ClassNotFoundException - 运行ant-junit时 [英] ClassNotFoundException - when running ant-junit

问题描述

我正在为实际应用程序创建一个概念证明，任务是运行ant-junit测试，而不需要添加全局环境。我已经在蚂蚁中达到了，但是我遇到以下异常。 ClassTest.java是具有单元测试用例的java类。 （Junit 3.0风格）。我不知道为什么ant-junit找不到在批处理任务中提到路径的课程。

I'm trying to create a Proof of concept for the actual application, The task is to run ant-junit tests without adding stuff to the global environment. I've achieved it so far in ant, but, I'm stuck with the following exception. ClassTest.java is the java class that has sample unit testcase. (Junit 3.0 style). I'm not sure why ant-junit does not find the class inspite of mentioning the paths in the batchrun task.

项目结构

运行ant-junit任务时，我得到以下异常。

I get the following exception when running ant-junit task.

Testsuite: ClassTest
Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 0 sec

    Caused an ERROR
ClassTest
java.lang.ClassNotFoundException: ClassTest
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:249)
    at org.eclipse.ant.internal.launching.remote.EclipseSingleCheckExecutor.executeTargets(EclipseSingleCheckExecutor.java:30)
    at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:424)
    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:138)

我的ant build.xml文件是

My ant build.xml file is

<project name="Java project build" default="build">
<property name="project.local.directory" value="C:\Users\usrpao\workspace\Ant" />
<property name="src.path" value="${project.local.directory}/src" />
<property name="lib.path" value="${project.local.directory}/lib" />
<property name="dest.path" value="${project.local.directory}/target" />
<property name="junit.output.dir" value="${project.local.directory}/junit" />

<path id="classpath.test">
    <fileset dir="lib">
        <include name="**/*.jar" />
    </fileset>
</path>

<!--<taskdef name="junit" classname="org.apache.tools.ant.taskdefs.optional.junit.JUnitTask">
    <classpath refid="classpath.test" />
</taskdef> -->

<path id="MyProject.classpath">
    <pathelement location="lib/ant-junit.jar" />
    <pathelement location="lib/junit.jar" />
        <pathelement location="bin/*.*"/>
</path>

<path id="lib.classpath">
    <pathelement location="lib/ant-junit.jar" />
    <pathelement location="lib/junit.jar" />
</path>

<target name="build" depends="clean">
    <javac srcdir="${src.path}" destdir="${dest.path}" classpathref="lib.classpath">
    </javac>
    <antcall target="test">
    </antcall>
</target>

<target name="clean">

</target>

<target name="test">
    <pathconvert property="testoutput" refid="classpath.test" />
    <echo>Path = ${testoutput}</echo>
    <mkdir dir="${junit.output.dir}" />
    <junit haltonerror="false" showoutput="true">

        <classpath refid="MyProject.classpath">
        </classpath>
        <batchtest todir="${junit.output.dir}">
            <formatter type="plain" />
            <fileset dir="${src.path}/com/ant/test">
                <include name="**/*Test*.java" />
            </fileset>
        </batchtest>

    </junit>
</target>

推荐答案

您的类路径正在引用 bin 目录，而类实际上位于目标目录下。您应该更改 MyProject.classpath 引用以包含 $ {project.local.directory} / target ：

Your classpath is referencing the bin directory while the classes are actually under the target directory. You should change the MyProject.classpath reference to include ${project.local.directory}/target:

<path id="MyProject.classpath">
   <pathelement location="lib/ant-junit.jar" />
   <pathelement location="lib/junit.jar" />
   <dirset dir="${project.local.directory}">
        <include name="target"/>
    </dirset>
</path>

此外，您应该更改 fileset 元素在 junit 任务中，通过删除与测试类的包名相对应的文件夹，否则您仍然会收到一个 ClassNotFoundException ：

In addition, you should change the fileset element inside the junit task by removing the folders corresponding to the package name of the test class, otherwise you will still get a ClassNotFoundException:

<junit haltonerror="false" showoutput="true">

    <classpath refid="MyProject.classpath">
    </classpath>
    <batchtest todir="${junit.output.dir}">
        <formatter type="plain" />
        <fileset dir="${src.path}">  <!-- remove com/ant/test corresponding to package name -->
            <include name="**/*Test*.java" />
        </fileset>
    </batchtest>

</junit>

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