Testing Integration

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

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