gradle中使用cobertura做代码覆盖(转)

gradle很好用，但是默认是没有代码覆盖功能的，只好自己写。曾经在网上找到过别人的一段脚本，虽然也能用，但是有一些不爽的地方，一个原因是它不支持对层级工程中全部代码的覆盖，另一个原因是它用替换build/classes/main里面的class文件，再依赖gradle的单元方式来实现的。我自己写了一个代码覆盖的脚本，可以避免这两个问题，代码如下：

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allprojects {     apply plugin:'idea' } subprojects {     apply plugin:'java'     apply plugin:'eclipse'     apply plugin:'maven'     apply plugin:'project-report'     sourceCompatibility = 1.6     targetCompatibility = 1.6     [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'     dependencies {         runtime 'org.slf4j:slf4j-log4j12:1.4.2@jar'         testCompile 'junit:junit:4.8.2'         testCompile 'org.easymock:easymock:3.0'         testRuntime module('net.sourceforge.cobertura:cobertura:1.9.4') {             dependencies "asm:asm:3.1", "oro:oro:2.0.8", "asm:asm-tree:3.0"         }         testRuntime 'log4j:log4j:1.2.13'         testRuntime('org.apache.ant:ant-junit:1.8.2'){transitive = false}     }     /* START 代码覆盖 */     task runCover(dependsOn: testClasses) << {         def codeCoverDir = new File(buildDir, "codeCover")         def codeCoverClassesDir = new File(codeCoverDir, "classes")         def codeCoverTestReportDir = new File(codeCoverDir, "testReport")         def codeCoverDataFile = new File(codeCoverDir, "cobertura.ser")         def originalClassesDir = new File(buildDir, "classes/main")         def unitTestClassesDir = new File(buildDir, "classes/test")         def projectPath = project.path         ant {             delete(dir: codeCoverDir, failonerror:false)             mkdir(dir: codeCoverDir)             mkdir(dir: codeCoverClassesDir)             mkdir(dir: codeCoverTestReportDir)             if (!unitTestClassesDir.exists()) {                 mkdir(dir: unitTestClassesDir)             }             taskdef(resource:'tasks.properties', classpath: configurations.testRuntime.asPath)             taskdef(name: 'junit', classname: 'org.apache.tools.ant.taskdefs.optional.junit.JUnitTask',                     classpath: configurations.testRuntime.asPath)             copy(todir: codeCoverClassesDir) {                 fileset(dir: originalClassesDir)             }             logger.lifecycle("cobertura-instrument: ${projectPath}")             'cobertura-instrument'(datafile:codeCoverDataFile) {                 fileset(dir: codeCoverClassesDir, includes:"**/*.class")             }             logger.lifecycle("junit: ${projectPath}")             junit(haltonfailure: true, showoutput: true, fork: true, forkmode:'once') {                 sysproperty(key: "net.sourceforge.cobertura.datafile", value: codeCoverDataFile)                 classpath {                     pathelement(path: configurations.testRuntime.asPath)                     pathelement(location: codeCoverClassesDir)                     pathelement(location: unitTestClassesDir)                 }                 formatter(type: 'plain')                 batchtest(todir: codeCoverTestReportDir) {                     fileset(dir: unitTestClassesDir, includes: "**/*Test.class")                 }             }         }     }     task reportCover(dependsOn: runCover) << {         def codeCoverDir = new File(buildDir, "codeCover")         def codeCoverReportDir = new File(codeCoverDir, "coverReport")         def codeCoverDataFile = new File(codeCoverDir, "cobertura.ser")         ant {             mkdir(dir: codeCoverReportDir)             taskdef(resource:'tasks.properties', classpath: configurations.testRuntime.asPath)             'cobertura-report'(destdir: codeCoverReportDir, format:'html', datafile:codeCoverDataFile, encoding:'utf8') {                 fileset(dir: "${projectDir}/src/main/java", includes: "**/*.java")             }         }     }     /* END */ } /**  * 在根目录的build/codeCover/coverReport目录里生成整个工程的代码覆盖报告。必须至少有一个子工程存在，才能正常执行  */ task reportCoverAll(dependsOn: subprojects.collect{"${it.path}:runCover"}) << {     def codeCoverDir = new File(buildDir, "codeCover")     def codeCoverReportDir = new File(codeCoverDir, "coverReport")     def codeCoverDataFile = new File(codeCoverDir, "cobertura.ser")     ant {         mkdir(dir: codeCoverReportDir)         taskdef(resource:'tasks.properties', classpath: subprojects.toArray()[0].configurations.testRuntime.asPath)         'cobertura-merge'(datafile: codeCoverDataFile) {             fileset(dir: rootDir, includes: "*/build/codeCover/cobertura.ser")         }         'cobertura-report'(destdir: codeCoverReportDir, format:'html', datafile:codeCoverDataFile, encoding:'utf8') {             subprojects.each {                 fileset(dir: "${it.projectDir}/src/main/java", includes: "**/*.java")             }         }     } }

实现的思路就是在每个子工程的build目录下生成codeCover目录，然后把testClasses生成的被测试的代码通过cobertura加工到这个目录下的子目录，再调用junit测试，最后生成报告，与gradle java插件里面的test任务没有任何关系。根工程里面的reportCoverAll可以把各子工程生成的cobertura.ser文件合并，生成统一的报告。

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1. 在Gradle中使用Cobertura
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http://sulong.me/2011/08/03/use_cobertura_in_gradle_in_a_better_way