SetOut.SetOutReadToEnd (System.Console.Tests) failing

[ViktorHofer]

Configuration: net6.0-Linux-Release-x64-CoreCLR_release-Ubuntu.1604.Amd64.Open

  Discovering: System.Console.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Console.Tests (found 103 of 137 test cases)
  Starting:    System.Console.Tests (parallel test collections = on, max threads = 2)
    Color.RedirectedOutput_EnvVarSet_EmitsAnsiCodes [SKIP]
    SetOut.SetOutReadToEnd [FAIL]
      Assert.Equal() Failure
                    ↓ (pos 4)
      Expected: Test
      Actual:   Test      Condition(s) not met: "TermIsSet"\n
                    ↑ (pos 4)
      Stack Trace:
        /_/src/libraries/System.Console/tests/Helpers.cs(30,0): at Helpers.SetAndReadHelper(Action`1 setHelper, Func`1 getHelper, Func`2 readHelper)
        /_/src/libraries/System.Console/tests/SetOut.cs(33,0): at SetOut.SetOutReadToEnd()
0
0
  Finished:    System.Console.Tests
=== TEST EXECUTION SUMMARY ===
   System.Console.Tests  Total: 145, Errors: 0, Failed: 1, Skipped: 1, Time: 25.986s

Console: https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-81cebc580e4d469d8c/System.Console.Tests/1/console.d7bb424a.log?sv=2019-07-07&se=2021-09-10T12%3A52%3A27Z&sr=c&sp=rl&sig=ImEkdaCe1Eq5kdIjsjMqsca516L08YmwxWWuOg%2FEwRs%3D

Build: https://dev.azure.com/dnceng/public/_build/results?buildId=1309902&view=ms.vss-test-web.build-test-results-tab&runId=38562426&paneView=debug

Runfo Tracking Issue: setout.setoutreadtoend

Build	Definition	Kind	Run Name	Console	Core Dump	Test Results	Run Client
1472741	runtime	Rolling	net6.0-Linux-Release-x64-Mono_release-(Centos.8.Amd64.Open)Ubuntu.1604.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-8-helix-20201229003624-c1bf759	console.log			runclient.py

Build Result Summary

Day Hit Count	Week Hit Count	Month Hit Count
0	0	1

[ghost]

Tagging subscribers to this area: @dotnet/area-system-console
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Configuration: net6.0-Linux-Release-x64-CoreCLR_release-Ubuntu.1604.Amd64.Open

  Discovering: System.Console.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Console.Tests (found 103 of 137 test cases)
  Starting:    System.Console.Tests (parallel test collections = on, max threads = 2)
    Color.RedirectedOutput_EnvVarSet_EmitsAnsiCodes [SKIP]
    SetOut.SetOutReadToEnd [FAIL]
      Assert.Equal() Failure
                    ↓ (pos 4)
      Expected: Test
      Actual:   Test      Condition(s) not met: "TermIsSet"\n
                    ↑ (pos 4)
      Stack Trace:
        /_/src/libraries/System.Console/tests/Helpers.cs(30,0): at Helpers.SetAndReadHelper(Action`1 setHelper, Func`1 getHelper, Func`2 readHelper)
        /_/src/libraries/System.Console/tests/SetOut.cs(33,0): at SetOut.SetOutReadToEnd()
0
0
  Finished:    System.Console.Tests
=== TEST EXECUTION SUMMARY ===
   System.Console.Tests  Total: 145, Errors: 0, Failed: 1, Skipped: 1, Time: 25.986s

Console: https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-81cebc580e4d469d8c/System.Console.Tests/1/console.d7bb424a.log?sv=2019-07-07&se=2021-09-10T12%3A52%3A27Z&sr=c&sp=rl&sig=ImEkdaCe1Eq5kdIjsjMqsca516L08YmwxWWuOg%2FEwRs%3D

Build: https://dev.azure.com/dnceng/public/_build/results?buildId=1309902&view=ms.vss-test-web.build-test-results-tab&runId=38562426&paneView=debug

Author:	ViktorHofer
Assignees:	-
Labels:	area-System.Console, untriaged
Milestone:	-

[carlossanlop]

The TERM env variable cannot be found, or is empty:

runtime/src/libraries/System.Console/tests/Color.cs

Line 75 in 0d848f6

public static bool TermIsSet => !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TERM"));

[am11]

Actual: Test Condition(s) not met: "TermIsSet"\n

When tests run in parallel, reading from Console.Out mangles the ReadToEnd output and therefore, SetOut tests intermittently fail. Condition(s) not met part is the output of previous skipped test. We can disable parallelism by adding [Collection(nameof(DisableParallelization))] on this class once PR #62132 is completed and delete ActiveIssue.