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Copilot AI commented Oct 8, 2025

Summary

This PR adds a comprehensive test suite for the ActionTimerExecutor project using XUnit and NSubstitute, providing full coverage of the ActionTimer class functionality.

Changes

  • New Test Project: Created ActionTimerExecutor.Tests targeting .NET 9.0
  • Dependencies Added:
    • XUnit 2.9.2 (test framework)
    • NSubstitute 5.3.0 (mocking framework)
    • xunit.runner.visualstudio and Microsoft.NET.Test.Sdk for test execution
  • Updated Solution: Added the test project to ActionTimerExecutor.sln

Test Coverage

The test suite includes 21 comprehensive tests covering all public methods and scenarios:

Core Functionality

  • AddAction: Tests for both ordered (noWait=false) and concurrent (noWait=true) execution modes, including duplicate key handling
  • RemoveAction: Validates removal from both ordered and concurrent action lists, with proper handling of non-existent actions
  • GetErrors: Ensures error retrieval works correctly and that error history is cleared after exceeding 100 entries

Timer Execution

  • Validates that actions execute when their intervals have elapsed
  • Confirms actions don't execute prematurely (before interval expires)
  • Tests multiple actions executing in both ordered and concurrent modes

Exception Handling

  • Verifies exceptions in actions are caught and logged properly
  • Ensures the timer continues running after action failures
  • Validates error messages are stored correctly in the error list

Resource Management

  • Tests Dispose() method to ensure proper cleanup without exceptions

Testing Approach

All tests use NSubstitute to mock the ILogger<ActionTimer> dependency, ensuring tests are isolated and don't require external logging infrastructure. The tests use realistic timing scenarios with appropriate delays to verify the periodic timer behavior while keeping test execution time reasonable.

Test Results

✅ All 21 tests passing
✅ Build successful
✅ No security vulnerabilities detected

The test suite provides a solid foundation for maintaining code quality and catching regressions as the project evolves.

Original prompt

Create a suite of tests using XUnit and NSubstitute for the project.


💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Copilot AI changed the title [WIP] Add test suite using xUnit and NSubstitute Add comprehensive XUnit test suite with NSubstitute for ActionTimerExecutor Oct 8, 2025
Copilot AI requested a review from eeaquino October 8, 2025 23:41
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