1 files changed, 23 insertions, 6 deletions
diff --git a/spec/ruby/core/integer/plus_spec.rb b/spec/ruby/core/integer/plus_spec.rb
index d01a76ab58..b684377bd5 100644
--- a/spec/ruby/core/integer/plus_spec.rb
+++ b/spec/ruby/core/integer/plus_spec.rb
@@ -17,9 +17,9 @@ describe "Integer#+" do
       -> {
         (obj = mock('10')).should_receive(:to_int).any_number_of_times.and_return(10)
         13 + obj
-      }.should raise_error(TypeError)
-      -> { 13 + "10"    }.should raise_error(TypeError)
-      -> { 13 + :symbol }.should raise_error(TypeError)
+      }.should.raise(TypeError)
+      -> { 13 + "10"    }.should.raise(TypeError)
+      -> { 13 + :symbol }.should.raise(TypeError)
     end
   end
 
@@ -35,9 +35,9 @@ describe "Integer#+" do
     end
 
     it "raises a TypeError when given a non-Integer" do
-      -> { @bignum + mock('10') }.should raise_error(TypeError)
-      -> { @bignum + "10" }.should raise_error(TypeError)
-      -> { @bignum + :symbol}.should raise_error(TypeError)
+      -> { @bignum + mock('10') }.should.raise(TypeError)
+      -> { @bignum + "10" }.should.raise(TypeError)
+      -> { @bignum + :symbol}.should.raise(TypeError)
     end
   end
 
@@ -55,4 +55,21 @@ describe "Integer#+" do
     RUBY
     ruby_exe(code).should == "-1"
   end
+
+  it "coerces the RHS and calls #coerce" do
+    obj = mock("integer plus")
+    obj.should_receive(:coerce).with(6).and_return([6, 3])
+    (6 + obj).should == 9
+  end
+
+  it "coerces the RHS and calls #coerce even if it's private" do
+    obj = Object.new
+    class << obj
+      private def coerce(n)
+        [n, 3]
+      end
+    end
+
+    (6 + obj).should == 9
+  end
 end