bug fixed

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@727 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/test/java/com/alibaba/druid/bvt/pool/TestClose_2.java

@@ -11,6 +11,9 @@ import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.stat.DruidDataSourceStatManager;
 
 public class TestClose_2 extends TestCase {
+    protected void setUp() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+    }
     protected void tearDown() throws Exception {
         Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
     }

src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java

@@ -18,6 +18,8 @@ public class TestConcurrent extends TestCase {
     private DruidDataSource dataSource;
 
     protected void setUp() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+        
         driver = new MockDriver();
         driver.setLogExecuteQueryEnable(false);