Update README.md

README.md

@@ -3,3 +3,32 @@ A test project, using FizzBuzz, to learn Node, Travis, NPM, etc.
 
 [![Build Status](https://travis-ci.org/CeeJayCee/fizzbuzz.svg?branch=master)](https://travis-ci.org/CeeJayCee/fizzbuzz)
 [![Coverage Status](https://coveralls.io/repos/github/CeeJayCee/fizzbuzz/badge.svg?branch=master)](https://coveralls.io/github/CeeJayCee/fizzbuzz?branch=master)
+
+## What does it do?
+
+This implementation of [FizzBuzz](https://en.wikipedia.org/wiki/Fizz_buzz) will return an array of *n* strings, where the strings obey the follow rules:
+* if the number is divisible by 3, return fizz
+* if the number is divisible by 5, return buzz
+* if the number is divisible by 7, return bazz
+* else return the number
+
+If the current number matches multiple rules, it will concatenate the results together.
+
+So, for example, calling `fizzbuzz(10)` will return the following
+
+    ['1', '2', 'fizz', '4', 'buzz', 'fizz', 'bazz', '8', 'fizz', 'buzz']
+
+## Testing
+
+Testing is provided by the [Jest library](https://facebook.github.io/jest/).
+To run the tests:
+
+    npm test
+
+## Code Coverage
+
+Code coverage is provided by the Jest library and published using [Coveralls](https://coveralls.io/github/CeeJayCee/fizzbuzz?branch=master).
+
+## Building
+
+The project is automatically built and tested using [Travis-CI](https://travis-ci.org/CeeJayCee/fizzbuzz).