Collecting code coverage prevents all test discovery on net472 only #578
Description
This repros locally and in Azure Pipelines builds.
git clone https://github.com/AArnott/Xunit.StaFact.git
cd Xunit.StaFact\src
git checkout 6d1a5e6023f612ad00d2e00f5204f362dc0a71ce
dotnet test --filter "TestCategory!=FailureExpected" -v n /p:CollectCoverage=true
Notice how net472 runs 0 tests and reports:
+---------------+------+--------+--------+
| Module | Line | Branch | Method |
+---------------+------+--------+--------+
| Xunit.StaFact | 0% | 0% | 0% |
+---------------+------+--------+--------+
+---------+------+--------+--------+
| | Line | Branch | Method |
+---------+------+--------+--------+
| Total | 0% | 0% | 0% |
+---------+------+--------+--------+
| Average | 0% | 0% | 0% |
+---------+------+--------+--------+
While the netcoreapp targets report non-zero results:
+---------------+--------+--------+--------+
| Module | Line | Branch | Method |
+---------------+--------+--------+--------+
| Xunit.StaFact | 86.44% | 62.19% | 78.33% |
+---------------+--------+--------+--------+
+---------+--------+--------+--------+
| | Line | Branch | Method |
+---------+--------+--------+--------+
| Total | 86.44% | 62.19% | 78.33% |
+---------+--------+--------+--------+
| Average | 86.44% | 62.19% | 78.33% |
+---------+--------+--------+--------+
In fact simply comparing the output of these two commands shows that the mere collection of code coverage is what blocks test discovery:
dotnet test --filter "TestCategory!=FailureExpected" /p:CollectCoverage=true -f net472
dotnet test --filter "TestCategory!=FailureExpected" -f net472