revertMigration example

->get(SalesChannelContextFactory::class)
            ->create('test', TestDefaults::SALES_CHANNEL);

        $this->loader = $this->getContainer()->get(ProductConfiguratorLoader::class);

        $this->connection = $this->getContainer()->get(Connection::class);
    }

    public function testMigration(): void
    {
        $this->connection->rollBack();
        $this->revertMigration();

        $hasIndex = $this->hasIndex();

        static::assertFalse($hasIndex);

        $this->executeMigration();

        $hasIndex = $this->hasIndex();

        static::assertTrue($hasIndex);

        

class Migration1687462843ProductManufacturerMediaThumbnailsTest extends TestCase
{
    use KernelTestBehaviour;

    public function testUpdate(): void
    {
        /** @var Connection $con */
        $con = $this->getContainer()->get(Connection::class);

        if (\count($this->thumbnailSizesIds($con)) > 1) {
            $this->revertMigration($con);
        }

        // 1920px is already registered         static::assertCount(1, $this->thumbnailSizesIds($con));

        $productManufacturerFolderConfigurationId = $this->getProductManufacturerFolderConfigurationId($con);

        static::assertNotNull($productManufacturerFolderConfigurationId);

        static::assertCount(0, $this->getConfiguredThumbnailSizeIds($con, $productManufacturerFolderConfigurationId));

        

class Migration1687463180ProductMediaThumbnailsTest extends TestCase
{
    use KernelTestBehaviour;

    public function testUpdate(): void
    {
        /** @var Connection $con */
        $con = $this->getContainer()->get(Connection::class);

        if ($this->thumbnailSizesIds($con) !== []) {
            $this->revertMigration($con);
        }

        static::assertCount(0, $this->thumbnailSizesIds($con));

        $productManufacturerFolderConfigurationId = $this->getProductFolderConfigurationId($con);

        static::assertNotNull($productManufacturerFolderConfigurationId);

        $beforeConfiguredThumbnailSizeIds = $this->getConfiguredThumbnailSizeIds($con, $productManufacturerFolderConfigurationId);

        $m = new Migration1687463180ProductMediaThumbnails();