Test against prev, current and next Sinatra release

.github/workflows/test.yml

@@ -10,16 +10,23 @@ on:
 
 jobs:
   test:
-    name: Test with Ruby-${{ matrix.ruby }}
+    name: ${{ matrix.ruby }}, sinatra ${{ matrix.sinatra }})
     runs-on: ubuntu-latest
     timeout-minutes: 15
     strategy:
       fail-fast: false
       matrix:
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
-        ruby: [2.6, 2.7, '3.0', 3.1, 3.2, 3.3, head, truffleruby]
+        ruby: [2.6, 2.7, '3.0', 3.1, 3.2, 3.3, truffleruby]
+        sinatra:
+          - ~> 4.0.0 # current stable
         include:
-          - { ruby: jruby, allow-failure: true }
+          - { ruby: 2.6, sinatra: ~> 3.0.0 }
+          - { ruby: 3.3, sinatra: head }
+          - { ruby: head, sinatra: head }
+          - { ruby: jruby, sinatra: ~> 4.0.0, allow-failure: true }
+    env:
+      rack: ${{ matrix.sinatra }}
     steps:
     - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1

Gemfile

@@ -6,3 +6,8 @@ path '.' do
   Support::Projects.each { |name| gem(name) }
   gem 'support', group: :development
 end
+
+sinatra_version = ENV['sinatra'].to_s
+sinatra_version = nil if sinatra_version.empty? || (sinatra_version == 'stable')
+sinatra_version = { github: 'sinatra/sinatra' } if sinatra_version == 'head'
+gem 'sinatra', sinatra_version

support/support.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'rspec'
   s.add_dependency 'rspec-its'
   s.add_dependency 'addressable'
-  s.add_dependency 'sinatra', '~> 1.4'
+  s.add_dependency 'sinatra'
   s.add_dependency 'rack-test'
   s.add_dependency 'rake'
   s.add_dependency 'yard'