springboot-verification

Spring Boot Verification Loop

Run before PRs, after major changes, and pre-deploy.

When to Activate

• Before opening a pull request for a Spring Boot service
• After major refactoring or dependency upgrades
• Pre-deployment verification for staging or production
• Running full build → lint → test → security scan pipeline
• Validating test coverage meets thresholds

Phase 1: Build

mvn -T 4 clean verify -DskipTests
# or
./gradlew clean assemble -x test

If build fails, stop and fix.

Phase 2: Static Analysis

Maven (common plugins):

mvn -T 4 spotbugs:check pmd:check checkstyle:check

Gradle (if configured):

./gradlew checkstyleMain pmdMain spotbugsMain

Phase 3: Tests + Coverage

mvn -T 4 test
mvn jacoco:report   # verify 80%+ coverage
# or
./gradlew test jacocoTestReport

Report:

• Total tests, passed/failed
• Coverage % (lines/branches)

Unit Tests

Test service logic in isolation with mocked dependencies:

@ExtendWith(MockitoExtension.class)
class UserServiceTest {

  @Mock private UserRepository userRepository;
  @InjectMocks private UserService userService;

  @Test
  void createUser_validInput_returnsUser() {
    var dto = new CreateUserDto("Alice", "[email protected]");
    var expected = new User(1L, "Alice", "[email protected]");
    when(userRepository.save(any(User.class))).thenReturn(expected);

    var result = userService.create(dto);

    assertThat(result.name()).isEqualTo("Alice");
    verify(userRepository).save(any(User.class));
  }

  @Test
  void createUser_duplicateEmail_throwsException() {
    var dto = new CreateUserDto("Alice", "[email protected]");
    when(userRepository.existsByEmail(dto.email())).thenReturn(true);

    assertThatThrownBy(() -> userService.create(dto))
        .isInstanceOf(DuplicateEmailException.class);
  }
}

Integration Tests with Testcontainers

Test against a real database instead of H2:

@SpringBootTest
@Testcontainers
class UserRepositoryIntegrationTest {

  @Container
  static PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:16-alpine")
      .withDatabaseName("testdb");

  @DynamicPropertySource
  static void configureProperties(DynamicPropertyRegistry registry) {
    registry.add("spring.datasource.url", postgres::getJdbcUrl);
    registry.add("spring.datasource.username", postgres::getUsername);
    registry.add("spring.datasource.password", postgres::getPassword);
  }

  @Autowired private UserRepository userRepository;

  @Test
  void findByEmail_existingUser_returnsUser() {
    userRepository.save(new User("Alice", "[email protected]"));

    var found = userRepository.findByEmail("[email protected]");

    assertThat(found).isPresent();
    assertThat(found.get().getName()).isEqualTo("Alice");
  }
}