public function testSaveInserts()
{
// the return value from the find
$collectionName = 'users';
$userData = array('name' => 'Martyn', 'created_at' => new \MongoDate(time()));
$this->connectionMock->expects($this->once())->method('insert')->with($collectionName, $userData);
$user = new UserValidator($userData);
$user->save();
}