1 files changed, 11 insertions, 2 deletions
diff --git a/spec/ruby/core/module/alias_method_spec.rb b/spec/ruby/core/module/alias_method_spec.rb
index 742e289a3f..c36dedd2d8 100644
--- a/spec/ruby/core/module/alias_method_spec.rb
+++ b/spec/ruby/core/module/alias_method_spec.rb
@@ -81,12 +81,21 @@ describe "Module#alias_method" do
     -> { @class.make_alias mock('x'), :public_one }.should raise_error(TypeError)
   end
 
+  it "raises a NoMethodError if the given name raises a NoMethodError during type coercion using to_str" do
+    obj = mock("mock-name")
+    obj.should_receive(:to_str).and_raise(NoMethodError)
+    -> { @class.make_alias obj, :public_one }.should raise_error(NoMethodError)
+  end
+
   it "is a public method" do
     Module.should have_public_instance_method(:alias_method, false)
   end
 
-  it "returns self" do
-    @class.send(:alias_method, :checking_return_value, :public_one).should equal(@class)
+  describe "returned value" do
+    it "returns symbol of the defined method name" do
+      @class.send(:alias_method, :checking_return_value, :public_one).should equal(:checking_return_value)
+      @class.send(:alias_method, 'checking_return_value', :public_one).should equal(:checking_return_value)
+    end
   end
 
   it "works in module" do