test: use Vitest instead of Jest (#492)

package.json

@@ -4,10 +4,9 @@
   "description": "Browser detection using the user agent, returns the name and version of the browser",
   "main": "dist/browser-detection.js",
   "scripts": {
-    "prepare": "npm start",
     "start": "webpack --config webpack.config.js",
-    "lint": "eslint src/**/*.js",
-    "test": "jest --coverage"
+    "lint": "eslint src/**/*.ts",
+    "test": "vitest --coverage"
   },
   "nyc": {
     "exclude": [
@@ -34,13 +33,13 @@
     "@babel/core": "^7.1.0",
     "@babel/preset-env": "^7.1.0",
     "@babel/register": "^7.0.0",
+    "@vitest/coverage-v8": "^0.34.1",
     "babel-core": "^7.0.0-bridge.0",
-    "babel-jest": "^23.6.0",
     "babel-minify-webpack-plugin": "^0.3.1",
     "clean-webpack-plugin": "^0.1.19",
     "eslint": "^5.12.0",
     "eslint-config-google": "^0.11.0",
-    "jest": "^23.6.0",
+    "vitest": "^0.34.1",
     "webpack": "^4.19.1",
     "webpack-cli": "^3.1.0"
   },

src/browser-detection.test.js

@@ -1,3 +1,5 @@
+import { describe, expect, test } from 'vitest';
+
 import {
   detectBrowserName,
   detectBrowserVersion,

src/is-deprecated.test.js

@@ -1,3 +1,5 @@
+import { expect, test } from 'vitest';
+
 import {browserIsDeprecated} from './is-deprecated';
 
 test('Should be able to detect deprecated browser from object', () => {

src/rendering-engine-detection.test.js

@@ -1,3 +1,5 @@
+import { describe, expect, test } from 'vitest';
+
 import {
   detectRenderingEngineNameAndVersion,
 } from './rendering-engine-detection';

src/rendering-engine-detection.js → src/rendering-engine-detection.ts

@@ -22,8 +22,8 @@ function detectRenderingEngineVersion(userAgent) {
  */
 function detectRenderingEngineNameAndVersion(userAgent) {
   return {
-    name: detectRenderingEngineName(),
-    version: detectRenderingEngineVersion(),
+    name: detectRenderingEngineName(userAgent),
+    version: detectRenderingEngineVersion(userAgent),
   };
 }