[rubygems/rubygems] Test JRuby 10

Necessary changes to get tests passing are:

* Rewrite one "out of memory" error spec to not define a subclass inside
  a RSpec context block. Due to some [JRuby issue], that's failing in
  JRuby 10, so I rewrote the test so that the Bundler process really
  goes OOM and that class definition is not necessary.
* JRuby 10, even if Ruby 3.4-compatible, has not yet adapted backtraces
  to include receivers, so our tests need an special case for JRuby when
  detecting a test method call inside backtraces.
* Warbler test is upgraded to use JRuby 10. Getting it to pass needs [a
  PR] to warbler, so our test is temporarily pointing to that PR.

[JRuby issue]: https://github.com/jruby/jruby/issues/8838
[a PR]: https://github.com/jruby/warbler/pull/557

https://github.com/rubygems/rubygems/commit/edec85d4c3

spec/bundler/bundler/friendly_errors_spec.rb

@@ -130,17 +130,13 @@ RSpec.describe Bundler, "friendly errors" do
       # Does nothing
     end
 
-    context "Java::JavaLang::OutOfMemoryError" do
-      module Java
-        module JavaLang
-          class OutOfMemoryError < StandardError; end
-        end
-      end
-
+    context "Java::JavaLang::OutOfMemoryError", :jruby_only do
       it "Bundler.ui receive error" do
-        error = Java::JavaLang::OutOfMemoryError.new
-        expect(Bundler.ui).to receive(:error).with(/JVM has run out of memory/)
-        Bundler::FriendlyErrors.log_error(error)
+        install_gemfile <<-G, raise_on_error: false, env: { "JRUBY_OPTS" => "-J-Xmx32M" }, artifice: nil
+          source "https://gem.repo1"
+        G
+
+        expect(err).to include("JVM has run out of memory")
       end
     end
 

spec/bundler/realworld/fixtures/warbler/Gemfile

@@ -3,5 +3,5 @@
 source "https://rubygems.org"
 
 gem "demo", path: "./demo"
-gem "jruby-jars", "~> 9.4"
-gem "warbler", "~> 2.0"
+gem "jruby-jars", "~> 10.0"
+gem "warbler", github: "https://github.com/jruby/warbler/pull/557"

spec/bundler/realworld/fixtures/warbler/Gemfile.lock

@@ -1,3 +1,15 @@
+GIT
+  remote: https://github.com/jruby/warbler.git
+  revision: 3a3a89e9a055ab1badb4e6fee860e8617b4acfe1
+  ref: refs/pull/557/head
+  specs:
+    warbler (2.0.5)
+      jruby-jars (>= 9.0.0)
+      jruby-rack (>= 1.1.1, < 1.3)
+      rake (>= 13.0.3)
+      rexml (~> 3.0)
+      rubyzip (>= 1.0.0)
+
 PATH
   remote: demo
   specs:
@@ -6,15 +18,11 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    jruby-jars (9.4.10.0)
-    jruby-rack (1.1.21)
-    rake (13.0.1)
-    rubyzip (1.3.0)
-    warbler (2.0.5)
-      jruby-jars (>= 9.0.0.0)
-      jruby-rack (>= 1.1.1, < 1.3)
-      rake (>= 10.1.0)
-      rubyzip (~> 1.0, < 1.4)
+    jruby-jars (10.0.0.1)
+    jruby-rack (1.2.2)
+    rake (13.2.1)
+    rexml (3.4.1)
+    rubyzip (2.4.1)
 
 PLATFORMS
   arm64-darwin
@@ -24,8 +32,8 @@ PLATFORMS
 
 DEPENDENCIES
   demo!
-  jruby-jars (~> 9.4)
-  warbler (~> 2.0)
+  jruby-jars (~> 10.0)
+  warbler!
 
 BUNDLED WITH
    2.7.0.dev

spec/bundler/support/builders.rb

@@ -277,7 +277,7 @@ module Spec
     end
 
     def update_repo(path, build_compact_index: true)
-      exempted_caller = Gem.ruby_version >= Gem::Version.new("3.4.0.dev") ? "#{Module.nesting.first}#build_repo" : "build_repo"
+      exempted_caller = Gem.ruby_version >= Gem::Version.new("3.4.0.dev") && RUBY_ENGINE != "jruby" ? "#{Module.nesting.first}#build_repo" : "build_repo"
       if path == gem_repo1 && caller_locations(1, 1).first.label != exempted_caller
         raise "Updating gem_repo1 is unsupported -- use gem_repo2 instead"
       end