Easiest Ever NodeJS Testing

test.js

/* Output:
   node test.js
   Testing: always_pass...passed
   Testing: always_fail...failed
   Testing: include_meaningful_results...failed
   3 Tests Completed! Passed: 1 Failed: 2
   Failed Test Output:
   {"test":"always_fail","passed":false}
   {"test":"include_meaningful_results","passed":false,"meaningful_data":"This results object will display as a JSON string if this test fails"}
*/

var tests   = [];
var results = [];

tests.push(always_pass);
tests.push(always_fail);
tests.push(include_meaningful_results);
start(); 

function w(m)     { process.stdout.write(m); }
function wl(m)    { process.stdout.write(m + '\n'); }
function start()  { var next = tests.shift(); next(); }
function finish() { wl(results[results.length - 1].passed == true ? '...passed' : '...failed');	if(tests.length) start(); else { var failed_results = []; for(var t = 0; t < results.length; t++) if(!results[t].passed) failed_results.push(results[t]);	wl(results.length + ' Tests Completed! Passed: ' + (results.length - failed_results.length) + ' Failed: ' + failed_results.length); if(failed_results.length > 0) { wl('Failed Test Output: '); for(var f = 0; f < failed_results.length; f++) wl(JSON.stringify(failed_results[f])); }	process.exit(failed_results.length); } }

function always_pass()
{
	var tag = arguments.callee.name; w('Testing: ' + tag);
	// Tests that pass are silently moved over
	results.push({test: tag, passed: true});
	finish();
}
function always_fail()
{
	var tag = arguments.callee.name; w('Testing: ' + tag);
	// Tests that fail will show their results at the end to help expose issues
	results.push({test: tag, passed: false});
	finish();
}
function include_meaningful_results()
{
	var tag = arguments.callee.name; w('Testing: ' + tag);
	// When tests fail it can be helpful to include meaningful data in results
	results.push({test: tag, passed: false, meaningful_data: 'This results object will display as a JSON string if this test fails'});
	finish();
}