readme update

Author: xobotyi

README.md

@@ -48,9 +48,25 @@ All properties and methods are in the [API Documentation](https://github.com/xob
 ## Examples
 Run the example, it will install dependencies, build current component version and run local web-server listening `localhost:3000` (browser window will open automatically)
 ```bash
+# install dependencies if you haven't yet
+npm install
 npm run examples
 ```
 
+## Tests
+```bash
+# install dependencies if you haven't yet
+npm install
+npm run test
+```
+
+## Coverage
+```bash
+# install dependencies if you haven't yet
+npm install
+npm run test:coverage
+```
+
 ## Credits
 Big thanks to [@malte-wessel](https://github.com/malte-wessel) with his [react-custom-scrollbars](https://github.com/malte-wessel/react-custom-scrollbars) which I used before writing this component.  
 So don't be wondered that repos and code look similar in some places, his package used as ethalon. And for the users convenience i've tried to make API's seamless as much as it possible.