org.apache.crunch.util.PartitionUtilsTest.java Source code

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Here is the source code for org.apache.crunch.util.PartitionUtilsTest.java

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/*
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 *  * distributed with this work for additional information
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 *  * "License"); you may not use this file except in compliance
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package org.apache.crunch.util;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.when;

import org.apache.crunch.PCollection;
import org.apache.crunch.Pipeline;
import org.apache.hadoop.conf.Configuration;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class PartitionUtilsTest {

    @Mock
    private PCollection<String> pcollection;

    @Mock
    private Pipeline pipeline;

    @Test
    public void testBasic() throws Exception {
        Configuration conf = new Configuration();
        when(pcollection.getSize()).thenReturn(7 * 1000L * 1000L * 1000L);
        when(pcollection.getPipeline()).thenReturn(pipeline);
        when(pipeline.getConfiguration()).thenReturn(conf);
        assertEquals(8, PartitionUtils.getRecommendedPartitions(pcollection));
    }

    @Test
    public void testBytesPerTask() throws Exception {
        Configuration conf = new Configuration();
        conf.setLong(PartitionUtils.BYTES_PER_REDUCE_TASK, 500L * 1000L * 1000L);
        when(pcollection.getSize()).thenReturn(7 * 1000L * 1000L * 1000L);
        when(pcollection.getPipeline()).thenReturn(pipeline);
        when(pipeline.getConfiguration()).thenReturn(conf);
        assertEquals(15, PartitionUtils.getRecommendedPartitions(pcollection));
    }

    @Test
    public void testDefaultMaxRecommended() throws Exception {
        Configuration conf = new Configuration();
        when(pcollection.getSize()).thenReturn(1000 * 1000L * 1000L * 1000L);
        when(pcollection.getPipeline()).thenReturn(pipeline);
        when(pipeline.getConfiguration()).thenReturn(conf);
        assertEquals(500, PartitionUtils.getRecommendedPartitions(pcollection));
    }

    @Test
    public void testMaxRecommended() throws Exception {
        Configuration conf = new Configuration();
        conf.setInt(PartitionUtils.MAX_REDUCERS, 400);
        when(pcollection.getSize()).thenReturn(1000 * 1000L * 1000L * 1000L);
        when(pcollection.getPipeline()).thenReturn(pipeline);
        when(pipeline.getConfiguration()).thenReturn(conf);
        assertEquals(400, PartitionUtils.getRecommendedPartitions(pcollection));
    }

    @Test
    public void testNegativeMaxRecommended() throws Exception {
        Configuration conf = new Configuration();
        conf.setInt(PartitionUtils.MAX_REDUCERS, -1);
        when(pcollection.getSize()).thenReturn(1000 * 1000L * 1000L * 1000L);
        when(pcollection.getPipeline()).thenReturn(pipeline);
        when(pipeline.getConfiguration()).thenReturn(conf);
        assertEquals(1001, PartitionUtils.getRecommendedPartitions(pcollection));
    }
}