Clarify how to capture logs from tests in .NET Aspire documentation

[Copilot]

This PR addresses the missing information about capturing logs from .NET Aspire tests by adding comprehensive documentation and code examples.

Changes Made

Enhanced Documentation

• Added a new "Capture logs from tests" section to docs/testing/write-your-first-test.md
• Explained how to use the AddLogging method on the service collection
• Documented the need for explicit log filter configuration since appsettings.json isn't replicated in test projects
• Provided recommendations for popular logging packages for each testing framework

Code Examples

• Created complete LoggingTest.cs examples for xUnit, NUnit, and MSTest frameworks
• Added proper package references for Microsoft.Extensions.Logging.Console
• Updated the existing xUnit IntegrationTest1.cs comment to reference the new logging guidance
• All code snippets build successfully and demonstrate proper logging configuration

Key Technical Details Covered

• How to configure logging providers using builder.Services.AddLogging()
• Setting appropriate log filters to reduce noise from infrastructure components:

  builder.Services.AddLogging(logging => logging
      .AddConsole()
      .AddFilter("Default", LogLevel.Information)
      .AddFilter("Microsoft.AspNetCore", LogLevel.Warning)
      .AddFilter("Aspire.Hosting.Dcp", LogLevel.Warning));

• Framework-specific logging provider package recommendations

The solution provides clear, actionable guidance that makes it much easier for developers to capture and view logs during .NET Aspire test execution, addressing the confusion mentioned in the original issue.

Fixes #2096.

Warning

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I tried to connect to the following addresses, but was blocked by firewall rules:

• aka.ms
  • Triggering command: curl -I -sSL --retry 5 --retry-delay 2 --connect-timeout 15 REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

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Internal previews

📄 File	🔗 Preview link
docs/testing/write-your-first-test.md	Write your first .NET Aspire test

[learn-build-service-prod]

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.