Use should_receive expectation instead of singleton method

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 2 deletions

diff --git a/spec/rubyspec/core/string/casecmp_spec.rb b/spec/rubyspec/core/string/casecmp_spec.rb
index c5503a18bf..6bfb66e039 100644
--- a/spec/rubyspec/core/string/casecmp_spec.rb
+++ b/spec/rubyspec/core/string/casecmp_spec.rb
@@ -19,8 +19,9 @@ describe "String#casecmp independent of case" do
   end
 
   it "tries to convert other to string using to_str" do
-    other = mock('abc')
-    def other.to_str() "abc" end
+    other = mock('x')
+    other.should_receive(:to_str).and_return("abc")
+
     "abc".casecmp(other).should == 0
   end