Test multiple prism versions in CI

Author: schneems

.github/workflows/ci.yml

@@ -32,6 +32,12 @@ jobs:
       fail-fast: false
       matrix:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
+        prism_version:
+          - 1.2.0 # Shipped with Ruby 3.4 as default parser https://www.ruby-lang.org/en/news/2024/12/25/ruby-3-4-0-released/
+          - 1.8.0
+          - head
+    env:
+      PRISM_VERSION: ${{ matrix.prism_version }}
     steps:
       - name: Checkout code
         uses: actions/checkout@v6
@@ -40,6 +46,9 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
+      - name: Use latest prism version (head only)
+        if: matrix.prism_version == 'head'
+        run: bundle update prism
       - name: test
         run: bin/rake test
         continue-on-error: ${{ matrix.ruby == 'head' }}

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## HEAD (unreleased)
 
+- Internal: Add tests to multiple versions of prism
+
 ## 2.0.2
 
 - Fix: Separate multiple parser errors by newline. (https://github.com/ruby/syntax_suggest/pull/232)

Gemfile

@@ -12,4 +12,12 @@ gem "standard"
 gem "ruby-prof"
 
 gem "benchmark-ips"
-gem "prism"
+
+case ENV["PRISM_VERSION"]&.strip&.downcase
+when "head"
+  gem "prism", github: "ruby/prism"
+when nil, ""
+  gem "prism"
+else
+  gem "prism", ENV["PRISM_VERSION"]
+end