}

    private static class TestIngestFactory extends IngestFactory {
        List<Ingester> ingesters = new ArrayList<>();

        @Override
        public Ingester[] getIngesters() {
            return ingesters.toArray(new Ingester[0]);
        }
    }

    private static class TestIngester extends Ingester {
        int processCalled = 0;

        @Override

        @Override
        public Ingester[] getIngesters() {
            return new Ingester[] { new TestIngester(throwException) };
        }

        public void setThrowException(boolean throwException) {
            this.throwException = throwException;
        }
    }

    private static class TestIngester extends Ingester {
        private final boolean throwException;