DotCover in TeamCity 8 doesn't work

Question

I try to run dotCover with my NUnit tests, in the TeamCity 8 as a build step. But no metter what I try I always get the same error in the log file:

Step 4/4: Coverage (NUnit) (1s)
[Step 4/4] Starting: C:\TeamCity\buildAgent\plugins\dotnetPlugin\bin\JetBrains.BuildServer.NUnitLauncher.exe #TeamCityImplicit
[Step 4/4] in directory: C:\TeamCity\buildAgent\work\6aee0f0d2626793d
[Step 4/4] ##teamcity[importData type='dotNetCoverage' tool='dotcover' file='C:\TeamCity\buildAgent\temp\buildTmp\coverage_dotcover3226256377023598081.data']
[Step 4/4] Importing data from 'C:\TeamCity\buildAgent\temp\buildTmp\coverage_dotcover3226256377023598081.data' with 'dotNetCoverage' processor
[Step 4/4] Rejected coverage report file: C:\TeamCity\buildAgent\temp\buildTmp\coverage_dotcover3226256377023598081.data size: 0. File is empty or does not exist
[Step 4/4] Process exited with code -2146232576
[Step 4/4] Step Coverage (NUnit) failed

I have tried to use both the included in TeamCity dotCover and the separately installed one, but both are failing with the same error.

My configuration:

If I choose no coverage tool, the tests work fine on its own. But with dotCover selected I always get the same error.

Any help here would be much appreciated.

Answer 1

Check out: http://confluence.jetbrains.com/pages/viewpage.action?pageId=49448495

In the case of internal TeamCity DotCover, you have to add the "ALL APPLICATION PACKAGES" read access rights to the TeamCity installation folder. If using an external DotCover, add the rights there.

This corrected the issue for me, for now.

Answer 2

It's probably because you are running this on build agent without .NET 3.5 (but with 4.0). It's easy to check because you will get exception just after running dotCover.exe on this agent. Install .NET 3.5 (using Server Manager in case of newest Windows).

The next thing is that there is another bug with dotCover in TeamCity 8. You need to use trial dotCover installation until they fix it (and put the path to installed dotCover into the build step configuration).

It solved the problem in my case.

Answer 3

Interestingly, for me at least, it worked for me once I disabled code coverage (i.e. un-selected an item in the .NET Coverage tool drop-down) and ran the build. When I re-enabled code coverage it worked (with no other changes to anything in TeamCity or on the build server). Weird!

I'm currently running TeamCity version 8.0.4 (build 27616).