Migration to JUnit 5 in 10 minutes Test Time Measurement with Extensions
Hello!
On the last internship of Spring 5 / JPA Enterprise (Topjava), our training project migrated from JUnit 4 to JUnit 5.2. The main migration process is quite straightforward, but there are some nuances that require manual intervention. I want to briefly talk about them and create JUnit 5 Extensions to measure the time of tests in a 10-minute video.
Thanks for attention!
')
I hope that if JUnit 4 is used on your project and you have not migrated to JUnit 5 yet, this little video will inspire you. And also on the use of JUnit 5 in your new projects.
On the last internship of Spring 5 / JPA Enterprise (Topjava), our training project migrated from JUnit 4 to JUnit 5.2. The main migration process is quite straightforward, but there are some nuances that require manual intervention. I want to briefly talk about them and create JUnit 5 Extensions to measure the time of tests in a 10-minute video.
Extension code for measuring test time
import org.junit.jupiter.api.extension.*; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.util.StopWatch; public class TimingExtension implements BeforeTestExecutionCallback, AfterTestExecutionCallback, BeforeAllCallback, AfterAllCallback { private static final Logger log = LoggerFactory.getLogger("result"); private StopWatch stopWatch; @Override public void beforeAll(ExtensionContext ctx) { stopWatch = new StopWatch("Execution time of " + ctx.getRequiredTestClass().getSimpleName()); } @Override public void beforeTestExecution(ExtensionContext ctx) { log.info("Start stopWatch"); stopWatch.start(ctx.getDisplayName()); } @Override public void afterTestExecution(ExtensionContext ctx) { stopWatch.stop(); log.info("stop stopWatch"); } @Override public void afterAll(ExtensionContext ctx) { log.info('\n' + stopWatch.prettyPrint() + '\n'); } } Useful links:
- JUnit 5 homepage
- Overview
- 10 interesting innovations
- Extension model
- A Guide to JUnit 5
- Migrating from JUnit 4
- Before and After Test Execution Callbacks
- Conditional Test Execution
- Third party Extensions
- Implement assertThat
Thanks for attention!
')
I hope that if JUnit 4 is used on your project and you have not migrated to JUnit 5 yet, this little video will inspire you. And also on the use of JUnit 5 in your new projects.
Source: https://habr.com/ru/post/420891/
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