maven-dependency-plugin不显示测试范围的依赖关系

Question

我试图从命令行显示我正在使用maven-dependency-plugin版本3.1.2处理的项目的完整依赖关系树，但是mvn dependency:tree目标(以及来自maven-dependency-plugin的任何其他目标)都没有显示test依赖关系。插件(https://maven.apache.org/plugins/maven-dependency-plugin/tree-mojo.html)的文档指出，默认情况下包含所有作用域，因此不需要使用-Dscope=test (但添加此参数时，输出不会改变)。

我已经用一个干净的.m2存储库运行了这个代码，没有使用settings.xml文件(以确保所有工件都直接来自repo.maven.apache.org)。

我使用maven 3.6.2在linux环境(CentOS 7)和Oracle Java 1.8.0_144上运行

这是我的POM：

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.sw-eval</groupId>
  <artifactId>cayenne-eval</artifactId>
  <version>1.0.0-SNAPSHOT</version>

  <dependencies>
    <dependency>
      <groupId>org.apache.cayenne</groupId>
      <artifactId>cayenne-server</artifactId>
      <version>4.2.M2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.cayenne</groupId>
      <artifactId>cayenne-di</artifactId>
      <version>4.2.M2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.cayenne</groupId>
      <artifactId>cayenne-dbsync</artifactId>
      <version>4.2.M2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.cayenne</groupId>
      <artifactId>cayenne-client</artifactId>
      <version>4.2.M2</version>
    </dependency>
  </dependencies>

</project>

下面是我从运行命令mvn dependency:tree得到的输出

[INFO] Scanning for projects...
[INFO] 
[INFO] ----------------------< com.sw-eval:cayenne-eval >----------------------
[INFO] Building cayenne-eval 1.0.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ cayenne-eval ---
[INFO] com.sw-eval:cayenne-eval:jar:1.0.0-SNAPSHOT
[INFO] +- org.apache.cayenne:cayenne-server:jar:4.2.M2:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] +- org.apache.cayenne:cayenne-di:jar:4.2.M2:compile
[INFO] +- org.apache.cayenne:cayenne-dbsync:jar:4.2.M2:compile
[INFO] |  +- org.apache.cayenne:cayenne-project:jar:4.2.M2:compile
[INFO] |  \- net.java.dev.inflector:inflector:jar:0.7.0:compile
[INFO] \- org.apache.cayenne:cayenne-client:jar:4.2.M2:compile
[INFO]    +- com.caucho:hessian:jar:4.0.63:compile
[INFO]    \- org.apache.cayenne:cayenne-rop-server:jar:4.2.M2:compile
[INFO]       +- org.apache.cayenne:cayenne-web:jar:4.2.M2:compile
[INFO]       \- org.slf4j:slf4j-simple:jar:1.7.25:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.951 s
[INFO] Finished at: 2020-11-25T08:53:17-07:00
[INFO] ------------------------------------------------------------------------

但是，在引用cayenne-server pom时，有许多标记为test的依赖项未在输出中显示(具体而言，以下是cayenne-server的直接依赖项，请参阅https://search.maven.org/artifact/org.apache.cayenne/cayenne-server/4.2.M2/jar)：

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.cayenne.build-tools</groupId>
            <artifactId>cayenne-test-utilities</artifactId>
            <version>${project.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-mock</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.mockrunner</groupId>
            <artifactId>mockrunner-jdbc</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <!-- this one have old Xerces dependency that clashes with JDK's one -->
                    <groupId>nekohtml</groupId>
                    <artifactId>nekohtml</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>xmlunit</groupId>
            <artifactId>xmlunit</artifactId>
            <scope>test</scope>
        </dependency>

那么，在显示这些test-scoped依赖项时，是否需要启用我遗漏的内容，或者这是cayenne-server依赖项所特有的奇怪工件吗？

提前感谢！

Answer 1

作用域test的依赖关系是不可传递的。

依赖项的test依赖项不是依赖项树的一部分。它们被Maven忽略。