A little javascript test runner for node.js

Suteki.TestRunner.js

// run unit tests in node like this:
// node Suteki.TestRunner.js
//
// Unit tests should be named like this:
// Suteki.<name target>.Tests.js
//
// A test looks like this:
// 
// (function(){
//
//     exports.this_test_is_ok = function(assert) {
//         assert(true, "should work fine?");
//     };
//
//     exports.this_test_will_fail = function(assert) {
//         assert(false, "hi, I've failed");
//     };
//
//     exports.this_test_throws = function(assert) {
//         throw new Error("Damn!");
//     };
//
// }());

(function(){

    var getFilesInCurrentDirectory = function(){
        var fs = require('fs');
        return fs.readdirSync('.');
    };

    var filterUnitTests = function(allFiles){
        var i, fileName;
        var unitTests = [];
        for(i=0; i<allFiles.length; i++){
            fileName = allFiles[i];
            // identify test:
            // Suteki.<name of target>.Tests.js
            if(/Suteki\.([0-9\.\-_A-Za-z]+)\.Tests\.js/.test(fileName)){

                // add the filename minus the .js extension
                unitTests.push(fileName.replace(/\.js$/, ""));
            }
        }
        return unitTests;
    };

    var runTest = function(testName){
        var testFunction;
        var unitTest = require("./" + testName);
        var run = 0;
        var succeeded = 0;
        var failed = false;

        console.log("");
        console.log(testName);
        console.log("-------------------------------------------------------");

        if(unitTest){
            for(testFunction in unitTest){
                if(unitTest.hasOwnProperty(testFunction)){
                    run++;
                    failed = false;
                    console.log(">>> " + testFunction.replace(/_/g, " "));

                    try{
                        unitTest[testFunction](function(passed, message){
                            if(!passed){
                                console.log("FAILED " + (message || ""));
                                failed = true;
                            }
                        });
                    } catch(exception) {
                        failed = true;
                        console.log("FAILED with error: '" + exception.message + "'");
                        console.log(exception.stack);
                    }

                    if(!failed){
                        succeeded++;
                    }
                }
            }

            console.log("Ran " + run + ", Failed " + (run - succeeded) + ", Passed " + succeeded);
        }
        else {
            console.log("Could not load test '" + testName + "'")
        }

        return { ran:run, succeeded:succeeded };
    };

    // main
    (function(){
        var i, unitTest, testResult;
        var unitTests = filterUnitTests(getFilesInCurrentDirectory());
        var ran = 0;
        var succeeded = 0;

        for(i=0; i<unitTests.length; i++){
            unitTest = unitTests[i];
            testResult = runTest(unitTest);
            ran = ran + testResult.ran;
            succeeded = succeeded + testResult.succeeded;
        }

        console.log("");
        console.log("Tests complete");
        console.log("Fixtures: " + unitTests.length + ", Ran: " + ran + ", Failed: " + (ran - succeeded));
        console.log("");
    }());

}());

Output looks like this:

$ node Suteki.TestRunner.js

Suteki.EventBus.Tests
-------------------------------------------------------
>>> should be able to publish and subscribe
>>> should throw an exception
FAILED with error: 'Shit!'
Error: Shit!
    at Object.should_throw_an_exception (/cygdrive/d/Source/Suteki.NodePlay/js/Suteki.EventBus.Tests.js:38:
15)
    at /cygdrive/d/Source/Suteki.NodePlay/js/Suteki.TestRunner.js:49:46
    at /cygdrive/d/Source/Suteki.NodePlay/js/Suteki.TestRunner.js:85:26
    at /cygdrive/d/Source/Suteki.NodePlay/js/Suteki.TestRunner.js:94:5
    at Object.<anonymous> (/cygdrive/d/Source/Suteki.NodePlay/js/Suteki.TestRunner.js:96:1)
    at Module._compile (node.js:462:23)
    at Module._loadScriptSync (node.js:469:10)
    at Module.loadSync (node.js:338:12)
    at Object.runMain (node.js:522:24)
    at Array.0 (node.js:756:12)
>>> should be able to subscribe and unsubscribe
Ran 3, Failed 1, Passed 2

Tests complete
Fixtures: 1, Ran: 3, Failed: 1