public function shutdownSavesKeysToKeystoreFileIfKeysWereModified()
{
$this->assertFalse(file_exists('vfs://Foo/EncryptionKey'));
$keyPairUuid = $this->rsaWalletService->generateNewKeypair(true);
$this->rsaWalletService->shutdownObject();
$this->assertTrue(file_exists('vfs://Foo/EncryptionKey'));
$this->rsaWalletService->destroyKeypair($keyPairUuid);
$this->rsaWalletService->initializeObject();
$this->rsaWalletService->getPublicKey($keyPairUuid);
}