Introduce `Fiber.blocking{}` for bypassing the fiber scheduler. (#6498)

1 files changed, 17 insertions, 0 deletions

diff --git a/spec/ruby/core/fiber/blocking_spec.rb b/spec/ruby/core/fiber/blocking_spec.rb
index 5ae5fbd577..852861d12f 100644
--- a/spec/ruby/core/fiber/blocking_spec.rb
+++ b/spec/ruby/core/fiber/blocking_spec.rb
@@ -60,3 +60,20 @@ ruby_version_is "3.0" do
     end
   end
 end
+
+ruby_version_is "3.2" do
+  describe "Fiber.blocking" do
+    context "when fiber is non-blocking" do
+      it "can become blocking" do
+        fiber = Fiber.new(blocking: false) do
+          Fiber.blocking do |fiber|
+            fiber.blocking? ? :blocking : :non_blocking
+          end
+        end
+
+        blocking = fiber.resume
+        blocking.should == :blocking
+      end
+    end
+  end
+end