Execute code coverage for single test / test suite

[tha022]

I have a Test Suite where I define all the tests I want to run.
This so I can start up a webserver on "@BeforeClass" and shut down at "@afterclass" so the server is running throughout execution of the whole test suite. That makes the test execution much quicker.

This is how I execute it:

$ activator "test-only suite.DigSuite"
or
$ sbt "test-only suite.DigSuite"

But if I run:

$ sbt jacoco:cover

It implicity executes

$ sbt test

I tried:

$ sbt "jacoco:test-only suite.DigSuite"
and
$ sbt "jacoco:testOnly suite.DigSuite"

But no luck, it still executes the "sbt test". Anyone who can point me in right direction?

In advance thanks

[raam86]

Yes I am having the same issue, I do not want jacoco to run the tests only report on coverage.

[MSaifAsif]

Did anyone have any luck on how to achieve this so far?

[karthikkbaalaji]

+1

[maichler]

Since version 3.x sbt-jacoco seems to instrument code not only for task jacoco but also for test and testOnly. This allows to combine e.g. testOnly and jacocoReport to generate a coverage report.

$> clean
$> testOnly suite.DigSuite
$> jacocoReport

clean is necessary because coverage data gets merged instead of replaced. It would be enough to just delete target/jacoco/data/jacoco.exec before executing testOnly but there is no easy way from within the sbt console that I'm aware of.

That said, a jacocoOnly task would be much more convenient.

[gmkumar2005]

Not working. I have done ;clean;testOnly **.MyFavouriteDaoTest;jacocoReport

The report shows 0% coverage. I have noticed After completion of testOnly

target/jacoco/data/jacoco.exec is not created.

When i run all test cases the results are proper.
Any one got this working ?

Details :
Plugin used : addSbtPlugin("com.github.sbt" % "sbt-jacoco" % "3.0.3")
Scala Version : scala-2.12
Junit : Version 4.1.2
Source Code : Java
sbt.version=1.0.2

[maichler]

I've rechecked my project settings and noticed that I missed a detail:

fork in Test := true

With fork enabled, jacoco is able to load its agent via commandline arguments.

[gmkumar2005]

Issue is resolved after I added fork in Test := true

[pradeepreddyk]

fork in Test :=true would run all the tests in sequence. Is there any option to keep the parallel execution true.

[davidgfolch]

Same as @gmkumar2005 here