我试图在我的蚂蚁脚本中运行Cobertura。一切都是成功的（源代码构建，junit测试，cobertura报告（xml / html）;但在html报告中，代码覆盖率始终为0％......
Ant脚本：make-instrument
<!-- Make instrument for Cobertura engine -->
<target name="make-instrument">
<!-- Remove the coverage data file and any old instrumentation. -->
<delete file="${cobertura.ser}" />
<!-- Instrument the application classes, writing the instrumented classes into ${build.instrumented.dir}. -->
<cobertura-instrument todir="${report.cobertura.dir}">
<!-- The following line causes instrument to ignore any source line containing a reference to log4j,
for the purposes of coverage reporting. -->
<ignore regex="org.apache.log4j.*" />
<fileset dir="${webcontent.dir}/WEB-INF/classes">
<!-- Instrument all the application classes, but don't instrument the test classes. -->
<include name="**/*.class" />
<exclude name="**/*Test.class" />
</fileset>
</cobertura-instrument>
</target>
Ant脚本：make-instrument
<target name="install-cobertura" if="is-hudson-env">
<path id="cobertura.classpath">
<fileset dir="${user.home.sharehunter.dir}/cobertura-${cobertura.rev}">
<include name="**/cobertura.jar" />
<include name="**/*.jar" />
</fileset>
</path>
<taskdef resource="tasks.properties" classpathref="cobertura.classpath" />
</target>
Ant脚本：junit
<target name="run-tests" depends="make-instrument">
<path id="classpath.test">
<path path="${webcontent.dir}/WEB-INF/classes" />
<pathelement location="${webcontent.dir}/WEB-INF/classes" />
<fileset dir="${lib.dir}" includes="**/*.jar" />
<path location="${webcontent.dir}/WEB-INF/classes" />
<path location="${webcontent.dir}/WEB-INF" />
<path location="${webcontent.dir}" />
</path>
<junit fork="yes" failureProperty="test.failed">
<classpath refid="classpath.test" />
<classpath location="${user.home.dir}/junit-${junit.rev}.jar" />
<!-- Specify the name of the coverage data file to use.
The value specified below is the default. -->
<sysproperty key="net.sourceforge.cobertura.datafile" file="${cobertura.ser}" />
<!-- Note the classpath order: instrumented classes are before the original (uninstrumented) classes. -->
<classpath location="${report.cobertura.dir}" />
<!--
The instrumented classes reference classes used by the
Cobertura runtime, so Cobertura and its dependencies
must be on your classpath.
-->
<classpath refid="cobertura.classpath" />
<!-- Generate xml files for each junit tests runs -->
<formatter type="xml" />
<batchtest todir="${report.junit.dir}">
<fileset dir="${webcontent.dir}/WEB-INF/classes">
<include name="**/*Test.class" />
</fileset>
</batchtest>
</junit>
<!-- Generate Cobertura xml file containing the coverage data -->
<cobertura-report format="xml" srcdir="${src.main.java.dir}" destdir="${report.cobertura.dir}" datafile="${cobertura.ser}" />
<!-- Generate Cobertura html file report containing the coverage data -->
<cobertura-report format="html" srcdir="${src.main.java.dir}" destdir="${report.cobertura.dir}" datafile="${cobertura.ser}" />
</target>
答案 0 :(得分：4)
这是Cobertura FAQ所说的
当我生成报道报告时，为什么它们总是在任何地方显示0％的覆盖率？
Cobertura在生成报告时可能使用了错误的.ser文件。当您修改课程时，Cobertura会生成一个.ser文件，其中包含有关每个课程的基本信息。当您的测试运行时，Cobertura会为此相同的数据文件添加其他信息。如果检测类在运行时找不到数据文件，那么它们将创建一个新文件。在检测，运行和生成报告时，使用相同的cobertura.ser文件非常重要。
执行此操作的最佳方法是在运行测试时指定数据文件的位置。您应该将-Dnet.sourceforge.cobertura.datafile=${basedir}/cobertura.ser sysproperty传递给JUnit任务。
另一个常见问题是cobertura.ser文件已删除，但之前已检测的类也未删除。每次删除coverage数据文件时，都应删除所有已检测的类。
答案 1 :(得分：1)
好的，我发现了问题。确定有这个：
<!--
Note the classpath order: instrumented classes are before the
original (uninstrumented) classes. This is important.
-->
<classpath location="${instrumented.dir}" />
<classpath location="${classes.dir}" />
检测类必须在原始（未经检测）类之前。
答案 2 :(得分：1)
我尝试过类似的方式。我还在实际源代码之前使用了检测代码，但是我在报告文件中得到了0％。
<macrodef name="coberturaTestMacro">
<attribute name="moduleName" />
<attribute name="classpath.module" />
<attribute name="classpath.junit" />
<attribute name="failOnCoverageFall" />
<attribute name="fileCoberturaData"/>
<sequential>
<path id="classpathCobertura">
<fileset dir="${homeCobertura}">
<include name="cobertura.jar" />
<include name="lib/**/*.jar" />
</fileset>
</path>
<taskdef classpathref="classpathCobertura" resource="tasks.properties" />
<property name="cob.instrumented.dir" value="target/cobertura/instrumented" />
<delete dir="target/cobertura" />
<cobertura-instrument todir="${cob.instrumented.dir}" datafile="@{fileCoberturaData}" >
<fileset dir="target/classes">
<include name="**/*.class" />
</fileset>
</cobertura-instrument>
<delete dir="target/reports/test" />
<mkdir dir="target/cobertura/reports" />
<junit printsummary="false" failureproperty="junit.failure"
maxmemory="512m" fork="true" forkmode="perTest">
<jvmarg value="-Djava.awt.headless=true" />
<classpath location="${homeCobertura}/cobertura.jar" />
<classpath location="${cob.instrumented.dir}" />
<classpath>
<path refid="@{classpath.module}" />
<path refid="@{classpath.junit}" />
</classpath>
<classpath path="target/test-classes" />
<batchtest todir="target/cobertura/reports/">
<fileset dir="src/test/java">
<include name="**/*Test.java" />
</fileset>
</batchtest>
</junit>
<cobertura-report srcdir="src/main/java" destdir="target/cobertura/reports/" />
<echo message="${line.separator}" />
<echo message="COVERAGE: @{moduleName} module..." />
<echo message="${line.separator}" />
<if>
<available file="target/cobertura/@{moduleName}-cobertura.properties" />
<then>
<var name="total.line-rate" file="target/cobertura/@{moduleName}-cobertura.properties" />
<cobertura-check haltonfailure="@{failOnCoverageFall}"
datafile="@{fileCoberturaData}" totallinerate="${total.line-rate}" />
</then>
</if>
<delete file="${dirBuild}/coverage-summary.properties" />
<cobertura-report datafile="@{fileCoberturaData}" destdir="target/cobertura/" format="summaryXml" />
<var name="total.line-rate" file="target/cobertura/coverage-summary.properties" />
<echo message="Total line coverage: ${total.line-rate}%" />
<propertyfile file="target/cobertura//@{moduleName}-cobertura.properties">
<entry key="total.line-rate" value="${total.line-rate}" type="int" />
</propertyfile>
</sequential>
</macrodef>
令人惊讶的是，生成的报告显示总覆盖率为2％，但摘要文件显示0％覆盖率。 旧的cobertura任务显示8％的覆盖率。我完全糊涂了:(
答案 3 :(得分：0)
可能它并不适用于所有人，但我遇到的类似问题是所有课程的覆盖率均为0。 在我的案例中有2个问题
1）从PATH读取错误的jdk 1.8版本。我更新了PATH以阅读1.6 jdk
2）它最初使用的是cobertura的1.8版本。我运行了构建，它将生成覆盖率报告，但所有类始终为0％。我更新了javac目标以包含
debug="true" debuglevel="vars,lines,source"参考：cobertura 0 coverage
然后再次运行构建，看到运行测试时出现错误，并将其追溯到cobertura 1.8版本的问题。
所以，我升级了
其他依赖性
1. jakarta-oro 2.0.8
2. log4j-1.2.9
之后再次执行任务，报告也没问题。