Hi,
Mockito.spy() modifies the class under test. So JaCoCo sees a different class
at runtime than when creating the report. This is not supported by JaCoCo. See
FAQ <https://www.jacoco.org/jacoco/trunk/doc/faq.html>:
> Why does a class show as not covered although it has been executed?
>
> First make sure execution data has been collected. For this select the
> Sessions link on the top right corner of the HTML report and check whether
> the class in question is listed. If it is listed but not linked the class at
> execution time is a different class file. Make sure you're using the exact
> same class file at runtime as for report generation. Note that some tools
> (e.g. EJB containers, mocking frameworks) might modify your class files at
> runtime. Please see the chapter about class ids
> <https://www.jacoco.org/jacoco/trunk/doc/classids.html> for a detailed
> discussion.
>
Best regards,
-marc
> On 10. May 2022, at 23:33, Shashank Chaudhry <schaud...@spotnana.com> wrote:
>
> My company is using the jacoco-maven-plugin 0.8.5 and I seem to be observing
> some odd behavior. I'll briefly try to explain what we're doing, but please
> feel free to ask me more questions.
>
> There is an abstract class (BaseClient) I want to test, which has some
> non-abstract functions.
>
> abstract class BaseClient {
> protected void someFn() {
> log.error("This ran");
> .....stuff.....
> }
> }
>
> To test it, we extend it (TestClient).
>
> class TestClient extends BaseClient {
> @Override
> public void someFn() {
> return super.someFn();
> }
> }
>
> The TestClient is created in test files with Mockito.spy().
>
> When I run the tests, I see that the BaseClient function actually ran,
> because logs that I added get printed. I also see that using the inbuilt
> IntelliJ coverage tool, I get coverage for the function in the abstract
> class. But I Jacoco, the entire BaseClient has 0% coverage.
>
> Thanks,
> Shashank
>
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