added a unit test for issue http://code.google.com/p/mybatis/issues/detail?id=257

Author: nmaves

src/test/java/org/apache/ibatis/binding/BindingTest.java

@@ -9,6 +9,7 @@
 import org.junit.Test;
 
 import java.util.*;
+import org.junit.Ignore;
 
 public class BindingTest {
   private static SqlSessionFactory sqlSessionFactory;
@@ -133,6 +134,27 @@ public void shouldExecuteBoundSelectMapOfBlogsById() {
       session.close();
     }
   }
+  
+  @Test
+  @Ignore
+  public void shouldExecuteMultipleBoundSelectMapOfBlogsById() {
+    SqlSession session = sqlSessionFactory.openSession();
+    try {
+      BoundBlogMapper mapper = session.getMapper(BoundBlogMapper.class);
+      Map<Integer,Blog> blogs = mapper.selectBlogsAsMapById();
+      Map<Integer,Blog> moreBlogs = mapper.selectBlogsAsMapById();
+      assertEquals(2, blogs.size());
+      assertEquals(2, moreBlogs.size());
+      for(Map.Entry<Integer,Blog> blogEntry : blogs.entrySet()) {
+        assertEquals(blogEntry.getKey(), (Integer) blogEntry.getValue().getId());
+      }
+      for(Map.Entry<Integer,Blog> blogEntry : moreBlogs.entrySet()) {
+        assertEquals(blogEntry.getKey(), (Integer) blogEntry.getValue().getId());
+      }
+    } finally {
+      session.close();
+    }
+  }
 
   @Test
   public void shouldSelectListOfBlogsUsingXMLConfig() {