samza-api/src/test/java/org/apache/samza/system/descriptors/TestExpandingInputDescriptor.java

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 * 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
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package org.apache.samza.system.descriptors;

import java.util.Collections;
import org.apache.samza.system.descriptors.examples.expanding.ExampleExpandingInputDescriptor;
import org.apache.samza.system.descriptors.examples.expanding.ExampleExpandingOutputDescriptor;
import org.apache.samza.system.descriptors.examples.expanding.ExampleExpandingSystemDescriptor;
import org.apache.samza.serializers.IntegerSerde;
import org.apache.samza.system.SystemStreamMetadata;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class TestExpandingInputDescriptor {
  public void testAPIUsage() {
    // does not assert anything, but acts as a compile-time check on expected descriptor type parameters
    // and validates that the method calls can be chained.
    ExampleExpandingSystemDescriptor expandingSystem = new ExampleExpandingSystemDescriptor("expandingSystem");
    ExampleExpandingInputDescriptor<Long> input1 = expandingSystem.getInputDescriptor("input1", new IntegerSerde());
    ExampleExpandingOutputDescriptor<Integer> output1 = expandingSystem.getOutputDescriptor("output1", new IntegerSerde());

    input1
        .shouldBootstrap()
        .withOffsetDefault(SystemStreamMetadata.OffsetType.NEWEST)
        .withPriority(1)
        .shouldResetOffset()
        .withStreamConfigs(Collections.emptyMap());

    output1
        .withStreamConfigs(Collections.emptyMap());
  }

  @Test
  public void testISDObjectsWithOverrides() {
    ExampleExpandingSystemDescriptor expandingSystem = new ExampleExpandingSystemDescriptor("expandingSystem");
    IntegerSerde streamSerde = new IntegerSerde();
    ExampleExpandingInputDescriptor<Long> expandingISD = expandingSystem.getInputDescriptor("input-stream", streamSerde);

    assertEquals(streamSerde, expandingISD.getSerde());
    assertEquals(expandingSystem.getTransformer().get(), expandingISD.getTransformer().get());
  }
}