jstest.js

// Minimal unit testing for Rhino
// loosely based off minunit - http://www.jera.com/techinfo/jtns/jtn002.html
// same license as minunit - do whatever you want with no warranty
var jstest = function () {
    var pub = {};
    var currentSuite = "DefaultSuite";

    pub.testsRun = 0;

    pub.assert = function (message, test) {
        if (false == test)
            throw message;
    }

    pub.run = function (test) {
        try {
            test();
        } catch (err) {
            throw "Failed at " + currentSuite + " with: " + err;
        }
        pub.testsRun++;
    }

    pub.suite = function (suiteName) {
        currentSuite = suiteName;
    }

    return pub;
}();

test.js

load("jstest.js");

function testCase() {
    var foo = 7;
    var bar = 5;

    function testFoo() {
        jstest.assert("error, foo != 7", foo == 7);
    }

    function testBar() {
        jstest.assert("error, bar != 5", bar == 5);
    }

    jstest.suite("JSTestSuite");
    jstest.run(testFoo);
    jstest.run(testBar);
}

testCase();
print("All tests passed!");
print("Tests run: " + jstest.testsRun);