Small driver to test REST-JSON APIs with FitNesse.
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Allows to REST-JSON api with FitNesse/SLIM without writing extra java code "Fixtures or Drivers".

Driver provides methods for rest calls:

REST calls get, post, put (delete pending)

A Method to extract data from JSON.
retrieve/eval js on json.

The returned json include status, header, and body.

It also includes 
an echo function and 
a concatRandomInt to generate random Strings for testing.

It uses apache httpcomponent 4.1 and org.json library.
apache httpcomponent: have to be added to the path. (!path)
org.json: no need to add it, fitnesse.jar includes org.json. 

Simple example testing twitter:

--------- FitNesse Wiki Page ------------
!define TEST_SYSTEM {slim} 

!path /repos/fitnesse-rest-json/bin
!path /opt/httpcomponents-client-4.1/lib/*.jar
!note org.json not needed because fitNesse uses it.

Example test twitter trends, test we get a OK response and 10 trends.

!|script|net.zesc.fitnesse.driver.RestJsonDriver         |
|$json= |get        |http://api.twitter.com/1/trends.json|
|check  |retrieve js|status.code        |json |$json|=200|
|check  |retrieve js|body.trends.length |json |$json|=10 |
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