Spec for the new behavior of Kernel#loop

Author: eregon

core/kernel/loop_spec.rb

@@ -60,6 +60,17 @@
     lambda{ loop do raise StandardError end }.should raise_error( StandardError )
   end
 
+  ruby_version_is "2.3" do
+    it "returns StopIteration#result, the result value of a finished iterator" do
+      e = Enumerator.new { |y|
+        y << 1
+        y << 2
+        :stopped
+      }
+      loop { e.next }.should == :stopped
+    end
+  end
+
   describe "when no block is given" do
     describe "returned Enumerator" do
       describe "size" do