samza-kafka/src/test/java/org/apache/samza/system/kafka/TestKafkaSystemFactoryJava.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.samza.system.kafka;

import org.apache.samza.config.ApplicationConfig;
import org.apache.samza.config.KafkaConfig;
import org.apache.samza.config.MapConfig;
import org.apache.samza.system.StreamSpec;
import org.junit.Test;
import scala.collection.JavaConversions;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

public class TestKafkaSystemFactoryJava extends TestKafkaSystemAdmin {

  @Test
  public void testGetIntermediateStreamProperties() {
    Map<String, String> config = new HashMap<>();
    KafkaSystemFactory factory = new KafkaSystemFactory();
    Map<String, Properties> properties = JavaConversions.mapAsJavaMap(
        factory.getIntermediateStreamProperties(new MapConfig(config)));
    assertTrue(properties.isEmpty());

    // no properties for stream
    config.put("streams.test.samza.intermediate", "true");
    config.put("streams.test.compression.type", "lz4"); //some random config
    properties = JavaConversions.mapAsJavaMap(
        factory.getIntermediateStreamProperties(new MapConfig(config)));
    assertTrue(properties.isEmpty());

    config.put(ApplicationConfig.APP_MODE, ApplicationConfig.ApplicationMode.BATCH.name());

    KafkaSystemAdmin admin = createSystemAdmin(SYSTEM(), config);
    StreamSpec spec = new StreamSpec("test", "test", SYSTEM(),
        Collections.singletonMap("replication.factor", "1"));
    KafkaStreamSpec kspec = admin.toKafkaSpec(spec);

    Properties prop = kspec.getProperties();
    assertEquals(prop.getProperty("retention.ms"), String.valueOf(KafkaConfig.DEFAULT_RETENTION_MS_FOR_BATCH()));
    assertEquals(prop.getProperty("compression.type"), "lz4");

    // replication.factor should be removed from the properties and set on the spec directly
    assertEquals(kspec.getReplicationFactor(), 1);
    assertNull(prop.getProperty("replication.factor"));
  }
}