Add basic tests (#70)

* integrate jest & write simple ts test file

* add test to workflow

.github/workflows/pr-checks.yml

@@ -35,8 +35,8 @@ jobs:
       - name: Run prettier
         run: pnpm lint
 
-  build:
-    name: Build check
+  test:
+    name: Test
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -49,7 +49,9 @@ jobs:
           cache: pnpm
       - name: Install dependencies
         run: pnpm install
-      - name: Run test build
+      - name: Run test
+        run: pnpm test
+      - name: Run build
         run: pnpm build
 
   dependency-review:

jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+};

package.json

@@ -8,6 +8,7 @@
   "scripts": {
     "start": "docusaurus start",
     "build": "docusaurus build",
+    "test": "jest",
     "swizzle": "docusaurus swizzle",
     "clear": "docusaurus clear",
     "serve": "docusaurus serve",
@@ -29,9 +30,12 @@
     "@docusaurus/theme-common": "^3.0.1",
     "@docusaurus/tsconfig": "^3.0.1",
     "@docusaurus/types": "^3.0.1",
+    "@jest/globals": "^29.7.0",
     "@types/node": "^20.8.10",
     "@types/react": "^18.2.36",
+    "jest": "^29.7.0",
     "prettier": "^3.0.3",
+    "ts-jest": "^29.1.1",
     "typescript": "5.2.2"
   },
   "engines": {