尝试从 ANT 运行 JUnit 测试时出现 java.lang.NoClassDefFoundError

Question

我在尝试使用以下 build.xml 中的 runtestsreport 任务从 ANT 运行我的 JUnit 测试时遇到 java.lang.NoClassDefFoundError 问题；我知道其他任务有效，只是实际运行测试才是问题所在。

我已经根据此处发布的问题尝试了很多调整，但我无法修复它；我真正需要的是一个可以配对的开发人员，但他们今天都回家了。

谁能帮忙？

build.xml 文件是

<property name="build" location="C:\<path on my machine>\workspace\ESS\build"/>
<property name="testsbuild" location="C:\<path on my machine>\workspace\ESS\build\esstestapp\tests"/>
<property name="frameworkbuild" location="C:\<path on my machine>\workspace\ESS\build\esstestapp\framework"/>
<property name="rawtestreports" location="C:\<path on my machine>\workspace\ESS\reports\raw"/>
<property name="htmltestreports" location="C:\<path on my machine>\workspace\ESS\reports\html"/>
<property name="reports" location="C:\<path on my machine>\workspace\ESS\reports"/>
<property name="src" location="C:\<path on my machine>\workspace\ESS\src"/>
<property name="testsrc" location="C:\<path on my machine>\workspace\ESS\src\esstestapp\tests"/>
<property name="seleniumtools" location="C:\<path on my machine>\workspace\ESS\tools\junit-4.8.2"/>
<property name="junittools" location="C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2"/>

<target name="init">   
    <tstamp/>   
    <mkdir dir="${build}"/>
    <mkdir dir="${rawtestreports}"/>
    <mkdir dir="${htmltestreports}"/>
</target> 

<path id="tools.classpath">
    <fileset dir="${seleniumtools}" includes="**/*.jar"/>   
    <fileset dir="${junittools}" includes="**/*.jar"/>
</path> 

<target name="compile" depends="init" description="compile the source" >    
    <javac srcdir="${src}" destdir="${build}" classpathref="tools.classpath" includeantruntime="false"/>
</target>

<target name="frameworkjar" depends="compile">        
    <jar destfile="${frameworkbuild}/jar/framework.jar" basedir="${frameworkbuild}" />        
</target>

<target name="testsjar" depends="compile">        
    <jar destfile="${testsbuild}/jar/tests.jar" basedir="${testsbuild}" />
</target>

<path id="test.classpath">
    <fileset dir="${seleniumtools}" includes="**/*.jar"/>   
    <fileset dir="${junittools}" includes="**/*.jar"/>
    <fileset dir="${testsbuild}/jar" includes="**/*.jar"/>
    <fileset dir="${frameworkbuild}/jar" includes="**/*.jar"/>
</path> 

<target name="runtests" depends="compile, frameworkjar, testsjar" description="runs the tests" >    
    <junit printsummary="yes" haltonfailure="no" showoutput="yes" fork="no"> 
        <classpath refid="test.classpath" />                 

        <batchtest fork="yes" todir="${rawtestreports}"> 
            <formatter type="xml"/> 
                <fileset dir="${testsrc}">
                    <include name="**/*.java"/> 
                </fileset> 
        </batchtest> 
    </junit>    
</target>

<target name="runtestsreport" depends="runtests">
    <junitreport todir="${reports}">
        <fileset dir="${rawtestreports}">
            <include name="TEST-*.xml" /> 
        </fileset>
        <report format="frames" todir="${htmltestreports}" /> 
    </junitreport>
</target>

<target name="clean" description="Clean up">
    <delete dir="${build}"/>    
    <delete dir="${reports}"/>
</target>

我收到此错误（以及每个测试类的此类错误）

Credentials (wrong name: esstestapp/tests/Credentials)

java.lang.NoClassDefFoundError: Credentials (wrong name: esstestapp/tests/Credentials)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)...

我已经在 -verbose 模式下运行 ant 来检查类路径，但我看不到问题（即使我知道它正盯着我看）

[junit] Implicitly adding C:\Program Files\apache-ant-1.8.2\lib\ant-launcher
.jar;C:\Program Files\apache-ant-1.8.2\lib\ant.jar;C:\Program Files\apache-ant-1
.8.2\lib\ant-junit.jar;C:\Program Files\apache-ant-1.8.2\lib\ant-junit4.jar to C
LASSPATH
[junit] Executing 'C:\Program Files\Java\jdk1.6.0_25\jre\bin\java.exe' with
arguments:
[junit] '-classpath'
[junit] Executing 'C:\Program Files\Java\jdk1.6.0_25\jre\bin\java.exe' with
arguments:
[junit] '-classpath'
[junit] 'C:\<path on my machine>\workspace\ESS\tools\junit-4.8.2\junit.jar;C:\User
s\waltersj\workspace\ESS\tools\junit-4.8.2\junitsrc.jar;C:\<path on my machine>\worksp
ace\ESS\tools\selenium-2.0rc2\apache-mime4j-0.6.jar;C:\<path on my machine>\workspace\
ESS\tools\selenium-2.0rc2\bsh-1.3.0.jar;C:\<path on my machine>\workspace\ESS\tools\se
lenium-2.0rc2\cglib-nodep-2.1_3.jar;C:\<path on my machine>\workspace\ESS\tools\seleni
um-2.0rc2\commons-codec-1.4.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2
.0rc2\commons-collections-3.2.1.jar;C:\<path on my machine>\workspace\ESS\tools\seleni
um-2.0rc2\commons-io-2.0.1.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.
0rc2\commons-lang-2.4.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\
commons-logging-1.1.1.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\
cssparser-0.9.5.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\guava-
r09.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\hamcrest-all-1.1.j
ar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\htmlunit-2.8.jar;C:\Use
rs\waltersj\workspace\ESS\tools\selenium-2.0rc2\htmlunit-core-js-2.8.jar;C:\User
s\waltersj\workspace\ESS\tools\selenium-2.0rc2\httpclient-4.0.2.jar;C:\Users\wal
tersj\workspace\ESS\tools\selenium-2.0rc2\httpcore-4.0.1.jar;C:\<path on my machine>\w
orkspace\ESS\tools\selenium-2.0rc2\httpmime-4.0.1.jar;C:\<path on my machine>\workspac
e\ESS\tools\selenium-2.0rc2\jcommander-1.13.jar;C:\<path on my machine>\workspace\ESS\
tools\selenium-2.0rc2\jna.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0
rc2\json-20080701.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\juni
t-dep-4.8.1.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\nekohtml-1
.9.14.jar;C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\sac-1.3.jar;C:\U
sers\waltersj\workspace\ESS\tools\selenium-2.0rc2\selenium-java-2.0rc2-srcs.jar;
C:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\selenium-java-2.0rc2.jar;C
:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\serializer-2.7.1.jar;C:\Use
rs\waltersj\workspace\ESS\tools\selenium-2.0rc2\testng-6.0.1-nobsh-noguice.jar;C
:\<path on my machine>\workspace\ESS\tools\selenium-2.0rc2\xalan-2.7.1.jar;C:\Users\wa
ltersj\workspace\ESS\tools\selenium-2.0rc2\xercesImpl-2.9.1.jar;C:\Users\walters
j\workspace\ESS\tools\selenium-2.0rc2\xml-apis-1.3.04.jar;C:\<path on my machine>\work
space\ESS\build\esstestapp\tests\jar\tests.jar;C:\<path on my machine>\workspace\ESS\b
uild\esstestapp\framework\jar\framework.jar;C:\<path on my machine>\workspace\ESS;C:\P
rogram Files\Java\jre6\lib\ext\QTJava.zip;C:\Program Files\apache-ant-1.8.2\lib\
ant-launcher.jar;C:\Program Files\apache-ant-1.8.2\lib\ant.jar;C:\Program Files\
apache-ant-1.8.2\lib\ant-junit.jar;C:\Program Files\apache-ant-1.8.2\lib\ant-jun
it4.jar'

任何能帮助我运行测试的人都将不胜感激。

谢谢

詹姆斯

更新

我观察到，如果我编辑 tests.classpath 以删除以下 2 行，那么我看到的错误会切换到 ClassNotFound，这是有道理的，因为它没有引用包含类的 .jar 文件。

<fileset dir="${testsbuild}/jar" includes="**/*.jar"/>
<fileset dir="${frameworkbuild}/jar" includes="**/*.jar"/>

tests.classpath 中存在上述两行，很高兴找到它们，但名称错误，我不知道如何修复。

Answer 1

由以下 jar 命令引起的问题：

<jar destfile="${testsbuild}/jar/tests.jar" basedir="${testsbuild}" />

testsbuild 属性应该设置为

<property name="testsbuild" location="C:\<path on my machine>\workspace\ESS\build"/>

说明

文件 Credentials.class 被编译为类 esstestapp.tests.Credentials。它需要作为文件在类路径中找到：

esstestapp/tests/Credentials.class