Spring 5 includes built-in abstractions for loggging and allows integration with custom logging libraries. The framework has deprecated LOG4jConfigListener and recommends using Log4j 2 for logging.

Integrating Log4j 2

Include the necessayr dependencies:

<!-- Log4j 2 SLF4J binding (transitive dependency includes core Log4j 2) -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.14.0</version>
    <scope>test</scope>
</dependency>

Place a log4j2.xml configuration file under src/main/resources:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="DEBUG">
    <Appenders>
        <Console name="StdOutLogger" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L - %msg%n" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="debug">
            <AppenderRef ref="StdOutLogger" />
        </Root>
    </Loggers>
</Configuration>

Testing Support in Spring 5

Using JUnit 4

Add the required test dependencies:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13.1</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.3.5</version>
    <scope>test</scope>
</dependency>

Example test class:

package com.example.tests;

import com.example.config.AppCfg;
import com.example.service.FinanceService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:app-context.xml")
public class FinanceServiceJUnit4Test {

    @Autowired
    private FinanceService financeSvc;

    @Test
    public void performTransfer() {
        int result = financeSvc.moveFunds(10, 20, 250);
        System.out.println(result);
    }
}

Using JUnit 5

Declare JUnit 5 dependencies:

<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <version>5.7.0</version>
    <scope>test</scope>
</dependency>

Example test class with JUnit 5:

package com.example.tests;

import com.example.service.FinanceService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;

@SpringJUnitConfig(locations = "classpath:app-context.xml")
public class FinanceServiceJUnit5Test {

    @Autowired
    private FinanceService financeSvc;

    @Test
    public void performTransfer() {
        int result = financeSvc.moveFunds(10, 20, 250);
        System.out.println(result);
    }
}