public function testDeleteUser()
{
$email = '*****@*****.**';
$user = $this->userManager->createUser($email, 'password');
$this->userManager->insert($user);
$this->assertEquals($user, $this->userManager->findOneBy(array('email' => $email)));
$this->userManager->delete($user);
$this->assertNull($this->userManager->findOneBy(array('email' => $email)));
}