Test coverage average coming as infinity

[arpymastro]

We use coverlet with all our .NET Core projects(APIs, Libraries) and it works just fine for us.

Recently we have created one .NET Standard library and I have added .NET Core 2.2 xUnit test project in it with 2 tests. We have added coverlet.msbuild 2.5.1 nuget package to calculate the code coverage -

dotnet test -c Release --logger TRX /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:CoverletOutput=TestResults

It runs the tests, all tests are passing but the code coverage is showing as empty with average "infinity". It is not even identifying module name. Please refer attached notepad file for sample output.

What's going wrong here?
Sample output.txt

[MarcoRossignoli]

Can you try with last version https://www.nuget.org/packages/coverlet.msbuild/ 2.6.3?

[MarcoRossignoli]

@arpymastro any news?

[Blaatschaap]

@MarcoRossignoli I have the same issue, using 2.6.3.

I also have the issue that my coverage xml's are basically empty. the trx file is filled with the correct data

Jenkins console output:"

• dotnet test /var/jenkins_home/workspace/Build/XUnitTestProject1.csproj /p:CollectCoverage=true /p:CoverletOutput=/var/jenkins_home/workspace/Build/TestResults/ /p:CoverletOutputFormat=cobertura --logger trx;LogFileName=UnitTests.trx --collect:XPlat Code Coverage
  Test run for /var/jenkins_home/workspace/Build/bin/Debug/netcoreapp2.2/XUnitTestProject1.dll(.NETCoreApp,Version=v2.2)
  Microsoft (R) Test Execution Command Line Tool Version 16.2.0-preview-20190606-02
  Copyright (c) Microsoft Corporation. All rights reserved.

Starting test execution, please wait...
WARNING: Overwriting results file: /var/jenkins_home/workspace/Build/TestResults/UnitTests.trx
Results File: /var/jenkins_home/workspace/Build/TestResults/UnitTests.trx

Attachments:
/var/jenkins_home/workspace/Build/TestResults/63d42b4b-4a28-4e66-907c-4db2016e7346/coverage.cobertura.xml

Test Run Successful.
Total tests: 4
Passed: 4
Total time: 4.1592 Seconds

Calculating coverage result...
Generating report '/var/jenkins_home/workspace/Build/TestResults/coverage.cobertura.xml'

+--------+------+--------+--------+
| Module | Line | Branch | Method |
+--------+------+--------+--------+

+---------+------+--------+--------+
| | Line | Branch | Method |
+---------+------+--------+--------+
| Total | 100% | 100% | 100% |
+---------+------+--------+--------+
| Average | INF% | INF% | INF% |
+---------+------+--------+--------+

coverage.cobertura.xml:

[MarcoRossignoli]

@Blaatschaap do you get same result if you run in local or is related only to ci?

[Blaatschaap]

@MarcoRossignoli I get the same result running locally

[MarcoRossignoli]

can you attach you command?

[Blaatschaap]

dotnet test /var/jenkins_home/workspace/Build/XUnitTestProject1.csproj /p:CollectCoverage=true /p:CoverletOutput=/var/jenkins_home/workspace/Build/TestResults/ /p:CoverletOutputFormat=cobertura --logger trx;LogFileName=UnitTests.trx --collect:XPlat Code Coverage

[MarcoRossignoli]

@MarcoRossignoli I have the same issue, using 2.6.3.

Sorry but your command are using collector and above you said 2.6.3 msbuild version...are you using msbuild or collector?

[Blaatschaap]

I have both in the project (collection version 1.0.1)

[MarcoRossignoli]

mmm not sure if could lead to overlapped issue can you try with only collector like https://github.com/tonerdo/coverlet/blob/master/Documentation/VSTestIntegration.md#coverlet-integration-with-vstest
I mean there is a possibility that you're instrumenting dll more than once, throught msbuild and collector at same time.
Remember to cleanup build with git clean -fdx before.

[Blaatschaap]

• dotnet publish
  Microsoft (R) Build Engine version 16.2.32702+c4012a063 for .NET Core
  Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 64.06 ms for /var/jenkins_home/workspace/Build/XUnitTestProject1.csproj.
  XUnitTestProject1 -> /var/jenkins_home/workspace/Build/bin/Debug/netcoreapp2.2/XUnitTestProject1.dll
  XUnitTestProject1 -> /var/jenkins_home/workspace/Build/bin/Debug/netcoreapp2.2/publish/
  [Pipeline] sh

• dotnet vstest /var/jenkins_home/workspace/Build/bin/Debug/netcoreapp2.2/XUnitTestProject1.dll --collect:XPlat Code Coverage
  Microsoft (R) Test Execution Command Line Tool Version 16.2.0-preview-20190606-02
  Copyright (c) Microsoft Corporation. All rights reserved.

Starting test execution, please wait...

Attachments:
/var/jenkins_home/workspace/Build/TestResults/5b3f23bb-07de-4a1a-8468-f1ef96fa923b/coverage.cobertura.xml

Test Run Successful.
Total tests: 4
Passed: 4
Total time: 4.3694 Seconds

[MarcoRossignoli]

Collector doesn't print anything in console...is it the file empty?