'constructor with only function argument uses factory': function (done) {
var db = levelup(MemDOWN)
assert.isNull(db.location, 'location property is null')
db.on('open', function () {
assert(db.db instanceof MemDOWN, 'using a memdown backend')
assert.same(db.db.location, '', 'db location property is ""')
db.put('foo', 'bar', function (err) {
refute(err, 'no error')
db.get('foo', function (err, value) {
refute(err, 'no error')
assert.equals(value, 'bar', 'correct value')
done()
})
})
})
}