SystemOutRule 和 DEBUG 堆栈的问题

Question

嘿，我在 JUnit (4.12) 中的 SystemOutRule 日志和测试有问题。

我有简单的测试类：

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());
    }
}

我期望的输出是：“我正在扮演防守者”，但 SystemOutRule 给出了一个完整的跟踪堆栈，例如：

18:37:32.501 [main] 调试 org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener

• 测试方法之前：上下文 [DefaultTestContext@7ce3cb8e testClass = FootballerConfigTest，testInstance = com.example.demo.FootballerConfigTest@1139b2f3，testMethod = getPosition@FootballerConfigTest，testException = [null]，mergedContextConfiguration = [MergedContextConfiguration@78b66d36 testClass = FootballerConfigTest，位置 = '{}'，类 = '{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.tes t.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@16aa0a0a], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', 父 = [ null]]，attributes = map[[empty]]]，用@DirtiesContext [false]注释的类，模式[null]，用@DirtiesContext [false]注释的方法，模式[null]。 18:37:32.514 [main] 调试 org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate
• 从缓存中检索 ApplicationContext [1233990028]，键为 [[MergedContextConfiguration@78b66d36 testClass = FootballerConfigTest，locations = '{}'，classes = '{class config.FootballerConfig}'，contextInitializerClasses = '[]'，activeProfiles = '{ }'，propertySourceLocations = '{}'，propertySourceProperties = '{}'，contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@51931956，org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$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] DEBUG org.springframework.test.context.cache - Spring 测试 ApplicationContext 缓存统计：[DefaultContextCache@455b6df1 size = 1，maxSize = 32，parentContextCount = 0，hitCount = 2，missCount = 1] 18:37:32.516 [main] 调试 org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate
• 从缓存中检索 ApplicationContext [1233990028]，键为 [[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$Customizer@16aa0a0a], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 18:37:32.516 [main] DEBUG org.springframework.test.context.cache - Spring 测试 ApplicationContext 缓存统计：[DefaultContextCache@455b6df1 size = 1，maxSize = 32，parentContextCount = 0，hitCount = 3，missCount = 1] 18:37:33.290 [main] 调试 org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate
• 从缓存中检索 ApplicationContext [1233990028]，键为 [[MergedContextConfiguration@78b66d36 testClass = FootballerConfigTest，locations = '{}'，classes = '{class config.FootballerConfig}'，contextInitializerClasses = '[]'，activeProfiles = '{ }'，propertySourceLocations = '{}'，propertySourceProperties = '{}'，contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@51931956，org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$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] DEBUG org.springframework.test.context.cache - Spring 测试 ApplicationContext 缓存统计：[DefaultContextCache@455b6df1 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 4, missCount = 1] 我是防守球员

我做错了什么？

Answer 1

好的。我做到了。在 getPosition() 方法中使用 log.clear() 就足够了。

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