removeAddedSalesChannel example

private Connection $connection;

    protected function setUp(): void
    {
        $this->connection = $this->getContainer()->get(Connection::class);
        $this->removeAddedDefaultDomains();
    }

    protected function tearDown(): void
    {
        $this->removeAddedDefaultDomains();
        $this->removeAddedSalesChannel();
    }

    public function testItAddsDefaultDomainToHeadlessSalesChannel(): void
    {
        $statement = $this->connection->prepare('SELECT COUNT(*) FROM `sales_channel_domain` WHERE `sales_channel_id` = :salesChannelId');
        $statement->bindValue('salesChannelId', Uuid::fromHexToBytes(TestDefaults::SALES_CHANNEL));

        $result = $statement->executeQuery();
        static::assertEquals(0, $result->fetchOne());

        (new Migration1620820321AddDefaultDomainForHeadlessSaleschannel())->update($this->connection);