Rerun fail test case - MsTest

AnnyD 1

Hi Team

I need to rerun the fail test case automatically using mstest in my automation project (selenium /C#)

I have few solutions as below but i am not finding the exact one . If any one has already worked ,pls help me out on this.

sol1 :

using TrxExtractFAiledTests.Exe , i will list out the failed test case by passing the dll through this exe and execute it .

But here the issue is , the final report will contain only these rerun test case results as the latest report . But i need the report should contain all the test case results.

Sol2 :

I found the below link but the code is not available and this looks complex !
https://www.codeproject.com/Articles/883305/MSTest-Rerun-Failed-Tests-Through-MSTest-exe-Wrapp

Sol 3 :

https://social.msdn.microsoft.com/Forums/en-US/65f00a6e-b118-408a-92e3-abfd384673f5/rerun-failed-tests-again-on-mstest?forum=vsunittest

Tianyu Sun-MSFT 27,271 Reputation points Microsoft Vendor

2022-04-05T04:32:55.597+00:00

Hi @AnnyD , welcome to Microsoft Q&A forum. I haven’t tested the solution 2, but solution 3 looks like more related to run unit tests in parallel. I think maybe you can consider using solution 1 with some modifications, for example combining the test results by using log4net.

1 answer

AnnyD 1 Reputation point

2022-04-28T11:12:45.93+00:00

@Tianyu Sun-MSFT Thank you . But solution 1 ,the issue is the latest report will have just the fail test cases which rerun .
How log4net will help here ? Can you pls elaborate little more
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Tianyu Sun-MSFT 27,271 Reputation points Microsoft Vendor

2022-05-05T10:02:50.093+00:00

Hi @AnnyD , I double checked, and I think using log4net will also not work, as the TrxExtractFAiledTests.Exe only runs failed test case, the passed test case will not run again and the log4net has no chance to record the test results which were passed. And I’m afraid, I don’t find any alternative(tools) that can combine the passed test results and failed test results.

Ricardo Pereira 0 Reputation points

2023-09-21T13:00:10.5833333+00:00

Hi @AnnyD ,

I was having a similar use case to what are you referring to and because of that I've been working in two tools to achieve that outcome.

This one https://www.nuget.org/packages/dotnet-test-rerun/ does the rerun of failed tests but, like you said I ended up with several trx files with the same test being failed and passed.

So, because of that, I've started working on another tool to merge in a single file keeping the passed ones: https://www.nuget.org/packages/dotnet-trx-merge/

This second tool first version has just been released and will keep being improved. In my case a simplified version of a trx file was enough but, if you see a more complex version is required, please provide feedback on the repo.

Hope it helps.
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