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Testing Integration

Comprehensive testing support for .NET projects with test discovery, execution, debugging, and AI-powered test generation.

Test Explorer

Overview​

C# Dev Tools provides complete testing integration:

  • Test Discovery - xUnit, NUnit, MSTest, SpecFlow support
  • Running Tests - All tests, specific projects, individual tests
  • Debugging Tests - Full debugging support with breakpoints
  • Test Filtering - Group and filter tests efficiently
  • Code Coverage - Interactive coverage dashboard with risk analysis
  • Test Generation - AI-powered test creation with GitHub Copilot
  • SpecFlow Support - BDD testing integration
  • Playwright Integration - End-to-end browser testing

Test Discovery​

Tests are automatically discovered from:

  • MSTest - Microsoft's testing framework
  • xUnit - Modern extensible framework
  • NUnit - Feature-rich testing framework
  • SpecFlow - BDD/Gherkin tests

Tests are organized hierarchically by:

  • Project
  • Namespace
  • Test class
  • Test method

Running Tests​

Running All Tests​

Click the "Run All Tests" button in the Test Explorer title bar, or use Ctrl+R, T.

Running Specific Test Projects​

Right-click on a test project in Solution Explorer and select "Run Tests".

Running Individual Tests​

  1. Hover over a test in Test Explorer
  2. Click the "Run Test" icon (play button)

Running Test Groups​

  1. Hover over a namespace or class
  2. Click the "Run Tests" icon
  3. All tests in that group execute

Debugging Tests​

To debug a test:

  1. Set breakpoints in your test code
  2. Hover over a test in Test Explorer
  3. Click the "Debug Test" icon (bug icon)
  4. The debugger stops at your breakpoints

Test Results​

After running tests:

  • ✓ Green check: Passed
  • ✗ Red X: Failed
  • ⚠ Yellow triangle: Skipped

Click on a failed test to see:

  • Error message
  • Stack trace
  • Expected vs actual values
  • Source line

Test Filtering and Grouping​

Filter tests by:

  • Name (using search box)
  • Status (passed/failed/skipped)
  • Project
  • Class

Group tests by:

  • Project
  • Namespace
  • Class
  • Status

Test Output​

View detailed test output:

  1. Run tests
  2. Open Output panel (Ctrl+Shift+U)
  3. Select ".NET Test Log" from dropdown
  4. View execution logs

Accessing Test Explorer​

  1. Click the Test Explorer icon (beaker) in Activity Bar
  2. Or use Command Palette: "Test: Focus on Test Explorer View"
  3. Or right-click a test project: "Run Tests"

Test Navigation​

Navigate to test source:

  1. Click any test in Test Explorer
  2. The source file opens at the test method
  3. For failed tests, click stack trace lines to navigate

Test Settings​

Configure test behavior:

  1. Open VS Code settings (Ctrl+,)
  2. Search for "testing"
  3. Adjust:
    • Auto-run on save
    • Test Explorer view
    • Discovery behavior

Integration with Solution Explorer​

Tests integrate seamlessly:

  • Right-click test projects to run tests
  • View test project dependencies
  • Manage test NuGet packages
  • Set test project configurations