Fix blocking: true and add spec.

Author: ioquatix

lib/async/container/generic.rb

@@ -273,7 +273,7 @@ def delete(key, child)
 
 			private
 
-			if Fiber.respond_to?(:blocking)
+			if Fiber.respond_to?(:blocking?)
 				def fiber(&block)
 					Fiber.new(blocking: true, &block)
 				end

spec/async/container/shared_examples.rb

@@ -48,6 +48,19 @@
 		subject.wait
 	end
 
+	it "should be blocking", if: Fiber.respond_to?(:blocking?) do
+		input, output = IO.pipe
+		
+		subject.spawn do
+			output.write(Fiber.blocking? != false)
+		end
+		
+		subject.wait
+		
+		output.close
+		expect(input.read).to be == "true"
+	end
+	
 	describe '#sleep' do
 		it "can sleep for a short time" do
 			subject.spawn do