@SpringBootTest (Integration Testing)
The @SpringBootTest is a core annotation in Spring Boot for the integration testing. It can be used to the specify the configuration of ApplicationContext for the your tests.
Let’s consider a simple controller class:
@RestController
public class MyController {
@GetMapping("/hello")
public String hello() {
return "Hello, World!";
}
}
Now, let’s write a test class:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyControllerTest {
@Autowired
private MockMvc mockMvc;
@Test
public void testHelloEndpoint() throws Exception {
mockMvc.perform(get("/hello"))
.andExpect(status().isOk())
.andExpect(content().string("Hello, World!"));
}
}
Explanation:
- @RunWith(SpringRunner.class):The Specifies the runner that JUnit should use to run the tests. The SpringRunner is the new name for the SpringJUnit4ClassRunner.
- @SpringBootTest: Used to indicate that the annotated class is the Spring Boot test class.
Property File Configuration:
For testing, you might want to have a separate the application-test.properties file. The Spring Boot automatically picks up properties from this file during the tests.
Testing in Spring Boot
In this article, we will be discussing Testing in Spring Boot. There are so many different testing approaches in Spring Boot used for deploying the application server. Testing in Spring Boot is an important feature of software development which ensures that your application behaves as per the requirement and meets all the testing criteria. Spring Boot provides a robust testing framework that supports Unit Testing, Integration Testing, and End-to-End Testing.
1. Unit Tests:
- The Focus is on testing individual components or units of the code in isolation.
- Use tools like JUnit and Mockito for the writing unit tests.
2. Integration Tests:
- Test the interactions between the multiple components or modules.
- Ensures that different parts of the application work together perfectly.
- Typically involves testing repositories, services, and controllers.
3. End-to-End (E2E) Tests:
- Test the entire application from the end to end simulating real user scenarios.
- Involve testing application’s behavior through its external interfaces.
- Use tools like Selenium for the web applications.
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