1 files changed, 12 insertions, 0 deletions
diff --git a/spec/ruby/core/signal/signame_spec.rb b/spec/ruby/core/signal/signame_spec.rb
index b66de9fc85..adfe895d97 100644
--- a/spec/ruby/core/signal/signame_spec.rb
+++ b/spec/ruby/core/signal/signame_spec.rb
@@ -9,10 +9,22 @@ describe "Signal.signame" do
     Signal.signame(-1).should == nil
   end
 
+  it "calls #to_int on an object to convert to an Integer" do
+    obj = mock('signal')
+    obj.should_receive(:to_int).and_return(0)
+    Signal.signame(obj).should == "EXIT"
+  end
+
   it "raises a TypeError when the passed argument can't be coerced to Integer" do
     -> { Signal.signame("hello") }.should raise_error(TypeError)
   end
 
+  it "raises a TypeError when the passed argument responds to #to_int but does not return an Integer" do
+    obj = mock('signal')
+    obj.should_receive(:to_int).and_return('not an int')
+    -> { Signal.signame(obj) }.should raise_error(TypeError)
+  end
+
   platform_is_not :windows do
     it "the original should take precedence over alias when looked up by number" do
       Signal.signame(Signal.list["ABRT"]).should == "ABRT"