Run node.js tests, each in their own node process.

foo.test.js

var assert = require('assert')
  , path = require('path')

function some_helper(foo) {
	assert.equal(foo, 4)
}

module.exports = {
	'test array length': function (test) {
		some_helper([1,2,3,4].length)
		test.finish()
	},
	'test async stuff': function (test) {
		path.exists('/etc/passwd', function (exists) {
			assert.ok(exists)
			test.finish()
		})
	}
}

run-tests.js

var fs = require('fs')
  , path = require('path')
  , spawn = require('child_process').spawn
  , sys = require('sys')

if (process.argv.length == 4) {
	// run a particular test
	var test = {
		finish: function () {
			test._finished++
		},
		_finished: 0
	}
	process.on('exit', function () {
		if (test._finished == 1) {
			process.reallyExit(0)
		} else {
			if (test._finished == 0) {
				sys.puts("Test didn't call finish().")
			} else {
				sys.puts("Test called finish()", test._finished, "times.")
			}
			process.reallyExit(1)
		}
	})
	require(process.argv[2])[process.argv[3]](test)
} else {
	var test_files = fs.readdirSync('./test')
	.filter(function (file) {
		return file.match(/\.test\.js$/)
	})
	.map(function (file) {
		return './test/' + file
	})

	var tests = []
	test_files.forEach(function (tf) {
		Object.keys(require(tf)).forEach(function (test) {
			tests.push({ file: tf, test: test })
		})
	})

	function name(t) {
		return path.basename(t.file).match(/^(.+?)\.test\.js$/)[1] + '/' + t.test
	}

	function run() {
		if (tests.length <= 0) return
			var t = tests.shift()
		sys.print(name(t), '... ')
		var output = ''
		var runner = spawn(process.execPath, [__filename, t.file, t.test])
		runner.on('exit', function (code) {
			if (code == 0) {
				sys.puts('passed')
			} else {
				sys.puts('failed')
				sys.puts(output)
			}
			run()
		})
		runner.stdout.on('data', function (data) {
			output += data
		})
		runner.stderr.on('data', function (data) {
			output += data
		})
	}

	run()
}