[TD-176]<test> add test case

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertNegativeDoubleTest.java

+package com.taosdata.jdbc.cases;
+
+import com.taosdata.jdbc.TSDBDriver;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Properties;
+
+import static org.junit.Assert.assertEquals;
+
+public class InsertNegativeDoubleTest {
+
+    static Connection connection;
+    static Statement statement;
+    static String dbName = "test";
+    static String stbName = "meters";
+    static String host = "127.0.0.1";
+
+    @Before
+    public void createDatabase() {
+        try {
+            Properties properties = new Properties();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_USER, "root");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_PASSWORD, "taosdata");
+            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);
+
+            statement = connection.createStatement();
+            statement.executeUpdate("drop database if exists " + dbName);
+            statement.executeUpdate("create database if not exists " + dbName);
+            statement.executeUpdate("use " + dbName);
+
+            String createTableSql = "create table " + stbName + "(ts timestamp, double_col double)";
+            statement.executeUpdate(createTableSql);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void testQueryBinaryData() throws SQLException {
+        String insertSql = "insert into " + stbName + " values(now, -123456789.123456789)";
+        statement.executeUpdate(insertSql);
+
+        String querySql = "select * from " + stbName;
+        ResultSet rs = statement.executeQuery(querySql);
+
+        while (rs.next()) {
+            double value = rs.getDouble(2);
+            assert(java.lang.Double.compare(-123456789.123456789, value) == 0);
+        }
+        rs.close();
+    }
+
+    @After
+    public void close() {
+        try {
+            if (statement != null)
+                statement.close();
+            if (connection != null)
+                connection.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+}
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