@Test
public void testGetClientWithDefaultRegion() {

    DynamoDBClientFetcher dynamoDBClientFetcher = new DynamoDBClientFetcherImpl("testRegion");
    PrivateKeyStore keyStore = Mockito.mock(PrivateKeyStore.class);
    ZTSClientNotificationSender ztsClientNotificationSender = Mockito.mock(ZTSClientNotificationSender.class);
    AmazonDynamoDB dynamoDBClient = dynamoDBClientFetcher.getDynamoDBClient(ztsClientNotificationSender, keyStore).getAmazonDynamoDB();
    assertNotNull(dynamoDBClient);
}