SpringBoot disabling DataSourceAutoconfigure error while running Junit Tests

In this tutorial we are going to learn about disabling DataSourceAutoconfigure error while running Junit Tests.

Disabling auto-configuration for your database is one thing, but your application classes rely on (I guess) JPA repositories from Spring Data (they inject it using @Autowired) to work.

If you now disable auto-configuration for your database, your JPA repositories can’t be bootstrapped by Spring Data and hence your service classes fail on startup as they require an available instance: … expected at least 1 bean which qualifies.

I guess you have three choices to solve this:

• Use Testcontainers to provide a real database during your tests and enable auto-configuration of the data related parts again. This would be the best solution as you can test your application with the same database you use in production.

• Keep disabling auto-configuration, but provide a manual datasource configuration for your tests:

  @SpringBootTest
  class ApplicationIntegrationTest {
  
  @TestConfiguration
  public static class TestConfig {
  
  @Bean
  public DataSource dataSource() {
    return DataSourceBuilder
      .create()
      .password("YOUR PASSWORD")
      .url("YOUR MSSQL URL")
      .username("YOUR USERNAME")
      .build();
  }
  }
  }

  Use @MockBean for all your repositories. This would allow you to completetly work without any database, but you would have to define any interaction with your repositories for yourself using Mockito:

  @SpringBootTest
  class SpringBootStackoverflowApplicationTests {
  
  @MockBean
  private SampleRepository sampleRepository;
  
  @MockBean
  private OtherRepository otherRepository;
  
  // your tests
  }