add: tests implementations

.eslintrc.js

@@ -2,7 +2,7 @@ module.exports = {
   parser: '@typescript-eslint/parser',
   parserOptions: {
     project: 'tsconfig.json',
-    tsconfigRootDir : __dirname, 
+    tsconfigRootDir: __dirname,
     sourceType: 'module',
   },
   plugins: ['@typescript-eslint/eslint-plugin'],

.prettierrc

@@ -1,4 +1,4 @@
 {
   "singleQuote": true,
   "trailingComma": "all"
-}
+}

README.md

@@ -5,11 +5,12 @@
 ---
 
 ### Prerequisites
-1. Install [Node.js](https://nodejs.org/en/download/)   
+
+1. Install [Node.js](https://nodejs.org/en/download/)
 2. Fork this repository: https://github.com/AlreadyBored/basic-testing
-3. Clone your newly created repo locally: https://github.com/<%your_github_username%>/basic-testing/  
-4. Go to folder `basic-testing`  
-5. To install all dependencies use [`npm install`](https://docs.npmjs.com/cli/install)  
+3. Clone your newly created repo locally: https://github.com/<%your_github_username%>/basic-testing/
+4. Go to folder `basic-testing`
+5. To install all dependencies use [`npm install`](https://docs.npmjs.com/cli/install)
 6. Run **test scripts** in command line.
 7. You will see the number of skipped, passing and failing tests.
 
@@ -28,14 +29,16 @@ $ npm run test:verbose
 ---
 
 #### Notes
+
 1. We recommend you to use Node.js of version 24.x.x (24.10.0 or upper) LTS. If you use any of features, that does not supported by Node.js 24, there may be problems with task submit.
 2. Please, be sure that each of your tests is limited to 30 sec.
 3. Please, be sure you don't have any linter/TS compiler errors.
 
 ---
 
 ## General task description
-Your task is to write unit tests for code, provided in file `index.ts`. 
+
+Your task is to write unit tests for code, provided in file `index.ts`.
 
 ---
 
@@ -55,7 +58,6 @@ Write your tests in `src/02-table-tests/index.test.ts`.
 
 ---
 
-
 ### **Error handling & async**
 
 Your task is to test functions that work asynchronously/throw/reject exceptions..

babel.config.js

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