add dynamic config support

src/test/java/com/alibaba/druid/bvt/pool/basic/DataSourceTest3.java

@@ -33,7 +33,6 @@ public class DataSourceTest3 extends TestCase {
         dataSource.setDriver(driver);
         dataSource.setInitialSize(1);
         dataSource.setMaxActive(2);
-        dataSource.setMaxIdle(2);
         dataSource.setMinIdle(1);
         dataSource.setMinEvictableIdleTimeMillis(300 * 1000); // 300 / 10
         dataSource.setTimeBetweenEvictionRunsMillis(180 * 1000); // 180 / 10
@@ -41,7 +40,7 @@ public class DataSourceTest3 extends TestCase {
         dataSource.setTestOnBorrow(true);
         dataSource.setTestOnReturn(true);
         dataSource.setValidationQuery("SELECT 1");
-        dataSource.setFilters("stat,trace");
+        dataSource.setFilters("stat");
 
         JdbcStatContext context = new JdbcStatContext();
         context.setTraceEnable(true);
@@ -137,36 +136,20 @@ public class DataSourceTest3 extends TestCase {
         dataSource.setPassword("xx");
     }
 
-    public void test_error_8() throws Exception {
+    public void test_change_connectProperties() throws Exception {
         DruidPooledConnection conn = dataSource.getConnection().unwrap(DruidPooledConnection.class);
 
         conn.close();
 
-        {
-            Exception error = null;
-            try {
-                dataSource.setConnectProperties(new Properties());
-            } catch (Exception ex) {
-                error = ex;
-            }
-            Assert.assertNotNull(error);
-        }
+        dataSource.setConnectProperties(new Properties());
     }
 
-    public void test_error_9() throws Exception {
+    public void test_change_connectProperties_2() throws Exception {
         DruidPooledConnection conn = dataSource.getConnection().unwrap(DruidPooledConnection.class);
 
         conn.close();
 
-        {
-            Exception error = null;
-            try {
-                dataSource.setConnectionProperties("x=12;;");
-            } catch (Exception ex) {
-                error = ex;
-            }
-            Assert.assertNotNull(error);
-        }
+        dataSource.setConnectionProperties("x=12;;");
     }
 
     public void test_getValidConnectionCheckerClassName() throws Exception {

src/test/java/com/alibaba/druid/bvt/pool/dynamic/ConnectPropertiesChangeTest.java

@@ -0,0 +1,56 @@
+package com.alibaba.druid.bvt.pool.dynamic;
+
+import java.lang.reflect.Field;
+import java.sql.Connection;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.support.logging.Log;
+
+public class ConnectPropertiesChangeTest extends TestCase {
+
+    private DruidDataSource dataSource;
+
+    private Log             dataSourceLog;
+
+    protected void setUp() throws Exception {
+        Field logField = DruidDataSource.class.getDeclaredField("LOG");
+        logField.setAccessible(true);
+        dataSourceLog = (Log) logField.get(null);
+
+        dataSourceLog.resetStat();
+
+        dataSource = new DruidDataSource();
+        dataSource.setUrl("jdbc:mock:xxx");
+        dataSource.setTestOnBorrow(false);
+        dataSource.setConnectionProperties("a=3;b=4");
+        dataSource.init();
+        
+        Assert.assertEquals(1, dataSourceLog.getInfoCount());
+    }
+
+    protected void tearDown() throws Exception {
+        dataSource.close();
+    }
+
+    public void test_connectPropertiesChange() throws Exception {
+        Assert.assertEquals(2, dataSource.getConnectProperties().size());
+
+        Assert.assertEquals("3", dataSource.getConnectProperties().getProperty("a"));
+        Assert.assertEquals("4", dataSource.getConnectProperties().getProperty("b"));
+
+        Connection conn = dataSource.getConnection();
+        conn.close();
+
+        dataSource.setConnectionProperties("b=5;c=6");
+        
+        Assert.assertEquals(2, dataSourceLog.getInfoCount());
+
+        Assert.assertEquals(2, dataSource.getConnectProperties().size());
+
+        Assert.assertEquals("5", dataSource.getConnectProperties().getProperty("b"));
+        Assert.assertEquals("6", dataSource.getConnectProperties().getProperty("c"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/pool/dynamic/MaxActiveChangeTest.java

@@ -1,4 +1,4 @@
-package com.alibaba.druid.bvt.pool;
+package com.alibaba.druid.bvt.pool.dynamic;
 
 import java.sql.Connection;