test: add test files and fix test

.gitignore

@@ -58,3 +58,4 @@ $RECYCLE.BIN/
 
 # Project files
 dist/
+test/result/

package.json

@@ -20,9 +20,9 @@
     ".": "./dist/index.js"
   },
   "scripts": {
-    "test": "npm run build && node dist/index.js",
+    "test": "npm run build && node dist/index.js 'test/src/**/*.js' -o test/result/ --debug",
     "build": "npm run format:fix && tsc && npm run minify",
-    "minify": "terser dist/index.js --config-file .terserrc -o dist/index.js",
+    "minify": "terser dist/index.js --config-file terser.config.json -o dist/index.js",
     "format": "prettier .",
     "format:fix": "prettier . --write"
   },

test/src/index.js

@@ -0,0 +1,17 @@
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
+function arrShuffle(array) {
+  if (array.length === 1) {
+    return array[0];
+  }
+
+  const newArray = array;
+
+  for (let i = array.length - 1; i > 0; i -= 1) {
+    const j = Math.floor(Math.random() * (i + 1));
+    [newArray[i], newArray[j]] = [array[j], array[i]];
+  }
+
+  return newArray;
+}
+
+export default arrShuffle;