Setup Jest

babel.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+    presets: [
+        ["@babel/preset-env", { targets: { node: "current" } }],
+        "@babel/preset-typescript",
+    ]
+};

jest.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+    clearMocks: true,
+    moduleFileExtensions: ["js", "ts"],
+    testMatch: ["**/*.test.ts"],
+    transform: { ".(t|j)s$": "babel-jest" },
+    verbose: true
+};

package.json

@@ -6,6 +6,8 @@
   "scripts": {
     "build": "ncc build --source-map --license license.txt",
     "test:lint": "eslint src/** && eslint test/**",
+    "test:unit": "jest",
+    "test": "npm run test:lint && npm run test:unit"
   },
   "repository": {
     "type": "git",
@@ -25,11 +27,15 @@
   },
   "homepage": "https://github.com/Kir-Antipov/mc-publish#readme",
   "devDependencies": {
+    "@babel/preset-env": "^7.15.6",
+    "@babel/preset-typescript": "^7.15.0",
     "@types/node": "^16.10.1",
     "@typescript-eslint/eslint-plugin": "^4.31.2",
     "@typescript-eslint/parser": "^4.31.2",
     "@vercel/ncc": "^0.31.1",
+    "babel-jest": "^27.2.2",
     "eslint": "^7.32.0",
+    "jest": "^27.2.2",
     "typescript": "^4.4.3"
   },
   "dependencies": {}