Example of using nested teardowns

gistfile1.js

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

var suite = vows.describe('test teardown callback');

suite.addBatch({
    'when we do an async operation': {
        topic: function() {
            var cb = this.callback;
            process.nextTick(function() {
                cb(null, 42);
            });
        },
        'it works': function(err, value) {
            assert.ifError(err);
            assert.equal(value, 42);
        },
        teardown: function(value) {
            var cb = this.callback;
            setTimeout(function() {
                console.log("Second (?) teardown");
                cb(null);
            }, 1000);
        },
        'and we do a sub-context': {
            topic: function() {
                var cb = this.callback;
                process.nextTick(function() {
                    cb(null, 23);
                });
            },
            'it works': function(err, value) {
                assert.ifError(err);
                assert.equal(value, 23);
            },
            teardown: function(value) {
                var cb = this.callback;
                setTimeout(function() {
                    console.log("First (?) teardown");
                    cb(null);
                }, 5000);
            }
        }
    }
});

suite['export'](module);