From e7b5027428fee9d0e95112cbe42794133b6657cf Mon Sep 17 00:00:00 2001
From: adil <68734155+adevinwild@users.noreply.github.com>
Date: Tue, 14 Feb 2023 08:44:27 +0100
Subject: [PATCH] feat: :sparkles: Added `jest` with TypeScript support

- Added a unit test for the helloWorld function
---
 jest.config.cjs          | 5 +++++
 package.json             | 6 +++++-
 tests/helloWorld.test.ts | 7 +++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 jest.config.cjs
 create mode 100644 tests/helloWorld.test.ts

diff --git a/jest.config.cjs b/jest.config.cjs
new file mode 100644
index 0000000..869f8ad
--- /dev/null
+++ b/jest.config.cjs
@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+}
diff --git a/package.json b/package.json
index d20ecfb..9a8b951 100644
--- a/package.json
+++ b/package.json
@@ -21,15 +21,19 @@
     "build": "npm run clean && microbundle",
     "dev": "microbundle watch",
     "lint": "eslint ./src --ext .ts",
-    "clean": "rimraf dist"
+    "clean": "rimraf dist",
+    "test": "jest ./tests"
   },
   "devDependencies": {
+    "@types/jest": "^29.4.0",
     "@typescript-eslint/eslint-plugin": "^5.52.0",
     "@typescript-eslint/parser": "^5.52.0",
     "eslint": "^8.34.0",
+    "jest": "^29.4.2",
     "microbundle": "^0.15.1",
     "prettier": "^2.8.4",
     "rimraf": "^3.0.2",
+    "ts-jest": "^29.0.5",
     "ts-node": "^10.9.1",
     "typescript": "^4.9.5"
   }
diff --git a/tests/helloWorld.test.ts b/tests/helloWorld.test.ts
new file mode 100644
index 0000000..aaedb60
--- /dev/null
+++ b/tests/helloWorld.test.ts
@@ -0,0 +1,7 @@
+import { helloWorld } from '../src'
+
+describe('helloWorld', () => {
+    it('returns "Hello World!"', () => {
+        expect(helloWorld()).toBe('Hello World!')
+    })
+})