add tests

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+
+name: CI
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - run: npm ci
+      - run: npm run lint
+      - run: npm test
+      - run: npm run build

.gitignore

@@ -1,4 +1,5 @@
 
 node_modules/
 dist/
+coverage/
 .DS_Store

.npmignore

@@ -1,4 +1,6 @@
 /node_modules
 /src
+/tests
+/coverage
 tsconfig.json
 eslint.config.js

.replit

@@ -0,0 +1,8 @@
+modules = ["nodejs-20"]
+run = "npm run watch"
+
+[nix]
+channel = "stable-24_05"
+
+[deployment]
+run = ["sh", "-c", "npm run watch"]

jest.config.js

@@ -0,0 +1,10 @@
+
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  testMatch: ['**/tests/**/*.test.ts'],
+};