找不到org.junit.contrib包

Question

我使用maven构建项目，并使用JUnit进行测试。
当我尝试使用进行测试时SystemOutRule，我找不到此类，也找不到org.junit.contrib包。

ps My JUnit是最新版本4.12。

我的Maven pom.xml

<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/maven-v4_0_0.xsd"       

<modelVersion>4.0.0</modelVersion>
<groupId>com.Quentin.test</groupId>
<artifactId>test</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>test Maven Webapp</name>
<url>http://maven.apache.org</url>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.6.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>com.jayway.jsonpath</groupId>
        <artifactId>json-path</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.1.RELEASE</version>
        <scope>runtime</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
    </dependency>
</dependencies>

<build>
    <finalName>test</finalName>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-snapshots</id>
        <url>http://repo.spring.io/snapshot</url>
        <snapshots><enabled>true</enabled></snapshots>
    </repository>
    <repository>
        <id>spring-milestones</id>
        <url>http://repo.spring.io/milestone</url>
        <snapshots><enabled>true</enabled></snapshots>
    </repository>
</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>spring-snapshots</id>
        <url>http://repo.spring.io/snapshot</url>
    </pluginRepository>
    <pluginRepository>
        <id>spring-milestones</id>
        <url>http://repo.spring.io/milestone</url>
    </pluginRepository>
</pluginRepositories>

我的考试班

import org.junit.Rule;
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;

import static org.junit.Assert.assertNotNull;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CDPlayerConfig.class)
public class CDPlayerTest {

  @Rule
  public final SystemOutRule log = new SystemOutRule.enableLog();

  @Autowired
  private MediaPlayer player;

  @Autowired
  private CompactDisc disc;

  @Test
  public void checkNotNull() {
      assertNotNull(player);
      assertNotNull(disc);
  }

  @Test
  public void play() {
      player.play();
  }
}

在CDPlayerTest.class中，我尝试使用SystemOutRule，但是我的IDE（IntelliJ IDEA）提醒我该类不存在，并且在“ Maven Artifact Search”中找不到该类。

我的项目结构

Answer 1

SystemOutRule是Stefan Birkner撰写的系统规则项目的一部分。它不是JUnit的正式组成部分，但是是开源的，免费提供的，并且似乎维护得很好。

它已发布到Maven Central，并且可以通过向pom.xml文件中添加以下依赖项来获取最新版本：

<dependency>
  <groupId>com.github.stefanbirkner</groupId>
  <artifactId>system-rules</artifactId>
  <version>1.16.0</version>
  <scope>test</scope>
</dependency>