db testcontainer

gistfile1.txt

package dev.vlad.messenger;

import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.testcontainers.containers.Db2Container;
import org.testcontainers.images.builder.Transferable;
import org.testcontainers.junit.jupiter.Testcontainers;

import java.sql.*;

@Testcontainers
public class DbTests {
    public static Db2Container db2;

    @BeforeAll
    public static void prepare() {
        db2 = new Db2Container("ibmcom/db2:latest")
                .acceptLicense().withUsername("db2inst1").withPassword("password")
                .withDatabaseName("TESTDB")
                .withInitScript("init.sql");

    }

    @Test
    public void someTestMethod() {
        db2.start();
        String url = db2.getJdbcUrl();

        try {
            // Load the driver
            Class.forName("com.ibm.db2.jcc.DB2Driver");
            System.out.println("**** Loaded the JDBC driver");

            // Create the connection using the IBM Data Server Driver for JDBC and SQLJ
            String user = "db2inst1";
            String password = "password";
            Connection con = DriverManager.getConnection(url, user, password);
            // Commit changes manually
            con.setAutoCommit(false);
            System.out.println("**** Created a JDBC connection to the data source");

            // Create the Statement
            Statement stmt;
            stmt = con.createStatement();
            System.out.println("**** Created JDBC Statement object");

            // Execute a query and generate a ResultSet instance
            ResultSet rs;
            rs = stmt.executeQuery("SELECT EMPNO FROM EMPLOYEE");
            System.out.println("**** Created JDBC ResultSet object");

            // Print all of the employee numbers to standard output device
            while (rs.next()) {
                String empNo = rs.getString(1);
                System.out.println("Employee number = " + empNo);
            }
            System.out.println("**** Fetched all rows from JDBC ResultSet");
            // Close the ResultSet
            rs.close();
            System.out.println("**** Closed JDBC ResultSet");

            // Close the Statement
            stmt.close();
            System.out.println("**** Closed JDBC Statement");

            // Connection must be on a unit-of-work boundary to allow close
            con.commit();
            System.out.println("**** Transaction committed");

            // Close the connection
            con.close();
            System.out.println("**** Disconnected from data source");

            System.out.println("**** JDBC Exit from class EzJava - no errors");

        } catch (ClassNotFoundException e) {
            System.err.println("Could not load JDBC driver");
            System.out.println("Exception: " + e);
            e.printStackTrace();
        } catch (SQLException ex) {
            System.err.println("SQLException information");
            while (ex != null) {
                System.err.println("Error msg: " + ex.getMessage());
                System.err.println("SQLSTATE: " + ex.getSQLState());
                System.err.println("Error code: " + ex.getErrorCode());
                ex.printStackTrace();
                ex = ex.getNextException(); // For drivers that support chained exceptions
            }
        }
    }
}