How can I use Testcontainers with Spring Boot?

How can I use Testcontainers with Spring Boot?

You can use Testcontainers to create lightweight, throwaway instances of common databases and other services for your Spring Boot tests.

Can you show me a simple example of how to set it up?

Sure! First, add the Testcontainers dependency to your pom.xml or build.gradle. Then, you can create a test class like this:

import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.testcontainers.containers.MySQLContainer;

@SpringBootTest
public class MyServiceTest {
    static MySQLContainer<?> mysqlContainer = new MySQLContainer<>("mysql:latest").withDatabaseName("testdb");

    static {
        mysqlContainer.start();
    }

    @Test
    void testMyService() {
        // Your test code here, using mysqlContainer.getJdbcUrl() for DB connection
    }
}

What if I want to use a different database like PostgreSQL?

You can easily switch to PostgreSQL by changing the container class to PostgreSQLContainer and updating the image name. Here's an example:

import org.testcontainers.containers.PostgreSQLContainer;

static PostgreSQLContainer<?> postgresContainer = new PostgreSQLContainer<>("postgres:latest").withDatabaseName("testdb");