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 * to you under the Apache License, Version 2.0 (the
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package org.apache.storm.eventhubs.trident;

import java.util.Map;
import org.apache.storm.eventhubs.spout.EventHubReceiverMock;
import org.apache.storm.eventhubs.spout.EventHubSpoutConfig;
import org.apache.storm.eventhubs.spout.IEventHubReceiver;
import org.apache.storm.eventhubs.spout.IEventHubReceiverFactory;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertTrue;

public class TestTransactionalTridentEmitter {
    private final int batchSize = 32;
    private TransactionalTridentEventHubEmitter emitter;
    private Partition partition;
    private TridentCollectorMock collectorMock;

    @BeforeEach
    public void setUp() throws Exception {
        EventHubSpoutConfig conf = new EventHubSpoutConfig("username", "password",
                                                           "namespace", "entityname", 16, "zookeeper");
        conf.setTopologyName("TestTopo");
        IEventHubReceiverFactory recvFactory = new IEventHubReceiverFactory() {
            @Override
            public IEventHubReceiver create(EventHubSpoutConfig config,
                                            String partitionId) {
                return new EventHubReceiverMock(partitionId);
            }
        };
        partition = new Partition(conf, "0");
        emitter = new TransactionalTridentEventHubEmitter(conf, batchSize, null, recvFactory);
        collectorMock = new TridentCollectorMock();
    }

    @AfterEach
    public void tearDown() throws Exception {
        emitter.close();
        emitter = null;
    }

    @Test
    public void testEmitInSequence() {
        //test the happy path, emit batches in sequence
        Map<String, Object> meta = emitter.emitPartitionBatchNew(null, collectorMock, partition, null);
        String collected = collectorMock.getBuffer();
        assertTrue(collected.startsWith("message" + 0));
        //System.out.println("collected: " + collected);
        collectorMock.clear();

        emitter.emitPartitionBatchNew(null, collectorMock, partition, meta);
        collected = collectorMock.getBuffer();
        //System.out.println("collected: " + collected);
        assertTrue(collected.startsWith("message" + batchSize));
    }

    @Test
    public void testReEmit() {
        //test we can re-emit the second batch
        Map<String, Object> meta = emitter.emitPartitionBatchNew(null, collectorMock, partition, null);
        collectorMock.clear();

        //emit second batch
        Map<String, Object> meta1 = emitter.emitPartitionBatchNew(null, collectorMock, partition, meta);
        String collected0 = collectorMock.getBuffer();
        collectorMock.clear();

        //re-emit second batch
        emitter.emitPartitionBatch(null, collectorMock, partition, meta1);
        String collected1 = collectorMock.getBuffer();
        assertTrue(collected0.equals(collected1));
    }
}
