crunch-scrunch/src/test/scala/org/apache/crunch/scrunch/PGroupedTableTest.scala

/**
 * 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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package org.apache.crunch.scrunch

import org.junit.Test
import org.junit.Assert._

class PGroupedTableTest extends CrunchSuite {
  @Test
  def testReduceInCombine() {
    val aSum = Mem.collectionOf(("a", 1), ("a", 2), ("b", 1))
      .map{ case (a,b) => (a,b) }
      .groupByKey()
      .combine(_.reduce {_+_} )
      .asMap()
      .value()("a")

    assertEquals(3, aSum)
  }
}