@Test(expected = SamzaException.class)
  public void testGetChangelogStreamMissingSystem() {
    StorageConfig storageConfig = new StorageConfig(new MapConfig(
        ImmutableMap.of(String.format(StorageConfig.CHANGELOG_STREAM, STORE_NAME0), "changelog-stream0")));
    storageConfig.getChangelogStream(STORE_NAME0);
  }
Test verifies that the {@link StorageConfig#STORE_RESTORE_FACTORIES} which matches pattern for store.%s.factory
is not picked up as in store names list
samza-core/src/test/java/org/apache/samza/config/TestStorageConfig.java