Tests not working for multiple datasource with spring boot liquibase

问题

I am creating unittesting for spring boot application having multiple datasources. (Configuration is heavily inspired from this answer)

@Configuration
public class DatasourceConfig {

    @Primary
    @Bean
    @ConfigurationProperties(prefix = "datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix = "datasource.primary.liquibase")
    public LiquibaseProperties primaryLiquibaseProperties() {
        return new LiquibaseProperties();
    }

    @Bean
    public SpringLiquibase primaryLiquibase() {
        return springLiquibase(primaryDataSource(), primaryLiquibaseProperties());
    }

    @Bean
    @ConfigurationProperties(prefix = "datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix = "datasource.secondary.liquibase")
    public LiquibaseProperties secondaryLiquibaseProperties() {
        return new LiquibaseProperties();
    }

    @Bean
    public SpringLiquibase secondaryLiquibase() {
        return springLiquibase(secondaryDataSource(), secondaryLiquibaseProperties());
    }

    private static SpringLiquibase springLiquibase(DataSource dataSource, LiquibaseProperties properties) {
        SpringLiquibase liquibase = new SpringLiquibase();
        liquibase.setDataSource(dataSource);
        liquibase.setChangeLog(properties.getChangeLog());
        liquibase.setContexts(properties.getContexts());
        liquibase.setDefaultSchema(properties.getDefaultSchema());
        liquibase.setDropFirst(properties.isDropFirst());
        liquibase.setShouldRun(properties.isEnabled());
        liquibase.setLabels(properties.getLabels());
        liquibase.setChangeLogParameters(properties.getParameters());
        liquibase.setRollbackFile(properties.getRollbackFile());
        return liquibase;
    }


...

}

and

datasource:
  primary:
    url: jdbc:mysql://localhost/primary
    username: username
    password: password
    liquibase:
      change-log: classpath:/db/changelog/db.primary.changelog-master.xml
  secondary:
    url: jdbc:mysql://localhost/secondary
    username: username
    password: password
    liquibase:
      change-log: classpath:/db/changelog/db.secondary.changelog-master.xml

The application is running properly.

The problem is unit testing is failing with this configuration. I have used h2 as embedded DB. Added h2 as test dependency and added h2 in datasource URL as well in application.yaml for testing.

application.yaml for testing

management:
  endpoints.web.exposure.include: "*"
  security.enabled: false
spring:
  zipkin:
    discoveryClientEnabled: false
    sender:
      type: kafka
      #type: web
  liquibase:
    enabled: false
  datasource:
    url: "jdbc:h2:mem:testdb"
    jdbc-url: "jdbc:h2:mem:testdb"
    username: sa
    password:
  secondary-datasource:
    url: "jdbc:h2:mem:testdb"
    jdbc-url: "jdbc:h2:mem:testdb"
    username: sa
    password:
datasource:
 primary-liquibase:
   liquibase:
     url: "jdbc:h2:mem:testdb"
     username: sa
     password:
 secondary-liquibase:
   liquibase:
     url: "jdbc:h2:mem:testdb"
     username: sa
     password:
liquibase:
  enable: false

Unit testing file

package com.foo.bar.car;

import com.foo.bar.car.utils.KSUIDGenerator;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.boot.jdbc.EmbeddedDatabaseConnection;
import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
@AutoConfigureMockMvc
@AutoConfigureTestDatabase
// https://stackoverflow.com/a/58786742/1534925
//@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
//@AutoConfigureTestDatabase(connection = EmbeddedDatabaseConnection.H2)
class CarApplicationTests {

    @Test
    public void contextLoads() {
        String h = "Hello World!";
        Assertions.assertEquals(h, "Hello World!");
    }

    @Test
    public void testKSUIDGeneration() {
        Assertions.assertNotNull(KSUIDGenerator.generateKSUID());
    }
}

I have created a repository to demonstrate this.

When I do gradlew clean check it gives me following error

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [liquibase.integration.spring.SpringLiquibase]: Factory method 'primaryLiquibase' threw exception; nested exception is java.lang.IllegalArgumentException: No visible constructors in class org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration$EmbeddedDataSourceFactoryBean

Not sure what configuration change I am missing.

来源：https://stackoverflow.com/questions/61123061/tests-not-working-for-multiple-datasource-with-spring-boot-liquibase