使用Cobertura进行覆盖测试应注意的几个细节

flashcloud

使用Cobertura中，编写build.xml时,请注意如下两个细节：
1.<javac debug="yes" srcdir="${source.dir}" destdir="${classes.dir}" classpathref="build.classpath" />如上代码所示，请增加debug="yes"
如果无此属性，则在生成的覆盖报告中，所有类的 Line Coverage是N/A。同时注意观察Ant的构建输出，提示"[cobertura-instrument] WARN   visitEnd， No line number information found for class cn.com.sungole.medapp.Web.App.  Perhaps you need to compile with debug=true?">。

2.<classpath location="${instrumented.dir}" /><classpath><path refid="build.classpath"></path><pathelement location="${test.classes.dir}" /><pathelement location="${classes.dir}" /></classpath>
请在junit中注意添加“<classpath location="${instrumented.dir}" />”，并注意与下边classpath的顺序，不能颠倒。
如果无此节点，则生成的覆盖报告中，所有类的 Line Coverage均为0%。
同时,Ant的构建正确输出中
    [junit] Running cn.com.sungole.medapp.domain.test.BillTest
    [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 2.593 sec
    [junit] Cobertura: Loaded information on 10 classes.
    [junit] Cobertura: Saved information on 10 classes.
将无最后两行输出信息。

完整的配置示例：

<?xml version="1.0"?><project name="coberturaSample1"><property name="default.target.dir" value="target" /><property name="classes.dir" value="${default.target.dir}/classes" /><property name="test.classes.dir" value="${default.target.dir}/test-classes" /><property name="test.report.dir" value="${default.target.dir}/test-reports" /><property name="lib.dir" value="${basedir}/lib" /><property name="javadoc.dir" value="${default.target.dir}/apidocs" /><property name="source.dir" value="src" /><property name="test.source.dir" value="test" /><property name="test.pattern" value="**/**Test.java" /><!-- Coverage reports are deposited into these directories --><property name="cobertura.dir" value="${default.target.dir}/cobertrua" /><!-- Instrumented classes are deposited into this directory --><property name="instrumented.dir" value="instrumented" /><path id="classpath"><fileset dir="${lib.dir}" includes="**/*.jar" /></path><path id="cobertura.classpath"><fileset dir="${lib.dir}"><include name="cobertura.jar" /><include name="*.jar" /></fileset></path><taskdef classpathref="cobertura.classpath" resource="tasks.properties"></taskdef><target name="clean"><delete dir="${classes.dir}" quiet="true" /><delete dir="${test.classes.dir}" /><delete dir="${default.target.dir}" /></target><target name="init" depends="clean"><mkdir dir="${classes.dir}" /><mkdir dir="${test.classes.dir}" /><mkdir dir="${javadoc.dir}" /><mkdir dir="${default.target.dir}" /><mkdir dir="${instrumented.dir}" /><path id="build.classpath"><fileset dir="${lib.dir}"><include name="**/*.jar" /></fileset><fileset dir="${default.target.dir}"><include name="**/*.jar" /></fileset></path></target><target name="compile-source" depends="init" description="compiles all .java files in source directory"><javac debug="yes" srcdir="${source.dir}" destdir="${classes.dir}" classpathref="build.classpath" /></target><target name="instrument" depends="compile-source"><delete file="cobertura.ser" /><delete file="${instrumented.dir}" /><!--Instrument the application classes, writing the instrumented classes into ${build.instrumented.dir}.--><cobertura-instrument todir="${instrumented.dir}"><ignore regex="org.apache.log4j.*" /><fileset dir="${classes.dir}"><!-- Instrument all the application classes, but don't instrument the test classes.--><include name="**/*.class" /><exclude name="**/*Test.class" /></fileset></cobertura-instrument></target><target name="jar" depends="instrument" description="生成jar 文件。Comppresstion .jar file"><jar jarfile="${default.target.dir}/${ant.project.name}.jar" basedir="${classes.dir}"></jar></target><target name="complie-tests" depends="jar" description="compiles all .java files in test directory "><javac debug="yes" srcdir="${test.source.dir}" destdir="${test.classes.dir}" classpathref="build.classpath"></javac></target><target name="javadoc" depends="init"><javadoc author="true" use="true" version="true" charset="gbk" sourcepath="${source.dir}" classpathref="build.classpath" destdir="${javadoc.dir}"></javadoc></target><target name="test" depends="complie-tests" description="runs JUnit tests"><mkdir dir="${test.report.dir}" /><copy file="src/hibernate.cfg.xml" todir="target/classes" /><copy file="src/log4j.properties" todir="target/classes" /><copy todir="target/classes"><fileset dir="src" /><globmapper from="*.hbm.xml" to="*.hbm.xml" /></copy><junit haltonfailure="no" printsummary="on" fork="yes" dir="${basedir}"><sysproperty key="basedir" value="${basedir}"/><formatter type="xml"/><!--Note the classpath order: instrumented classes are before theoriginal (uninstrumented) classes.  This is important.如果缺少此行,则在覆盖率报告中,所有的类会出现"Line Coverage 为 0%"的现象--><classpath location="${instrumented.dir}" /><classpath><path refid="build.classpath"></path><pathelement location="${test.classes.dir}" /><pathelement location="${classes.dir}" /></classpath><formatter type="xml" /><batchtest todir="${test.report.dir}">                <fileset dir="${test.source.dir}">                      <include name="${test.pattern}" />                  </fileset></batchtest></junit></target><target name="converage-check"><cobertura-check branchrate="40" totallinerate="100" /></target><target name="converage-report"><cobertura-report srcdir="${source.dir}" destdir="${cobertura.dir}" format="html"/></target><target name="alternate-coverage-report">    <!--              Generate a series of HTML files containing the coverage              data in a user-readable form using nested source filesets.          --><cobertura-report destdir="${cobertura.dir}"><fileset dir="${source.dir}"><include name="**/*.java"/></fileset></cobertura-report></target><target name="coverage" depends="jar,instrument,test,converage-report,alternate-coverage-report"></target><target name="all" depends="coverage,javadoc" /></project>