helpers/index.js
function dropDatabase (db, fn) {
  db.connection.db.executeDbCommand({
    dropDatabase: 1
  }, function(err, result) {
    db.disconnect()
    fn && fn(err, result)
  })
}
function dropDatabase (db, fn) {
  db.connection.db.executeDbCommand({
    dropDatabase: 1
  }, function(err, result) {
    db.disconnect()
    fn && fn(err, result)
  })
}
function dropDatabase ( db , fn ) { db . connection . db . executeDbCommand ( { dropDatabase : 1 } , function ( err , result ) { db . disconnect ( ) fn && fn ( err , result ) } ) }
Destroy a database and disconnect
Destroy a database and disconnect