fix coerced tests when files are run individually

Author: Anna

test/cases/sqlserver_helper.rb

@@ -98,10 +98,22 @@ module SqlserverCoercedTest
   def self.included(base)
     base.extend ClassMethods
   end
+  
   module ClassMethods
+
+    def self.extended(base)
+      base.class_eval do
+        Array(coerced_tests).each do |method_name|
+          undef_method(method_name) rescue nil
+          STDOUT.puts("Info: Undefined coerced test: #{self.name}##{method_name}")
+        end
+      end
+    end
+    
     def coerced_tests
       self.const_get(:COERCED_TESTS) rescue nil
     end
+    
     def method_added(method)
       if coerced_tests && coerced_tests.include?(method)
         undef_method(method) rescue nil