Java 如何在这些单元测试中捕获通量的日志输出？

我正在检查这个项目中的示例代码

下面是源代码中的一个典型函数

@Test
public void delayElements() {
    CountDownLatch latch = new CountDownLatch(1);

    log.info("Starting");
    Flux.range(0, 5)
            .doOnNext(val -> log.info("Emitted {}", val))
            .delayElements(Duration.of(2, ChronoUnit.SECONDS))
            .subscribe(
                    tick -> log.info("Tick {}", tick),
                    (ex) -> log.info("Error emitted"),
                    () -> {
                        log.info("Completed");
                        latch.countDown();
                    });

    Helpers.wait(latch);
}

我希望能够看到日志输出，就像发出错误一样

然而，如果我运行mvn测试，我根本看不到任何标准输出

我曾尝试在surefire插件中启用日志捕获，但也没有取得任何效果

+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <configuration>
+            <redirectTestOutputToFile>true</redirectTestOutputToFile>
+          </configuration>
+        </plugin>

但产量仍然很高

$ mvn test
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< com.balamaci:reactor-playground >-------------------
[INFO] Building Reactor-Core Playground 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ reactor-playground ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/antkong/experiments/flux/reactor-core-playground/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ reactor-playground ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ reactor-playground ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ reactor-playground ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:3.0.0-M5:test (default-test) @ reactor-playground ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.657 s
[INFO] Finished at: 2020-08-21T18:27:58+10:00
[INFO] ------------------------------------------------------------------------

---

在这种情况下，如何捕获日志输出？

似乎在类路径上没有任何记录器实现。尝试添加以下内容：

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>

---

这里的问题似乎是类名中缺少测试词，所以根本就没有运行它们。mvn test-Dtest=Part02SimpleOperators这样的命令，您可以在其中提供一个名称，它工作得很好。

Thx获取答案，但它似乎不起作用。我已将mv测试输出添加到问题中。提供一个最小的、可重复的示例；我没有能力修复我看不见的代码。关于回购协议的链接存在疑问。我强烈建议在运行测试时使用反应堆测试项目。您将获得对的访问权限，以便可以在流上实际运行断言。

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>

<configuration>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoders are assigned the type
     ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="info" additivity="false">
        <appender-ref ref="STDOUT"/>
    </root>

</configuration>