1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/optional/capi/array_spec.rb b/spec/ruby/optional/capi/array_spec.rb
index acd225e0e0..cf65bc19b6 100644
--- a/spec/ruby/optional/capi/array_spec.rb
+++ b/spec/ruby/optional/capi/array_spec.rb
@@ -249,6 +249,14 @@ describe "C-API Array function" do
       @s.RARRAY_PTR_assign(a, :set)
       a.should == [:set, :set, :set]
     end
+
+    it "allows memcpying between arrays" do
+      a = [1, 2, 3]
+      b = [0, 0, 0]
+      @s.RARRAY_PTR_memcpy(a, b)
+      b.should == [1, 2, 3]
+      a.should == [1, 2, 3] # check a was not modified
+    end
   end
 
   describe "RARRAY_LEN" do