如何在内存中嵌入 MariaDB4j 以替换 JUnit 测试中的默认 Spring DataSource?

How to embed in memory MariaDB4j to replace default Spring DataSource in JUnit Tests?

我正在为使用多个数据 Jpa 存储库的 Service 编写测试。问题是一些存储库使用大量具有 MySQL 特定功能的本机查询,例如 str_to_date()。因此,当我尝试使用 H2 测试服务的方法时,我收到一条错误消息,指出 H2 无法识别函数。我试过在 MySQL 模式下使用 H2,但得到了同样的错误。

here mariaDB4j 被提议作为解决方法。我在 Maven

中添加了依赖项
<dependency>
    <groupId>ch.vorburger.mariaDB4j</groupId>
    <artifactId>mariaDB4j</artifactId>
    <version>2.3.0</version>
    <scope>test</scope>
</dependency>

但是得到 IllegalStateException : Failed to replace DataSource with an embedded database for tests. If you want an embedded database please put a supported one on the classpath or tune the replace attribute of @AutoConfigureTestDatabase.

我的测试文件看起来是这样的:

@RunWith(SpringRunner.class)
@DataJpaTest
@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.ANY)
public class TestPay {

    @TestConfiguration
    static class PaymentServiceTestContextConfiguration {
        @Bean
        public PaymentService paymentService(){
            return new PaymentService();
        }
    }

    @Autowired
    private PaymentService paymentService;
    @Autowired
    private TarifRepository firstRepository;
    @Autowired
    private BuildingRepository secondRepository;
    @Autowired
    private ApartmentRepository thirdRepository;

    /* Test cases here*/
}

该项目是使用注释驱动构建的 Spring 引导。

听起来您需要明确声明 DataSource 才能进行测试。在 h2 的情况下,可能已经有一个由 spring 测试依赖项声明的数据源 bean,但可能没有由 ch.vorburger.mariaDB4j.

提供的现成的 bean

这是我从 elsewhere on the internet

窃取的嵌入式 MariaDB 数据源的示例
import ch.vorburger.mariadb4j.DBConfigurationBuilder
import ch.vorburger.mariadb4j.springframework.MariaDB4jSpringService
import org.springframework.beans.factory.annotation.Value
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.context.annotation.Profile

import javax.sql.DataSource

@Configuration
@Profile(['local', 'integrationTest'])
class EmbeddedMariaDbConfig {

    @Bean
    MariaDB4jSpringService mariaDB4jSpringService() {
        new MariaDB4jSpringService()
    }

    @Bean
    DataSource dataSource(MariaDB4jSpringService mariaDB4jSpringService,
                          @Value('${app.mariaDB4j.databaseName}') String databaseName,
                          @Value('${spring.datasource.username}') String datasourceUsername,
                          @Value('${spring.datasource.password}') String datasourcePassword,
                          @Value('${spring.datasource.driver-class-name}') String datasourceDriver) {
        //Create our database with default root user and no password
        mariaDB4jSpringService.getDB().createDB(databaseName)

        DBConfigurationBuilder config = mariaDB4jSpringService.getConfiguration()

        DataSourceBuilder
                .create()
                .username(datasourceUsername)
                .password(datasourcePassword)
                .url(config.getURL(databaseName))
                .driverClassName(datasourceDriver)
                .build();
    }
}

我构建了以下 class,我在每个需要数据库访问 mariadb 的集成测试中重复使用它们。它可能会得到改进(我很乐意提出建议),但到目前为止它有效:

@RunWith(SpringRunner.class)
@SpringBootTest
@TestPropertySource(locations="classpath:application-junit.properties")
@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS) //otherwise mariadb is not cleaned up between tests
public abstract class MyIntegrationTest {

    private static MariaDB4jSpringService DB;

    @BeforeClass
    public static void init() throws ManagedProcessException {
        DB = new MariaDB4jSpringService();
        DB.setDefaultPort(1234);
        DB.start();
        DB.getDB().createDB("yourtables");
        DB.getDB().source("schema.sql"); // init scripts from /src/test/resources/schema.sql
    }

    @AfterClass
    public static void cleanup() {
        if (DB != null) DB.stop();
    }
}

application-junit.属性:

spring.datasource.url=jdbc:mariadb://localhost:1234/yourtables
spring.datasource.username=root
spring.datasource.password=