var vows = require('vows'),
    assert = require('assert');

vows.describe('Deep Thought').addBatch({
    'An instance of DeepThought': {
        topic: new DeepThought,

        'should know the answer to the ultimate question of life': function (deepThought) {
            assert.equal (deepThought.question('what is the answer to the universe?'), 42);
        }
    }
});

$ npm install vows

vows.describe('A Database library').addBatch({
    'A DB object': {
        // run this once, and execute the following tests when it completes
        topic: function () { return new(DB) },

        'set() should store a k/v pair': {
            // the inner context gets the return values of the outer contexts
            // passed as arguments. Here, `db` is new(DB).
            topic: function (db) { return db.set('pulp', 'orange') },

            // `res` is the value emitted by the above `db.set`
            'and return OK': function (res) {
                assert.equal(res, "OK");
            },
            'and when checked for existence': {
                // here, we need to access `db`, from the parent context.
                // It's passed as the 2nd argument to `topic`, we discard the first,
                // which would have been the above `res`.
                topic: function (_, db) { return db.exists('pulp') },

                'return true': function (re) {
                    assert.equal(re, true);
                }
            }
        },
        'get()': {
            topic: function (db) { return db.get('dream') },
            'should return the stored value': function (res) {
                assert.equal(res, 'catcher');
            }
        }
    }
}).run();