完善mock和测试

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@808 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/mock/MockCallableStatement.java

@@ -70,6 +70,10 @@ public class MockCallableStatement extends MockPreparedStatement implements Call
 
     @Override
     public boolean wasNull() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+        
         return wasNull;
     }
 

src/main/java/com/alibaba/druid/mock/MockPreparedStatement.java

@@ -60,6 +60,10 @@ public class MockPreparedStatement extends MockStatement implements PreparedStat
 
     @Override
     public ResultSet executeQuery() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+        
         if (mockConnection != null && mockConnection.getDriver() != null) {
             return mockConnection.getDriver().createResultSet(this);
         }
@@ -73,6 +77,10 @@ public class MockPreparedStatement extends MockStatement implements PreparedStat
 
     @Override
     public int executeUpdate() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+        
         return 0;
     }
 
@@ -163,6 +171,10 @@ public class MockPreparedStatement extends MockStatement implements PreparedStat
 
     @Override
     public void clearParameters() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+        
         parameters.clear();
     }
 

src/main/java/com/alibaba/druid/pool/PoolableConnection.java

@@ -81,8 +81,12 @@ public class PoolableConnection implements PooledConnection, Connection {
     void closePoolableStatement(PoolablePreparedStatement stmt) throws SQLException {
         PreparedStatement rawStatement = stmt.getRawPreparedStatement();
 
-        rawStatement.clearParameters();
-
+        try {
+            rawStatement.clearParameters();
+        } catch (SQLException ex) {
+            LOG.error("clear parameter error", ex);
+        }
+        
         if (holder.isPoolPreparedStatements()) {
             this.holder.getStatementPool().put(stmt);
             stmt.clearResultSet();