Testing with TS4

TS4 is the Netsnek e.U. TypeScript testing framework. Run unit tests, snapshots, coverage reports, and mutation tests from a single CLI.

Test Types

• Unit — Isolated function and module tests
• Snapshot — Output comparison for UI and serialization
• Coverage — Line, branch, and function metrics
• Mutation — Fault injection to verify test quality

CLI Reference

Walkthrough

# Run all tests
./scripts/test-runner.sh --run

# Generate coverage
./scripts/test-runner.sh --coverage

# Check status
./scripts/test-runner.sh --status