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：

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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