嘿，我对junit（4.12）中的systemoutrule日志和测试有问题。
我有一个简单的测试类：

package com.example.demo;

import config.FootballerConfig;

import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.contrib.java.lang.system.SystemOutRule;
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.*;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = FootballerConfig.class)
public class FootballerConfigTest {

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

    @Autowired
    private FootballerStats footballerStats;

    @Autowired
    private Footballer footballer;

    @Test
    public void footballerShouldNotBeNull() {
        assertNotNull(footballer);
    }

    @Test
    public void getPosition() {
        footballerStats.getPosition();
        Assert.assertEquals("I'm playing as defender", log.getLogWithNormalizedLineSeparator().trim());
    }
}

我期望的结果是：“我以防守球员的身份比赛”，但是systemoutrule给了所有人一个完整的赛道堆栈，比如：
18:37:32.501[main]调试org.springframework.test.context.support.abstractdirtiescontexttestexecutionlistener
测试前方法：上下文[defaulttestcontext@7ce3cb8e testclass=footballerconfigtest，testinstance=com.example.demo。footballerconfigtest@1139b2f3，测试方法=getposition@footballerconfigtest，testexception=[null]，mergedcontextconfiguration=[mergedcontextconfiguration@78b66d36 testclass=footballerconfigtest，locations='{}'，classes='{class config.footballerconfig}'，contextinitializerclasses='[]'，activeprofiles='{}'，propertysourcelocations='{}'，propertysourceproperties='{}'，contextcustomizers=set[org.springframework.boot.test.context.filter。excludefiltercontextcustomizer@51931956,org.springframework.boot.test.json。duplicatejsonobjectcontextcustomizerfactory$duplicatejsonobjectcontextcustomizer@51b7e5df，org.springframework.boot.test.mock.mockito。mockitocontextcustomizer@0，org.springframework.boot.test.autoconfigure.actuate.metrics。metricsexportcontextcustomizerfactory$disablemetricexportcontextcustomizer@45f45fa1,org.springframework.boot.test.autoconfigure.properties。propertymappingcontextcustomizer@0，org.springframework.boot.test.autoconfigure.web.servlet。webdrivercontextcustomizerfactory$customizer@16aa0a0a]，contextloader='org.springframework.test.context.support.delegatingsmartcontextloader'，父级=[null]]，属性=Mapempty，类用@dirtiescontext[false]注解，模式为[null]，方法用@dirtiescontext[false]注解，模式为[null]。18:37:32.514[main]调试org.springframework.test.context.cache.defaultcacheawarecontextloaderdelegate
已使用密钥从缓存中检索到applicationcontext[1233990028]mergedcontextconfiguration@78b66d36 testclass=footballerconfigtest，locations='{}'，classes='{class config.footballerconfig}'，contextinitializerclasses='[]'，activeprofiles='{}'，propertysourcelocations='{}'，propertysourceproperties='{}'，contextcustomizers=set[org.springframework.boot.test.context.filter。excludefiltercontextcustomizer@51931956，org.springframework.boot.test.json。duplicatejsonobjectcontextcustomizerfactory$duplicatejsonobjectcontextcustomizer@51b7e5df，org.springframework.boot.test.mock.mockito。mockitocontextcustomizer@0,org.springframework.boot.test.autoconfigure.actuate.metrics。metricsexportcontextcustomizerfactory$disablemetricexportcontextcustomizer@45f45fa1，org.springframework.boot.test.autoconfigure.properties。propertymappingcontextcustomizer@0，org.springframework.boot.test.autoconfigure.web.servlet。webdrivercontextcustomizerfactory$customizer@16aa0a0a],contextloader='org.springframework.test.context.support.delegatingsmartcontextloader'，parent=[null]18:37:32.514[main]调试org.springframework.test.context.cache-spring测试应用程序上下文缓存统计信息：[defaultcontextcache@455b6df1 size=1，maxsize=32，parentcontextcount=0，hitcount=2，misscont=1]18:37:32.516[main]调试org.springframework.test.context.cache.defaultcacheawarecontextloaderdelegate
已使用密钥从缓存中检索到applicationcontext[1233990028]mergedcontextconfiguration@78b66d36 testclass=footballerconfigtest，locations='{}'，classes='{class config.footballerconfig}'，contextinitializerclasses='[]'，activeprofiles='{}'，propertysourcelocations='{}'，propertysourceproperties='{}'，contextcustomizers=set[org.springframework.boot.test.context.filter。excludefiltercontextcustomizer@51931956，org.springframework.boot.test.json。duplicatejsonobjectcontextcustomizerfactory$duplicatejsonobjectcontextcustomizer@51b7e5df，org.springframework.boot.test.mock.mockito。mockitocontextcustomizer@0,org.springframework.boot.test.autoconfigure.actuate.metrics。metricsexportcontextcustomizerfactory$disablemetricexportcontextcustomizer@45f45fa1，org.springframework.boot.test.autoconfigure.properties。propertymappingcontextcustomizer@0，org.springframework.boot.test.autoconfigure.web.servlet。webdrivercontextcustomizerfactory$customizer@16aa0a0a],contextloader='org.springframework.test.context.support.delegatingsmartcontextloader'，parent=[null]18:37:32.516[main]调试org.springframework.test.context.cache-spring测试应用程序上下文缓存统计信息：[defaultcontextcache@455b6df1 size=1，maxsize=32，parentcontextcount=0，hitcount=3，misscont=1]18:37:33.290[main]调试org.springframework.test.context.cache.defaultcacheawarecontextloaderdelegate
已使用密钥从缓存中检索到applicationcontext[1233990028]mergedcontextconfiguration@78b66d36 testclass=footballerconfigtest，locations='{}'，classes='{class config.footballerconfig}'，contextinitializerclasses='[]'，activeprofiles='{}'，propertysourcelocations='{}'，propertysourceproperties='{}'，contextcustomizers=set[org.springframework.boot.test.context.filter。excludefiltercontextcustomizer@51931956，org.springframework.boot.test.json。duplicatejsonobjectcontextcustomizerfactory$duplicatejsonobjectcontextcustomizer@51b7e5df，org.springframework.boot.test.mock.mockito。mockitocontextcustomizer@0,org.springframework.boot.test.autoconfigure.actuate.metrics。metricsexportcontextcustomizerfactory$disablemetricexportcontextcustomizer@45f45fa1，org.springframework.boot.test.autoconfigure.properties。propertymappingcontextcustomizer@0，org.springframework.boot.test.autoconfigure.web.servlet。webdrivercontextcustomizerfactory$customizer@16aa0a0a],contextloader='org.springframework.test.context.support.delegatingsmartcontextloader'，parent=[null]18:37:33.290[main]调试org.springframework.test.context.cache-spring测试应用程序上下文缓存统计信息：[defaultcontextcache@455b6df1 size=1，maxsize=32，parentcontextcount=0，hitcount=4，我是防守队员
我做错什么了？