春季：在Maven测试中未调用@PostConstruct，但如果测试在IDEA中运行，则可以正常工作

Question

The problem is that the @PostConstruct method is not invoked during maven tests, but works fine if I run these tests in IDEA.

Why is it not invoked during maven tests and how do I fix this?

My test class:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {AppConfig.class, DBConfig.class})
@WebAppConfiguration
public class SecurityTest {

    @Autowired
    private WebApplicationContext context;

    private MockMvc mockMvc;

    @Before
    public void setup() {
        mockMvc = MockMvcBuilders
                .webAppContextSetup(context)
                .apply(springSecurity())
                .build();
    }

    @Test
    public void openLibraryPage() throws Exception {
        mockMvc.perform(get("/books")
                .with(httpBasic("admin", "admin")))
                .andDo(print())
                .andExpect(status().is2xxSuccessful());
    }

}

The class, that contains @PostConstruct (this configuration works fine and beans in this class are initialized both in maven tests and in idea tests, it's just the @PostConstruct method is not being invoked in maven tests for some reason)

@Configuration
@ComponentScan("test.task")
public class DBConfig {

    private static final Logger log = LogManager.getLogger(DBConfig.class);

    @Autowired
    private DataSource dataSource;

    @PostConstruct
    public void initializeDatabase() {
        .. some code ..
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource("jdbc:h2:mem:test-task;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE", "sa", "");
        dataSource.setDriverClassName("org.h2.Driver");
        return dataSource;
    }

    @Bean
    public JdbcTemplate jdbcTemplate() {
        return new JdbcTemplate(dataSource);
    }

}

and my pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>test.task</groupId>
    <artifactId>library</artifactId>
    <version>1.0.0</version>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.1.0</version>
                <executions>
                    <execution>
                        <id>default-war</id>
                        <phase>prepare-package</phase>
                        <configuration>
                            <failOnMissingWebXml>false</failOnMissingWebXml>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.197</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.11.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.11.1</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.liquibase</groupId>
            <artifactId>liquibase-core</artifactId>
            <version>3.6.2</version>
        </dependency>
    </dependencies>

</project>

# UPDATE 1

Added DBConfig.class to @ContextConfiguration , nothing has changed.

Answer 1

While starting the test, you are just loading the AppConfig into the context. And, it seems like DBConfig is not loaded in the context, which is the reason for initializeDatabase method not getting invoked.

To make it work, DBConfig has to be loaded,

@ContextConfiguration(classes = {AppConfig.class, DBConfig.class})

Answer 2

Had the same problem and for me it was because the following dependency was not on the classpath:

<!-- https://mvnrepository.com/artifact/javax.annotation/javax.annotation-api -->
<dependency>
    <groupId>javax.annotation</groupId>
    <artifactId>javax.annotation-api</artifactId>
    <version>1.3.2</version>
</dependency>

Are IntelliJ and Maven using the same Java Version? Maybe IntelliJ is using Java < 9, that's why it works and Maven uses Java >= 9 and therefore needs the dependency i mentioned.

See this answer