jacoco-maven-plugin not excluding test classes - jacoco

Question

Jacoco reports for this project contain line coverage for test classes, despite attempting to exclude tests as below
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.3</version>
<configuration>
<excludes>
<exclude>**/*Test.*</exclude>
</excludes>
</configuration>
<executions>
<execution>
<configuration>
<excludes>
<exclude>**/*Test.*</exclude>
</excludes>
</configuration>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<configuration>
<excludes>
<exclude>**/*Test.*</exclude>
</excludes>
</configuration>
<id>report</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>jacoco-check</id>
<goals>
<goal>check</goal>
</goals>
<configuration>
<rules>
<rule implementation="org.jacoco.maven.RuleConfiguration">
<excludes>
<exclude>**/*Test.*</exclude>
</excludes>
<element>CLASS</element>
<limits>
<limit implementation="org.jacoco.report.check.Limit">
<counter>LINE</counter>
<value>COVEREDRATIO</value>
<minimum>0.94</minimum>
</limit>
<limit implementation="org.jacoco.report.check.Limit">
<counter>BRANCH</counter>
<value>COVEREDRATIO</value>
<minimum>0.85</minimum>
</limit>
</limits>
</rule>
</rules>
</configuration>
</execution>
</executions>
</plugin>
The above pom is basically us shotgunning the config with solutions from existing StackOverflow questions, but none of them are working.
Any feedback would be much appreciated!

Answer 1

In absence of Minimal Complete Reproducible Example one can only guess how your test files are placed in your project and why they are shown in report, because jacoco-maven-plugin doesn't show test classes in report by default - here is proof:
for the following pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.3</version>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
src/main/java/Example.java
class Example {
void sayHello() {
System.out.println("Hello, World!");
}
}
and src/test/java/ExampleTest.java
import org.junit.Test;
public class ExampleTest {
#Test
public void test() {
new Example().sayHello();
}
}
execution of
mvn clean verify
generates following report that as you can see doesn't contain src/test/java/ExampleTest.java:
Trying to blindly guess, one can assume that your project has non-standard structure where the above Example.java and ExampleTest.java reside in the same src directory and you have following pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src</sourceDirectory>
<testSourceDirectory>${project.basedir}/src</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.3</version>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
then execution of mvn clean verify indeed will produce following report that contains ExampleTest.java
however in this case following exclusion of **/*Test.*
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src</sourceDirectory>
<testSourceDirectory>${project.basedir}/src</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.3</version>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
<goal>report</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*Test.*</exclude>
</excludes>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
works just fine