Rerun failed tests in VSTest task using YAML - azure-devops

Question

I want to rerun failed tests in Azure Pipelines via YAML.
Project structure:
RerunTestsDemo.sln
+-- ClassLibrary1.csproj
+-- UnitTestProject1.csproj
+-- UnitTestProject2.csproj
azure-pipelines.yml:
trigger:
- automation/infra
pool: '$(AZURE_AGENT_POOL)'
steps:
- task: DotNetCoreCLI#2
inputs:
command: 'build'
projects: '**/MyUnitTestProject.csproj'
- task: VisualStudioTestPlatformInstaller#1
inputs:
packageFeedSelector: 'nugetOrg'
versionSelector: 'latestStable'
- task: VSTest#2
inputs:
testSelector: 'testAssemblies'
testAssemblyVer2: |
**\*test*.dll
!**\*TestAdapter.dll
!**\obj\**
searchFolder: '$(System.DefaultWorkingDirectory)'
publishRunAttachments: true
rerunFailedTests: true
rerunType: 'basedOnTestFailurePercentage'
rerunFailedThreshold: '30'
rerunMaxAttempts: '2'
env:
# All env vars correctly configured in pipeline
But it is not finding any test:

Answer 1

Please try the following to see if it can work.
steps:
- task: DotNetCoreCLI#2
displayName: 'dotnet build $(buildConfiguration)'
inputs:
projects: |
**/ClassLib1.csproj
**/ClassLib2.csproj
arguments: '--configuration $(buildConfiguration)'
- task: DotNetCoreCLI#2
displayName: 'dotnet test $(buildConfiguration)'
inputs:
command: test
projects: '**/MyUnitTestProject.csproj'
arguments: '--configuration $(buildConfiguration)'
[UPDATE]
Here is a sample as reference:
steps:
. . .
- task: VSBuild#1
displayName: 'Build solution **\*.sln'
inputs:
solution: '$(Parameters.solution)'
platform: '$(BuildPlatform)'
configuration: '$(BuildConfiguration)'
- task: VSTest#2
inputs:
testSelector: 'testAssemblies'
testAssemblyVer2: |
**\*test*.dll
!**\*TestAdapter.dll
!**\obj\**
searchFolder: '$(System.DefaultWorkingDirectory)'
publishRunAttachments: true
rerunFailedTests: true
rerunType: 'basedOnTestFailurePercentage'
rerunFailedThreshold: '30'
rerunMaxAttempts: '2'

Answer 2

I eventually figured it out. The test assembly task was not matching the project pattern.
This is the barebones working YAML:
trigger:
- master
pool:
vmImage: 'windows-latest'
variables:
solution: '**/*Tests*.sln'
steps:
- task: NuGetToolInstaller#1
- task: NuGetCommand#2
inputs:
restoreSolution: '$(solution)'
- task: VSBuild#1
inputs:
solution: '$(solution)'
- task: VisualStudioTestPlatformInstaller#1
inputs:
packageFeedSelector: 'nugetOrg'
versionSelector: 'latestStable'
- task: VSTest#2
inputs:
testSelector: 'testAssemblies'
testAssemblyVer2: |
**\UnitTest*.dll
!**\*TestAdapter.dll
!**\obj\**
searchFolder: '$(System.DefaultWorkingDirectory)'
testFiltercriteria: 'UnitTest1'
publishRunAttachments: True
rerunFailedTests: True
rerunType: 'basedOnTestFailureCount'
rerunFailedTestCasesMaxLimit: '5'
rerunMaxAttempts: '2'
Output: