带有 Ant junitlauncher 的 JUnit 5：NoClassDefFoundError：org/junit/platform/launcher/core/LauncherFactory答案

【问题标题】：JUnit 5 with Ant junitlauncher: NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory带有 Ant junitlauncher 的 JUnit 5：NoClassDefFoundError：org/junit/platform/launcher/core/LauncherFactory
【发布时间】：2018-08-05 19:12:00
【问题描述】：

我想结合 ant 执行 junit5 测试，特别是 junitlauncher

这是我的项目结构：

这是我的构建文件：

<?xml version="1.0" encoding="UTF-8"?>
<project default="test" name="test">
    <property name="src.dir" value="${basedir}/src" />
    <property name="output.dir" value="${basedir}/build" />

    <!-- PATH DEFINITIONS -->
    <path id="junit5.classpath">
        <fileset dir="${basedir}/lib/" />
    </path>
    <path id="test.classpath">
        <path refid="junit5.classpath" />
        <fileset dir="${output.dir}">
            <include name="**/*.class" />
        </fileset>
    </path>

    <target name="clean">
        <delete dir="${output.dir}" />
    </target>

    <target name="compile" depends="clean">
        <mkdir dir="${output.dir}" />
        <mkdir dir="${output.dir}/report" />
        <javac srcdir="${src.dir}" destdir="${output.dir}" includeantruntime="false">
            <!-- test libs -->
            <classpath>
                <path refid="junit5.classpath" />
            </classpath>
        </javac>
    </target>

    <target name="test" depends="compile">
        <pathconvert property="classpathProp" refid="test.classpath"/>
        <echo>Classpath is ${classpathProp}</echo>
        <echo>Running junit tests...</echo>
        <junitlauncher>
            <classpath refid="test.classpath" />
            <test name="test.SomeClassTest" />
        </junitlauncher>
    </target>
</project>

当我尝试运行测试任务时，我可以看到类路径：

Classpath is 
/Users/some-username/Documents/workspace/test/lib/junit-jupiter-api-5.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-jupiter-engine-5.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-jupiter-migrationsupport-5.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-jupiter-params-5.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-platform-commons-1.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-platform-engine-1.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-platform-launcher-1.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-platform-runner-1.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-platform-suite-api-1.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit-vintage-engine-5.3.0-SNAPSHOT.jar:
/Users/some-username/Documents/workspace/test/lib/junit.jar:
/Users/some-username/Documents/workspace/test/lib/org.apiguardian_1.0.0.v20180327-1502.jar:
/Users/some-username/Documents/workspace/test/lib/org.hamcrest.core_1.3.0.v20180420-1519.jar:
/Users/some-username/Documents/workspace/test/lib/org.opentest4j_1.0.0.v20180327-1502.jar:
/Users/some-username/Documents/workspace/test/build/test/SomeClass.class:
/Users/some-username/Documents/workspace/test/build/test/SomeClassTest.class:
/Users/some-username/Documents/workspace/test/build/test/TestSuite.class

接着是：

构建失败 /Users/some-username/Documents/workspace/test/build.xml:36: java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory

您可以在此处找到 Eclipse 项目存档：https://drive.google.com/file/d/161rYTopmqM3JMqv8kvM6VjJbG1sm-3k2/view?usp=sharing

我怎样才能让它工作？我错过了什么？

【问题讨论】：

您是否按照此处ant.apache.org/manual/Tasks/junitlauncher.html 中的说明进行操作？尤其是开头的行：“将所有这些相关的 jar 与 ant-junitlauncher.jar 一起放在 ANT_HOME/lib 目录中，或者将 ant-junitlauncher.jar 留在 ANT_HOME/lib 目录中，并通过传递它们将所有其他相关的 jar 包含在类路径中作为 -lib 选项，同时调用 Ant"... 也可以查看 github.com/junit-team/junit5-samples/tree/master/…
感谢输入。确实，谢谢提示。没看到，虽然我读了文档。我会检查并发布反馈

标签： java junit ant junit5 junit-runner

【解决方案1】：

我遇到了同样的问题，直接在 ant 调用中手动处理库，例如“ant -lib lib/”。

【讨论】：

ant -lib /myHome/junitLibs/ 指向包含所有 jar 的目录的选项确实对我有用。包含相同目录的junitlauncher标签中嵌套的classpath标签或包含该目录所有jar的文件集根本不起作用。

【解决方案2】：

Junit5 测试需要不同的 ant 标签。检查https://ant.apache.org/manual/Tasks/junitlauncher.html

这是我的蚂蚁代码：

<target name="runTests" depends="compile,jar">      
    <junitlauncher printsummary="yes" haltonfailure="no">           
        <classpath refid="classpath.base" />  
        <classpath>
            <!-- the test classes themselves -->
            <pathelement location="${build}"/>
        </classpath>
        
        <!-- test by test - class -->           
        <!--<test name="TestPackage.ConcatTest" haltonfailure="no" /> -->   
        
        <!-- run all found tests in dir with classes -->           
        <testclasses outputdir="../report">
                        <fileset dir="${build}"/>
                        <listener type="legacy-brief" sendSysOut="true"/>
                        <listener type="legacy-xml" sendSysErr="true" 
sendSysOut="true"/>

         </testclasses>
    </junitlauncher>
</target>

【讨论】：