could not find org.junit.contrib package

Question

I use maven to build my project and JUnit to test.
When I tried to do test using SystemOutRule, I could not find this class and could not find org.junit.contrib package.

p.s. My JUnit is the latest version, 4.12.

my 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>

my Test class

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();
  }
}

In CDPlayerTest.class, I tried to use SystemOutRule, but my IDE (IntelliJ IDEA) reminds me that this class does not exist, and I could not find it in the "Maven Artifact Search".

My project Structure

Answer 1

SystemOutRule is part of the System Rules project by Stefan Birkner. It is not an official part of JUnit, but is open sourced, freely available and seems to be well maintained.

It's published to Maven Central, and you can get the latest version by adding the following dependency to your pom.xml file:

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