILE=Gemfile.rack2 bundle exec rake

Gemfile

@@ -2,9 +2,10 @@
 
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in openapi_first.gemspec
 gemspec
 
+gem 'rack', '>= 3.0.0'
+
 group :test, :development do
   gem 'bundler'
   gem 'rack-test'

Gemfile.lock

@@ -88,6 +88,7 @@ PLATFORMS
 DEPENDENCIES
   bundler
   openapi_first!
+  rack (>= 3.0.0)
   rack-test
   rake
   rspec

Gemfile.rack2

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+gemspec
+
+gem 'rack', '< 3.0.0'
+
+group :test, :development do
+  gem 'bundler'
+  gem 'rack-test'
+  gem 'rake'
+  gem 'rspec'
+  gem 'rubocop'
+end

Gemfile.rack2.lock

@@ -0,0 +1,97 @@
+PATH
+  remote: .
+  specs:
+    openapi_first (1.0.0.beta6)
+      json_refs (~> 0.1, >= 0.1.7)
+      json_schemer (~> 2.0.0)
+      multi_json (~> 1.15)
+      mustermann-contrib (~> 3.0.0)
+      openapi_parameters (>= 0.3.2, < 2.0)
+      rack (>= 2.2, < 4.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.2)
+    diff-lcs (1.5.0)
+    hana (1.3.7)
+    hansi (0.2.1)
+    json (2.6.3)
+    json_refs (0.1.8)
+      hana
+    json_schemer (2.0.0)
+      hana (~> 1.3)
+      regexp_parser (~> 2.0)
+      simpleidn (~> 0.2)
+    language_server-protocol (3.17.0.3)
+    multi_json (1.15.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
+    mustermann-contrib (3.0.0)
+      hansi (~> 0.2.0)
+      mustermann (= 3.0.0)
+    openapi_parameters (0.3.2)
+      rack (>= 2.2)
+      zeitwerk (~> 2.6)
+    parallel (1.23.0)
+    parser (3.2.2.4)
+      ast (~> 2.4.1)
+      racc
+    racc (1.7.3)
+    rack (2.2.8)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.1.0)
+    regexp_parser (2.8.2)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rubocop (1.57.2)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.2.2.4)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.30.0)
+      parser (>= 3.2.1.0)
+    ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
+    simpleidn (0.2.1)
+      unf (~> 0.1.4)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.9.1)
+    unicode-display_width (2.5.0)
+    zeitwerk (2.6.12)
+
+PLATFORMS
+  arm64-darwin-21
+
+DEPENDENCIES
+  bundler
+  openapi_first!
+  rack (< 3.0.0)
+  rack-test
+  rake
+  rspec
+  rubocop
+
+BUNDLED WITH
+   2.3.10