Access Azure App Configuration from unit test project ran from Azure DevOps pipeline

I am deploying a new project in Azure Pipeline, I have unit tests into this projects. unit tests must have access an azure app configuration, what is the best way for my project to authenticate to access azure app configuration ?

I don't know how to use the managed identity from there ...

Solution

I read a little bit more and it appear managed identity is only used for VM which I don't want.

To be able to authenticate to Azure AppConfiguration from my unit test ran by my pipeline, I have used Azurecli task which has the ServiceConnection context and I ran dotnet test command, then I export my test results and my code coverage so that Azure DevOps has everything it needs

  - task: AzureCLI@1
    inputs:
      azureSubscription: 'devops-serviceconnection-dev'
      scriptLocation: 'inlineScript'
      inlineScript: |
        cd .\SharepointFileTransfer.Test\
        dotnet add package coverlet.collector
        dotnet test --logger "trx;LogFileName=TestResults.trx" --results-directory $(Build.ArtifactStagingDirectory)/TestResults --collect:"XPlat Code Coverage"

  - task: PublishCodeCoverageResults@2
    inputs:
      summaryFileLocation: '$(Build.ArtifactStagingDirectory)/**/*coverage.cobertura.xml'
      failIfCoverageEmpty: false

  - task: PublishTestResults@2
    inputs:
      testResultsFormat: 'VSTest'
      testResultsFiles: '$(Build.ArtifactStagingDirectory)/TestResults/*.trx'
      mergeTestResults: true
      failTaskOnFailedTests: true

and then I used AzureCliCredential for my unit test to access to Azure AppConfiguration

var builder = new ConfigurationBuilder();
builder.AddAzureAppConfiguration(options =>
{
    var visualStudioCredential = new VisualStudioCredential(new VisualStudioCredentialOptions() { TenantId = TenantId });
    var tokenCredential = new ChainedTokenCredential(visualStudioCredential, new AzureCliCredential(), new ManagedIdentityCredential());
    options.Connect(new Uri(AppConfigurationEndpoint), tokenCredential)
        .Select("SharepointFileTransfer:*", "dev");
});
Configuration = builder.Build();