Aggregating coverage results doesn't work if the project has just one scoverage.xml file

[mthmulders]

Not sure whether this is a bug or a feature... But I feel like it's a bug.

I have a SBT-project in the being, which currently has just one submodule. But it will have more the in the future, so that's why I figured multi-project setup would be appropriate.

Running sbt coverageAggregate gives the following output:

[info] Aggregating coverage from subprojects...
[info] Found 1 subproject report files [<project dir>/<submodule dir>/target/scala-2.11/scoverage-report/scoverage.xml]
[info] No subproject data to aggregate, skipping reports

It makes sense, since CoverageAggregator#aggregate explicitly checks to see if more than one file has been found.

I'd expect that aggregation of results also works if exactly one file would've been found.

If this is indeed a bug, let me know, I think I can contribute a simple PR for this 😃.

[pasviegas]

So, I ran into this, and it seems to be a bug to me. I had 2 sub projects, but just one with a actual test suite, and I couldnt send my reports to coverall because coverall only gets the reports from the base project, so I had to create a fake test in my sub project just make this work.

[zzztimbo]

This is a bug.

[parkan]

Seeing this too, error seems to be here: https://github.com/scoverage/scalac-scoverage-plugin/blob/master/scalac-scoverage-plugin/src/main/scala/scoverage/report/CoverageAggregator.scala#L16