This project is an example of generating detailed line coverage report with the JACOCO library.

The detailed line coverage report is the test execution coverage with detailed information about specific executed lines (lines hit information during test execution), which is a richer information than the general percentage coverage of classes/methods/lines.

The detailed report example

• Maven3.5
• JDK 1.8

Install JDK1.8 and Maven on Ubuntu

There are three steps to generate the detailed coverage report:

• Configure the project with maven (create/config the 'pom.xml' as this example)

• Test the project with Jacoco agent (run the test with Java VM argument -javaagent:path/to/jacocoagent.jar)

  mvn -Dtest=lab.RectangleTest#rotate test
  

• Generate the coverage report with Jacoco ant

  mvn antrun:run@generate-report -Dskip.int.tests.report=false
  

The generated report is under dirtarget/coverage-report/html/jacoco-multi

Note that, you can generate the detailed test execution coverage report for each test by running the test and generating report (step 2 and 3) repeatedly with following command.

mvn -Dtest=lab.RectangleTest#rotate test

PS: the source code under src and test is just a small demo for test execution

JACOCO https://github.com/pszeliga/jacoco-e2e-coverage/blob/master/pom.xml