Why doesn't Jacoco recognize unit test classes？

[Boyi Zhang]

Jacoco analyzed the unit test classes as if they were normal classes, resulting in a coverage of 0.（jacoco把单元测试类也当做普通类来分析，导致覆盖率为0。）

[Boyi Zhang]

https://github.com/zhangboyi/maven_demo.git

[Evgeny Mandrikov]

After

git clone https://github.com/zhangboyi/maven_demo.git

cd maven_demo

and checkout of the latest as of now commit

git checkout 494ee90cacd693c3a4a15d323bf709241d1da801

and uncommenting jacoco-maven-plugin in pom.xml

execution of

mvn verify

produces definitely not zeros as you can see below

[Evgeny Mandrikov]

And also for your information

JaCoCo version 0.7.5 that you use ( https://github.com/zhangboyi/maven_demo/blob/494ee90cacd693c3a4a15d323bf709241d1da801/pom.xml#L11 )

is 5 years old

and does not support latest Java versions.

Please use latest JaCoCo version.

[Boyi Zhang]

yes，I know. This way you can output the correct result.
but, I do it this way for ”ant task“,  resulting in a coverage of 0.

build.xml is  in https://github.com/zhangboyi/maven_demo/blob/master/src/main/resources/build.xml.

[Boyi Zhang]

https://github.com/zhangboyi/maven_demo/tree/test

I have met the following conditions：

The JaCoCo Ant tasks require

• Ant 1.7.0 or higher and
• Java 1.5 or higher (for both, the Ant runner and the test executor).

Looking forward to your reply. thanks.

[Boyi Zhang]

Started by user zhangboyi

Running as SYSTEM

Building in workspace /var/lib/jenkins/workspace/maven_test2

The recommended git tool is: NONE

No credentials specified

 > git rev-parse --is-inside-work-tree # timeout=10

Fetching changes from the remote Git repository

 > git config remote.origin.url https://github.com/zhangboyi/maven_demo.git # timeout=10

Fetching upstream changes from https://github.com/zhangboyi/maven_demo.git

 > git --version # timeout=10

 > git --version # 'git version 2.7.4'

 > git fetch --tags --progress https://github.com/zhangboyi/maven_demo.git +refs/heads/*:refs/remotes/origin/* # timeout=10

 > git rev-parse refs/remotes/origin/test^{commit} # timeout=10

Checking out Revision dbf6906123ce969f2e12f014a19419a4f3b39b69 (refs/remotes/origin/test)

 > git config core.sparsecheckout # timeout=10

 > git checkout -f dbf6906123ce969f2e12f014a19419a4f3b39b69 # timeout=10

Commit message: "update"

 > git rev-list --no-walk dbf6906123ce969f2e12f014a19419a4f3b39b69 # timeout=10

[maven_test2] $ /bin/sh -xe /tmp/jenkins2058903182559249478.sh

+ java -version

Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

java version "1.8.0_121"

Java(TM) SE Runtime Environment (build 1.8.0_121-b13)

Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

+ ant -version

Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

Apache Ant(TM) version 1.10.8 compiled on May 10 2020

+ mvn test

Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

[INFO] Scanning for projects...

[INFO] 

[INFO] -----------------------< org.example:maven_demo >-----------------------

[INFO] Building maven_demo 1.0-SNAPSHOT

[INFO] --------------------------------[ jar ]---------------------------------

[INFO] 

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ maven_demo ---

[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!

[INFO] Copying 2 resources

[INFO] 

[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ maven_demo ---

[INFO] Nothing to compile - all classes are up to date

[INFO] 

[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ maven_demo ---

[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!

[INFO] skip non existing resourceDirectory /var/lib/jenkins/workspace/maven_test2/src/test/resources

[INFO] 

[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ maven_demo ---

[INFO] Nothing to compile - all classes are up to date

[INFO] 

[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ maven_demo ---

[INFO] Surefire report directory: /var/lib/jenkins/workspace/maven_test2/target/surefire-reports

-------------------------------------------------------

 T E S T S

-------------------------------------------------------

Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

Running com.example.boyi.TestMaximun

Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.013 sec

Running com.example.boyi.HelloWorldTest

Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.001 sec

Results :

Tests run: 5, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESS

[INFO] ------------------------------------------------------------------------

[INFO] Total time:  1.259 s

[INFO] Finished at: 2020-11-03T17:51:47+08:00

[INFO] ------------------------------------------------------------------------

+ ant rebuild -buildfile /var/lib/jenkins/workspace/maven_test2/builds.xml

Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

Buildfile: /var/lib/jenkins/workspace/maven_test2/builds.xml

compile:

dump:

[jacoco:dump] Connecting to /[ip]-->hide

[jacoco:dump] Dumping execution data to /var/lib/jenkins/workspace/maven_test2/jacoco-integration.exec

rebuild:

BUILD SUCCESSFUL

Total time: 0 seconds

[JaCoCo plugin] Collecting JaCoCo coverage data...

[JaCoCo plugin] **/**.exec;**/classes;**/src/main/java; locations are configured

[JaCoCo plugin] Number of found exec files for pattern **/**.exec: 1

[JaCoCo plugin] Saving matched execfiles:  /var/lib/jenkins/workspace/maven_test2/jacoco-integration.exec

[JaCoCo plugin] Saving matched class directories for class-pattern: **/classes: 

[JaCoCo plugin]  - /var/lib/jenkins/workspace/maven_test2/target/classes 2 files

[JaCoCo plugin] Saving matched source directories for source-pattern: **/src/main/java: 

[JaCoCo plugin] Source Inclusions: **/*.java,**/*.groovy,**/*.kt,**/*.kts

[JaCoCo plugin] Source Exclusions: 

[JaCoCo plugin] - /var/lib/jenkins/workspace/maven_test2/src/main/java 2 files

[JaCoCo plugin] Loading inclusions files..

[JaCoCo plugin] inclusions: []

[JaCoCo plugin] exclusions: []

[JaCoCo plugin] Thresholds: JacocoHealthReportThresholds [minClass=0, maxClass=0, minMethod=0, maxMethod=0, minLine=0, maxLine=0, minBranch=0, maxBranch=0, minInstruction=0, maxInstruction=0, minComplexity=0, maxComplexity=0]

[JaCoCo plugin] Publishing the results..

[JaCoCo plugin] Loading packages..

[JaCoCo plugin] Done.

[JaCoCo plugin] Overall coverage: class: 0, method: 0, line: 0, branch: 0, instruction: 0, complexity: 0

Finished: SUCCESS