| /** |
| * 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, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.crunch.lib; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.crunch.PCollection; |
| import org.apache.crunch.impl.mem.MemPipeline; |
| import org.apache.crunch.types.avro.Avros; |
| import org.junit.Test; |
| |
| import com.google.common.collect.ImmutableSet; |
| |
| public class DistinctTest { |
| private static final List<Integer> DATA = Arrays.asList( |
| 17, 29, 17, 29, 17, 29, 36, 45, 17, 45, 36, 29 |
| ); |
| |
| @Test |
| public void testDistinct() { |
| PCollection<Integer> input = MemPipeline.typedCollectionOf(Avros.ints(), DATA); |
| Iterable<Integer> unique = Distinct.distinct(input).materialize(); |
| |
| assertEquals(ImmutableSet.copyOf(DATA), ImmutableSet.copyOf(unique)); |
| } |
| |
| @Test |
| public void testDistinctFlush() { |
| PCollection<Integer> input = MemPipeline.typedCollectionOf(Avros.ints(), DATA); |
| Iterable<Integer> unique = Distinct.distinct(input, 2).materialize(); |
| |
| assertEquals(ImmutableSet.copyOf(DATA), ImmutableSet.copyOf(unique)); |
| } |
| } |