Better config reset in tests.

Author: jdantonio

lib/concurrent/utility/native_extension_loader.rb

@@ -0,0 +1,54 @@
+require 'concurrent/synchronization/abstract_object' # for JRuby
+require 'concurrent/utility/engine'
+
+module Concurrent
+  module Utility
+
+    module NativeExtensionLoader
+
+      @c_ext_loaded    ||= false
+      @java_ext_loaded ||= false
+
+      # @!visibility private
+      def allow_c_extensions?
+        Concurrent.on_cruby?
+      end
+
+      if Concurrent.on_cruby? && !@c_ext_loaded
+        tries = [
+          lambda do
+            require 'concurrent/extension'
+            @c_ext_loaded = true
+          end,
+          lambda do
+            # may be a Windows cross-compiled native gem
+            require "concurrent/#{RUBY_VERSION[0..2]}/extension"
+            @c_ext_loaded = true
+          end,
+          lambda do
+            warn 'Performance on MRI may be improved with the concurrent-ruby-ext gem. Please see http://concurrent-ruby.com'
+          end]
+
+        tries.each do |try|
+          begin
+            try.call
+            break
+          rescue LoadError
+            next
+          end
+        end
+      end
+
+      if Concurrent.on_jruby? && !@java_ext_loaded
+        begin
+          require 'concurrent_ruby_ext'
+          @java_ext_loaded = true
+        rescue LoadError
+          warn 'Performance on JRuby may be improved by installing the pre-compiled Java extensions. Please see http://concurrent-ruby.com'
+        end
+      end
+    end
+  end
+
+  extend Utility::NativeExtensionLoader
+end

spec/concurrent/configuration_spec.rb

@@ -2,9 +2,11 @@ module Concurrent
 
   describe Configuration, notravis: true do
 
-    before(:each) do
-      # redundant - done in spec_helper.rb
-      # done here again for explicitness
+    before(:all) do
+      reset_gem_configuration
+    end
+
+    after(:each) do
       reset_gem_configuration
     end