[JAVA] Annotation notes when writing tests for Spring Boot

Overview

A brief note and reference link for each annotation used in the Spring Boot test Use JUnit 5

Library used during the trial

build.gradle


testImplementation('org.springframework.boot:spring-boot-starter-test:2.1.5.RELEASE'){
		exclude module: 'junit'
	}
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.4.2'
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.2'

References

@SpringBootTest Declare when testing or mocking the component registered as a bean in the DI container

--Create a DI container (╩╗ApplicationContext) --You can't @Autowiredthe class you want to test without this --If you set thewebEnvironment` attribute, the server will be started when the test is executed. --By default, it provides a Mock Web environment without starting a server.

46.3 Testing Spring Boot Applications

@WebMvcTest Declare when testing @ Controller or @ RestController

--Create a DI container (╩╗ApplicationContext) only for the @Controllercomponent --AllowsMockMvc to be @ Autowired`

46.3.10 Auto-configured Spring MVC Tests

@RestClientTest Declare when testing a component that communicates with Http

--Allows MockRestServiceServer to be @ Autowired

46.3.20 Auto-configured REST Clients

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