ShardConsumerTest.java example

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 * (the "License"); you may not use this file except in compliance with
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 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.flink.streaming.connectors.kinesis.internals;

import com.amazonaws.services.kinesis.model.HashKeyRange;
import com.amazonaws.services.kinesis.model.Shard;
import org.apache.commons.lang.StringUtils;
import org.apache.flink.streaming.connectors.kinesis.model.KinesisStreamShard;
import org.apache.flink.streaming.connectors.kinesis.model.KinesisStreamShardState;
import org.apache.flink.streaming.connectors.kinesis.model.SentinelSequenceNumber;
import org.apache.flink.streaming.connectors.kinesis.model.SequenceNumber;
import org.apache.flink.streaming.connectors.kinesis.proxy.KinesisProxyInterface;
import org.apache.flink.streaming.connectors.kinesis.testutils.FakeKinesisBehavioursFactory;
import org.apache.flink.streaming.connectors.kinesis.testutils.KinesisShardIdGenerator;
import org.apache.flink.streaming.connectors.kinesis.testutils.TestableKinesisDataFetcher;
import org.junit.Test;
import org.mockito.Mockito;

import java.math.BigInteger;
import java.util.Collections;
import java.util.LinkedList;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicReference;

import static org.junit.Assert.assertTrue;

public class ShardConsumerTest {

	@Test
	public void testCorrectNumOfCollectedRecordsAndUpdatedState() {
		KinesisStreamShard fakeToBeConsumedShard = new KinesisStreamShard(
			"fakeStream",
			new Shard()
				.withShardId(KinesisShardIdGenerator.generateFromShardOrder(0))
				.withHashKeyRange(
					new HashKeyRange()
						.withStartingHashKey("0")
						.withEndingHashKey(new BigInteger(StringUtils.repeat("FF", 16), 16).toString())));

		LinkedList<KinesisStreamShardState> subscribedShardsStateUnderTest = new LinkedList<>();
		subscribedShardsStateUnderTest.add(
			new KinesisStreamShardState(fakeToBeConsumedShard, new SequenceNumber("fakeStartingState")));

		TestableKinesisDataFetcher fetcher =
			new TestableKinesisDataFetcher(
				Collections.singletonList("fakeStream"),
				new Properties(),
				10,
				2,
				new AtomicReference<Throwable>(),
				subscribedShardsStateUnderTest,
				KinesisDataFetcher.createInitialSubscribedStreamsToLastDiscoveredShardsState(Collections.singletonList("fakeStream")),
				Mockito.mock(KinesisProxyInterface.class));

		new ShardConsumer<>(
			fetcher,
			0,
			subscribedShardsStateUnderTest.get(0).getKinesisStreamShard(),
			subscribedShardsStateUnderTest.get(0).getLastProcessedSequenceNum(),
			FakeKinesisBehavioursFactory.totalNumOfRecordsAfterNumOfGetRecordsCalls(1000, 9)).run();

		assertTrue(fetcher.getNumOfElementsCollected() == 1000);
		assertTrue(subscribedShardsStateUnderTest.get(0).getLastProcessedSequenceNum().equals(
			SentinelSequenceNumber.SENTINEL_SHARD_ENDING_SEQUENCE_NUM.get()));
	}

	@Test
	public void testCorrectNumOfCollectedRecordsAndUpdatedStateWithUnexpectedExpiredIterator() {
		KinesisStreamShard fakeToBeConsumedShard = new KinesisStreamShard(
			"fakeStream",
			new Shard()
				.withShardId(KinesisShardIdGenerator.generateFromShardOrder(0))
				.withHashKeyRange(
					new HashKeyRange()
						.withStartingHashKey("0")
						.withEndingHashKey(new BigInteger(StringUtils.repeat("FF", 16), 16).toString())));

		LinkedList<KinesisStreamShardState> subscribedShardsStateUnderTest = new LinkedList<>();
		subscribedShardsStateUnderTest.add(
			new KinesisStreamShardState(fakeToBeConsumedShard, new SequenceNumber("fakeStartingState")));

		TestableKinesisDataFetcher fetcher =
			new TestableKinesisDataFetcher(
				Collections.singletonList("fakeStream"),
				new Properties(),
				10,
				2,
				new AtomicReference<Throwable>(),
				subscribedShardsStateUnderTest,
				KinesisDataFetcher.createInitialSubscribedStreamsToLastDiscoveredShardsState(Collections.singletonList("fakeStream")),
				Mockito.mock(KinesisProxyInterface.class));

		new ShardConsumer<>(
			fetcher,
			0,
			subscribedShardsStateUnderTest.get(0).getKinesisStreamShard(),
			subscribedShardsStateUnderTest.get(0).getLastProcessedSequenceNum(),
			// Get a total of 1000 records with 9 getRecords() calls,
			// and the 7th getRecords() call will encounter an unexpected expired shard iterator
			FakeKinesisBehavioursFactory.totalNumOfRecordsAfterNumOfGetRecordsCallsWithUnexpectedExpiredIterator(1000, 9, 7)).run();

		assertTrue(fetcher.getNumOfElementsCollected() == 1000);
		assertTrue(subscribedShardsStateUnderTest.get(0).getLastProcessedSequenceNum().equals(
			SentinelSequenceNumber.SENTINEL_SHARD_ENDING_SEQUENCE_NUM.get()));
	}

}