[ruby/rubygems] Cover install-time compatibility for metadata overrides

Drive bundle install end-to-end with a gem whose required_ruby_version
or required_rubygems_version excludes the current runtime, asserting
that a per-gem override (and an :all override) makes the install
succeed instead of erroring at the install-time compatibility gate.

https://github.com/ruby/rubygems/commit/dbc9f24269

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/spec/bundler/install/gemfile/override_spec.rb b/spec/bundler/install/gemfile/override_spec.rb
index 64fd9d0442..54dd031853 100644
--- a/spec/bundler/install/gemfile/override_spec.rb
+++ b/spec/bundler/install/gemfile/override_spec.rb
@@ -317,4 +317,58 @@ RSpec.describe "override DSL" do
       expect(lockfile).to include("selectable (2.0)")
     end
   end
+
+  context "install-time compatibility" do
+    it "installs a gem whose required_ruby_version excludes the current Ruby when an override removes the constraint" do
+      build_repo2 do
+        build_gem "needs_old_ruby", "1.0" do |s|
+          s.required_ruby_version = "< #{Gem.ruby_version}"
+        end
+      end
+
+      install_gemfile <<-G
+        source "https://gem.repo2"
+        override "needs_old_ruby", required_ruby_version: nil
+        gem "needs_old_ruby"
+      G
+
+      expect(the_bundle).to include_gems "needs_old_ruby 1.0"
+    end
+
+    it "installs a gem whose required_rubygems_version excludes the current RubyGems when an override removes it" do
+      build_repo2 do
+        build_gem "needs_old_rubygems", "1.0" do |s|
+          s.required_rubygems_version = "< #{Gem.rubygems_version}"
+        end
+      end
+
+      install_gemfile <<-G
+        source "https://gem.repo2"
+        override "needs_old_rubygems", required_rubygems_version: nil
+        gem "needs_old_rubygems"
+      G
+
+      expect(the_bundle).to include_gems "needs_old_rubygems 1.0"
+    end
+
+    it "installs every gem when :all required_ruby_version override is in effect" do
+      build_repo2 do
+        build_gem "needs_old_ruby_a", "1.0" do |s|
+          s.required_ruby_version = "< #{Gem.ruby_version}"
+        end
+        build_gem "needs_old_ruby_b", "1.0" do |s|
+          s.required_ruby_version = "< #{Gem.ruby_version}"
+        end
+      end
+
+      install_gemfile <<-G
+        source "https://gem.repo2"
+        override :all, required_ruby_version: :ignore_upper
+        gem "needs_old_ruby_a"
+        gem "needs_old_ruby_b"
+      G
+
+      expect(the_bundle).to include_gems "needs_old_ruby_a 1.0", "needs_old_ruby_b 1.0"
+    end
+  end
 end