78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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package org.nd4j.linalg.function;
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import org.junit.Test;
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import org.nd4j.linalg.primitives.Pair;
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import java.util.*;
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import static org.junit.Assert.assertEquals;
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public class FunctionalUtilsTest {
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@Test
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public void testCoGroup() {
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List<Pair<String,String>> leftMap = new ArrayList<>();
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List<Pair<String,String>> rightMap = new ArrayList<>();
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leftMap.add(Pair.of("cat","adam"));
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leftMap.add(Pair.of("dog","adam"));
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rightMap.add(Pair.of("fish","alex"));
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rightMap.add(Pair.of("cat","alice"));
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rightMap.add(Pair.of("dog","steve"));
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//[(fish,([],[alex])), (dog,([adam],[steve])), (cat,([adam],[alice]))]
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Map<String,Pair<List<String>,List<String>>> assertion = new HashMap<>();
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assertion.put("cat",Pair.of(Arrays.asList("adam"),Arrays.asList("alice")));
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assertion.put("dog",Pair.of(Arrays.asList("adam"),Arrays.asList("steve")));
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assertion.put("fish",Pair.of(Collections.<String>emptyList(),Arrays.asList("alex")));
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Map<String, Pair<List<String>, List<String>>> cogroup = FunctionalUtils.cogroup(leftMap, rightMap);
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assertEquals(assertion,cogroup);
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}
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@Test
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public void testGroupBy() {
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List<Pair<Integer,Integer>> list = new ArrayList<>();
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for(int i = 0; i < 10; i++) {
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for(int j = 0; j < 5; j++) {
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list.add(Pair.of(i, j));
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}
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}
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Map<Integer, List<Integer>> integerIterableMap = FunctionalUtils.groupByKey(list);
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assertEquals(10,integerIterableMap.keySet().size());
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assertEquals(5,integerIterableMap.get(0).size());
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}
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@Test
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public void testMapToPair() {
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Map<String,String> map = new HashMap<>();
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for(int i = 0; i < 5; i++) {
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map.put(String.valueOf(i),String.valueOf(i));
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}
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List<Pair<String, String>> pairs = FunctionalUtils.mapToPair(map);
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assertEquals(map.size(),pairs.size());
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}
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}
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