[GRADLE-3001] applying jacoco plugin may lead to test failures Created: 22/Jan/14  Updated: 10/Feb/17  Resolved: 10/Feb/17

Status: Resolved
Project: Gradle
Affects Version/s: 1.10
Fix Version/s: None

Type: Bug
Reporter: Szczepan Faber Assignee: Unassigned
Resolution: Won't Fix Votes: 0


Jacoco plugin adds agent settings to test task vm regardless if we're running jacoco reports. This means that when the plugin is applied, by default all "test" tasks will be execute tests in a vm with the agent. I found that it has some awkward effect on certain tests. Basically, some tests started failing (could be a jacoco bug):

java.lang.IllegalArgumentException: Failed to instantiate override type: class xxx.R2ClientFactory$Overrides. Errors: [Found private field reachable from override class: class xxx.R2ClientFactory$Overrides.$jacocoData, Found static field reachable from override class: class xxx.R2ClientFactory$Overrides.$jacocoData]

It feels that to be a good citizen, jacoco plugin should not alter the behavior of tests, when we are not tracking coverage. It feels that the most natural approach is: when we run jacoco reports the tests are executed with the agent; when we just run tests, the jacoco agent is not involved. Obviously, the user can configure the agent to be involved in every test execution. However, I don't think it should be the default.

Comment by Benjamin Muschko [ 15/Nov/16 ]

As announced on the Gradle blog we are planning to completely migrate issues from JIRA to GitHub.

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We look forward to collaborating with you more closely on GitHub. Thank you for your contribution to Gradle!

Comment by Benjamin Muschko [ 10/Feb/17 ]

Thanks again for reporting this issue. We haven't heard back from you after our inquiry from November 15th. We are closing this issue now. Please create an issue on GitHub if you still feel passionate about getting it resolved.

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