How to implement Junit testing for Insert operation using JDBC

Question

I am totally 0 in JUnit also I am completely new to Java, here is the code for Insert operation in MySQL using JDBC,

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;


public class InsertPStatementExample {
    private static final String INSERT_USERS_SQL = "INSERT INTO newUsers" +
        "  (name, email, country, password) VALUES " +
        " (?, ?, ?, ?);";

    public static void main(String[] argv) throws SQLException {
        InsertPStatementExample createTableExample = new InsertPStatementExample();
        createTableExample.insertRecord();
    }

    public void insertRecord() throws SQLException {
        System.out.println(INSERT_USERS_SQL);
        // Step 1: Establishing a Connection
        try (Connection connection = DriverManager
            .getConnection("jdbc:mysql://localhost:3306/mysql_database", "root", "root");

            // Step 2:Create a statement using connection object
            PreparedStatement preparedStatement = connection.prepareStatement(INSERT_USERS_SQL,Statement.RETURN_GENERATED_KEYS)) {
            
//          preparedStatement.setInt(1,autoGeneratedID);
            preparedStatement.setString(1, "steve");
            preparedStatement.setString(2, "[email protected]");
            preparedStatement.setString(3, "AUS");
            preparedStatement.setString(4, "simple");

            System.out.println(preparedStatement);
            // Step 3: Execute the query or update query
            preparedStatement.executeUpdate();
            ResultSet tableKeys = preparedStatement.getGeneratedKeys();
            tableKeys.next();
            int autoGeneratedID = tableKeys.getInt(1);
        } catch (SQLException e) {

            // print SQL exception information
            printSQLException(e);
        }

        // Step 4: try-with-resource statement will auto close the connection.
    }

    public static void printSQLException(SQLException ex) {
        for (Throwable e: ex) {
            if (e instanceof SQLException) {
                e.printStackTrace(System.err);
                System.err.println("SQLState: " + ((SQLException) e).getSQLState());
                System.err.println("Error Code: " + ((SQLException) e).getErrorCode());
                System.err.println("Message: " + e.getMessage());
                Throwable t = ex.getCause();
                while (t != null) {
                    System.out.println("Cause: " + t);
                    t = t.getCause();
                }
            }
        }
    }
}

The code is working fine, but I need to implement JUnit testing for the insert operation for my given task, which I don't know how to do.

Can anyone help me on this to implement it?