Drop MongoDB database before running Mocha test

solved by connect in another define.. not sure if ideal.

describe('Init', function() {    before(function (done) {           mongoose.connect('mongodb://localhost/db-test', function(){            mongoose.connection.db.dropDatabase(function(){                done()            })            })    })    describe('Database', function() {

I implemented it a bit different.

1. I removed all documents in the "before" hook - found it a lot faster than dropDatabase().

2. I used Promise.all() to make sure all documents were removed before exiting the hook.

   beforeEach(function (done) {    function clearDB() {        var promises = [            Model1.remove().exec(),            Model2.remove().exec(),            Model3.remove().exec()        ];        Promise.all(promises)            .then(function () {                done();            })    }    if (mongoose.connection.readyState === 0) {        mongoose.connect(config.dbUrl, function (err) {            if (err) {                throw err;            }            return clearDB();        });    } else {        return clearDB();    }});