java - 如果数据源创建失败，如何测试 Spring Boot 是否“不”启动

Question

有没有办法编写单元测试来确保如果某个 bean 创建失败，Spring Boot API 不会启动。例如:无法创建数据源 bean。

Answer 1

此代码应该可以为您完成:

@RunWith(SpringRunner.class)
@SpringBootTest
public class AnyAppNameApplicationTests {

    @Test
    public void contextLoads() {
    }

}

来自文档:

Annotation that can be specified on a test class that runs Spring Boot based tests. Provides the following features over and above the regular Spring TestContext Framework:

• Uses SpringBootContextLoader as the default ContextLoader when no specific @ContextConfiguration(loader=...) is defined.
• Automatically searches for a @SpringBootConfiguration when nested @Configuration is not used, and no explicit classes are specified.
• Allows custom Environment properties to be defined using the properties attribute.
• Provides support for different webEnvironment modes, including the ability to start a fully running web server listening on a defined or random port.
• Registers a TestRestTemplate and/or WebTestClient bean for use in web tests that are using a fully running web server.

If you are using JUnit 4, don’t forget to also add @RunWith(SpringRunner.class) to your test, otherwise the annotations will be ignored. If you are using JUnit 5, there’s no need to add the equivalent @ExtendWith(SpringExtension) as @SpringBootTest and the other @…Test annotations are already annotated with it.