1 JaCoCo Introduction
JaCoCo is EclEmma team based on years of coverage of library uses lessons learned and developed an open source Java library code coverage.
2 Maven single access module
Add the following in the project's pom.xml file:
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.4</version>
<executions>
<execution>
<id>jacoco-initialize</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>jacoco-site</id>
<phase>package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
Perform Run As Maven build:
clean install
Find index.html file in the project target / site / jacoco directory, you can view the report.
3 Maven multiple access module
Maven multi-module program refers to the presence Sons associated plurality of such projects pom.xml file exists, the parent project pom.xml file comprises a plurality of <module> tag, which indicates which sub-modules, sub pom. xml inherit the parent project configuration dependent, by <parent> tag can know who its parent module Yes.
3.1 parent pom-dependent increase
Find parent pom.xml file in a multi-module project, add the following:
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.4</version>
</plugin>
</plugins>
</pluginManagement>
</build>
3.2 New sub-module coverage
The module adds all dependent on project units to be tested, for example, add a jacoco-coverage of sub-module, add the following in the pom.xml file:
Increase <dependency> specify which statistics module
<dependencies>
<dependency>
<groupId>org.sonatype.mavenbook.multi</groupId>
<artifactId>simple-weather</artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.sonatype.mavenbook.multi</groupId>
<artifactId>simple-webapp/artifactId>
<version>1.0.0-SNAPSHOT</version>
</dependency>
</dependencies>
Add jacoco-maven-plugin
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.4</version>
<executions>
<execution>
<id>jacoco-initialize</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<phase>verify</phase>
<goals>
<goal>report-aggregate</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
3.3 pom increase the parent module
<modules>
<module>simple-weather</module>
<module>simple-webapp</module>
<module>jacoco-coverage</module>
</modules>
Perform Run As Maven build:
clean install
Index.html file is found in sub jacoco-coverage generated target / site under / jacoco-aggregate directory and open to view reports.
The following gives an official website provides reports :
