In memory sqlite always empty despite setup - sqlite

Question

I followed sitepoints Testing Symfony Apps with a Disposable Database Tutorial.
I added Fixtures in my Testcase and no Errors appear during SetUp. If i add an Error in the Fixtures (e.g. leaving a nullable=false field empty) the Error is shown, so this code does definitely get executed.
My Config:
doctrine:
dbal:
default_connection: memory
connections:
memory:
driver: pdo_sqlite
memory: true
charset: UTF8
My SetUp in my WebTestCase:
protected function setUp() {
parent::setUp();
self::bootKernel();
DatabasePrimer::prime(self::$kernel);
$this->loadFixtures([
'AppBundle\DataFixtures\ORM\UserData',
'AppBundle\DataFixtures\ORM\ArtistData'
]);
}
Yet, in my WebTestCase it appears that no Tables exist.
The output throws a Doctrine Exception saying my table does not exist.
SQLSTATE[HY000]: General error: 1 no such table: my_user_table
If i switch to sql_lite in a file, everything works fine without any other changes:
dbal:
default_connection: file
connections:
file:
driver: pdo_sqlite
path: %kernel.cache_dir%/test.db
charset: UTF8
Anyone had success with said tutorial or using a sqlite memory db for unit tests and has any hints or ideas?
Update:
I changed my Setup to this to ensure the kernel is not shut down in between. It did not help:
parent::setUp();
$this->client = $this->getClient();
MemoryDbPrimer::prime(self::$kernel);
$this->loadFixtures([
'AppBundle\DataFixtures\ORM\UserData',
'AppBundle\DataFixtures\ORM\ArtistData'
]);

Answer 1

When you
$client->request(<METHOD>, <URL>);
which calls
Symfony\Bundle\FrameworkBundleClient::doRequest($request)
After the request the kernel is shutdown by default, and your in-memory database is trashed.
If you call
client->disableReboot();
in the setup() function of your test, this will behavior is disabled, and you can run the whole suite.

Answer 2

I assume you call createClient() in your test functions. The very first thing that createClient() does is call static::bootKernel(). This basically means that the kernel you booted in your setUp() gets shut down and a new kernel is booted, with a fresh instance of the memory SQLite database.
You can move the createClient() call into your setUp(), replacing the bootKernel(), to avoid this:
class MyTest extends WebTestCase
{
private $client = null;
public function setUp()
{
$this->client = static::createClient();
// prime database
}
public function testSomething()
{
$crawler = $this->client->request('GET', '/');
// ...
}
}