external/storm-kafka-client/src/test/java/org/apache/storm/kafka/spout/SimpleRecordTranslatorTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you under the Apache License, Version 2.0 (the
 *   "License"); you may not use this file except in compliance
 *   with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
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 *   See the License for the specific language governing permissions and
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 */
package org.apache.storm.kafka.spout;

import static org.junit.Assert.assertEquals;

import java.util.Arrays;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;
import org.junit.Test;

public class SimpleRecordTranslatorTest {
    @Test
    public void testBasic() {
        SimpleRecordTranslator<String, String> trans =
                new SimpleRecordTranslator<>((r) -> new Values(r.value()), new Fields("value"));
        assertEquals(Arrays.asList("default"), trans.streams());
        ConsumerRecord<String, String> cr = new ConsumerRecord<>("TOPIC", 100, 100, "THE KEY", "THE VALUE");
        assertEquals(Arrays.asList("THE VALUE"), trans.apply(cr));
    }

    @Test
    public void testNullTranslation() {
        SimpleRecordTranslator<String, String> trans =
                new SimpleRecordTranslator<>((r) -> null, new Fields("key"));
        assertEquals(null, trans.apply(null));
    }
}