public function testNotCorrectSignup()
{
$model = new SignupForm(['username' => 'troy.becker', 'email' => '[email protected]', 'password' => 'some_password']);
expect_not($model->signup());
expect_that($model->getErrors('username'));
expect_that($model->getErrors('email'));
expect($model->getFirstError('username'))->equals('This username has already been taken.');
expect($model->getFirstError('email'))->equals('This email address has already been taken.');
}