Minimum code coverage threshold in Jacoco Gradle

Question

How can I set the minimum code coverage in Jacoco Gradle?

I want the build to fail if it is not met.

Answer 1

The feature is now available. You simply need to apply the Gradle JaCoCo plugin and define coverage verification like this:

apply plugin: 'jacoco'  jacocoTestCoverageVerification {     violationRules {         rule {             limit {                 minimum = 0.7             }         }     } }  // to run coverage verification during the build (and fail when appropriate) check.dependsOn jacocoTestCoverageVerification 

The last line is very important as your build would otherwise not fail unless you explicitly run the jacocoTestCoverageVerification task.

More information on the kind of checks you may add is in the documentation of the plugin.

Answer 2

In an Android application this configuration works:

project: build.gradle

buildscript {     repositories {         google()         jcenter()         maven { url 'https://plugins.gradle.org/m2/' }     }     dependencies {         classpath "com.android.tools.build:gradle:3.1.4"         classpath "org.jacoco:org.jacoco.core:0.8.2"     } } 

app: build.gradle

ext.jacoco_version = '0.8.2' def configDir = "${project.rootDir}/config" def reportDir = "${project.buildDir}/reports" def mainSrc = "$project.projectDir/src/main/java" def fileFilter = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*', 'android/**/*.*'] def debugTree = fileTree(dir: "$project.buildDir/intermediates/classes/debug", excludes: fileFilter) //Jacoco jacocoTestReport apply plugin: 'jacoco' jacoco.toolVersion = jacoco_version task jacocoTestReport(type: JacocoReport, dependsOn: 'testDebugUnitTest') {     reports {         xml.enabled = false         html.enabled = true     }     sourceDirectories = files([mainSrc])     classDirectories = files([debugTree])     executionData = fileTree(dir: project.buildDir, includes: [             'jacoco/testDebugUnitTest.exec', 'outputs/code-coverage/connected/*coverage.ec'     ]) } task jacocoTestCoverageVerification(type: JacocoCoverageVerification, dependsOn: 'jacocoTestReport') {     sourceDirectories = files([mainSrc])     classDirectories = files([debugTree])     executionData = files("${buildDir}/jacoco/testDebugUnitTest.exec")     violationRules {         failOnViolation = true         rule {             limit {                 minimum = 0.7             }         }     } } 

We can execute it in commandline with:

./gradlew jacocoTestCoverageVerification 

I used gradle wrapper 4.4.