Don't map pathname to pathname.so on JRuby

JRuby never loads extensions as .so and pathname is provided as a
pathname.rb.

Author: headius

core/kernel/require_spec.rb

@@ -38,19 +38,22 @@
     end
     features.reject! { |feature| feature.end_with?('-fake') }
 
-      code = <<~RUBY
-        loaded_feature_base = $\".map{|f| File.basename(f, '.*')}
-        required = begin
-          require(#{feature_require.inspect})
-        rescue LoadError
-          "error"
-        end
-        feature = loaded_feature_base.include?(#{feature.inspect})
-        p({required:, feature:})
-        RUBY
-      output = ruby_exe(code, options: '--disable-gems').chomp
-      output.should == "{required: false, feature: true}"
+    features.sort.should == provided.sort
+
+    requires = provided
+    ruby_version_is "4.0" do
+      if RUBY_ENGINE != "jruby"
+        requires = requires.map { |f| f == "pathname" ? "pathname.so" : f }
+      end
+    end
+
+    ruby_version_is "4.1" do
+      requires = requires.map { |f| f == "monitor" ? "monitor.so" : f }
     end
+
+    code = requires.map { |f| "puts require #{f.inspect}\n" }.join
+    required = ruby_exe(code, options: '--disable-gems')
+    required.should == "false\n" * requires.size
   end
 
   it_behaves_like :kernel_require_basic, :require, CodeLoadingSpecs::Method.new