different-error-MRI-JRuby

diff --git a/data_objects/lib/data_objects/spec/command_spec.rb b/data_objects/lib/data_objects/spec/command_spec.rb
index ad290f6..33554ec 100644
--- a/data_objects/lib/data_objects/spec/command_spec.rb
+++ b/data_objects/lib/data_objects/spec/command_spec.rb
@@ -140,6 +140,12 @@ share_examples_for 'a Command' do
         @reader.set_types(String, String, BigDecimal)
         lambda { @reader.execute_reader("One parameter") }.should raise_error(ArgumentError, "Field-count mismatch. Expected 3 fields, but the query yielded 2")
       end
+      
+      it 'should raise an error with an invalid type' do
+        class SpecialClass < Struct.new(:id, :property); end
+        @reader.set_types(SpecialClass)
+        lambda { @reader.execute_reader("Bad parameter") }.should raise_error(ArgumentError, "Incorrect type given")
+      end
 
     end
 

gistfile1.rb

diff --git a/data_objects/lib/data_objects/spec/command_spec.rb b/data_objects/lib/data_objects/spec/command_spec.rb
index ad290f6..33554ec 100644
--- a/data_objects/lib/data_objects/spec/command_spec.rb
+++ b/data_objects/lib/data_objects/spec/command_spec.rb
@@ -140,6 +140,12 @@ share_examples_for 'a Command' do
         @reader.set_types(String, String, BigDecimal)
         lambda { @reader.execute_reader("One parameter") }.should raise_error(ArgumentError, "Field-count mismatch. Expected 3 fields, but the query yielded 2")
       end
+      
+      it 'should raise an error with an invalid type' do
+        class SpecialClass < Struct.new(:id, :property); end
+        @reader.set_types(SpecialClass, String)
+        lambda { @reader.execute_reader("Bad parameter") }.should raise_error(ArgumentError, "Incorrect type given")
+      end
 
     end