# Naive engine: TypeScript

The throwaway engine for [Module 0, The Rewrite Trap](../../course/00-rewrite-trap/lesson.md). It is written the obvious way on purpose: minions are shared object references, damage applies at once, triggers fire inline, and a Deathrattle runs the instant a minion's Health reaches 0. Cards are defined inside the engine (`makeMinion` and `cast` in `src/engine.ts`).

Run the tests from this directory:

```
npm install
npx vitest run
```

You should see two passing tests:

- `test_00_naive_runs` passes normally.
- `test_00_real_rules_whirlwind_order` is expected to fail. It states the real game's event order, which this engine cannot produce, so it is marked `test.fails`. To see the order the engine actually produces, change `test.fails(` to `test(` and run the tests again.

`npm run typecheck` runs the TypeScript compiler.

Do not use this package in Module 1. Your real engine starts from `workspace-template/ts/`.