1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/optional/capi/symbol_spec.rb b/spec/ruby/optional/capi/symbol_spec.rb
index b8fda34c0e..12c93c9f27 100644
--- a/spec/ruby/optional/capi/symbol_spec.rb
+++ b/spec/ruby/optional/capi/symbol_spec.rb
@@ -61,6 +61,10 @@ describe "C-API Symbol function" do
     it "converts a symbol to a C char array" do
       @s.rb_id2name(:test_symbol).should == "test_symbol"
     end
+
+    it "returns (char*) NULL for (ID) 0" do
+      @s.rb_id2name_id_zero.should == nil
+    end
   end
 
   describe "rb_id2str" do
@@ -72,6 +76,10 @@ describe "C-API Symbol function" do
       str = "test_symbol".encode(Encoding::UTF_16LE)
       @s.rb_id2str(str.to_sym).encoding.should == Encoding::UTF_16LE
     end
+
+    it "returns (VALUE) 0 = Qfalse for (ID) 0" do
+      @s.rb_id2str_id_zero.should == false
+    end
   end
 
   describe "rb_intern_str" do