change

src/connector/jdbc/src/test/java/com/taosdata/jdbc/ConnectionTest.java

 package com.taosdata.jdbc;
 
+import org.junit.Assert;
 import org.junit.Test;
 
 import java.sql.Connection;
@@ -8,53 +9,31 @@ import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.Properties;
 
-import static org.junit.Assert.assertTrue;
 
-public class ConnectionTest extends BaseTest {
-    static Connection connection = null;
-    static Statement statement = null;
-    static String dbName = "test";
-    static String stbName = "st";
-    static String host = "localhost";
+public class ConnectionTest {
+    private Connection connection;
+    private Statement statement;
+    private static String host = "127.0.0.1";
 
     @Test
-    public void testConnection() throws SQLException {
-        try {
-            Class.forName("com.taosdata.jdbc.TSDBDriver");
-        } catch (ClassNotFoundException e) {
-            return;
-        }
+    public void testConnection() {
         Properties properties = new Properties();
-        properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, host);
         properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
-        connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
-
-        assertTrue(null != connection);
-        statement = connection.createStatement();
-        assertTrue(null != statement);
-
-        // try reconnect
-        connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
 
         try {
-            statement.execute("create database if not exists " + dbName);
+            Class.forName("com.taosdata.jdbc.TSDBDriver");
+            connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
+            Assert.assertTrue(null != connection);
+            statement = connection.createStatement();
+            Assert.assertTrue(null != statement);
+            statement.close();
+            connection.close();
+        } catch (ClassNotFoundException e) {
+            return;
         } catch (SQLException e) {
-            assert false : "create database error: " + e.getMessage();
-        }
-
-        try {
-            if (!connection.isClosed()) {
-                if (!statement.isClosed()) {
-                    statement.executeUpdate("drop database " + dbName);
-                    statement.close();
-                }
-                connection.close();
-                Thread.sleep(10);
-            }
-        } catch (Exception e) {
-            assert false : "close connection error: " + e.getMessage();
+            e.printStackTrace();
         }
     }
 }