Writing tests

Unit and integration tests use Vitest. Tests run from workspace directories, not the repo root.

Test file locations

Unit tests - alongside source files:

packages/editor/src/lib/primitives/Vec.ts
packages/editor/src/lib/primitives/Vec.test.ts  # Same directory

Integration tests - in src/test/ directory:

packages/tldraw/src/test/SelectTool.test.ts
packages/tldraw/src/test/commands/createShape.test.ts