StreamUtilsTest.java
/*
* Copyright 2020 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed 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.keycloak.models.map.common;
import org.keycloak.models.map.common.StreamUtils.Pair;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
/**
*
* @author hmlnarik
*/
public class StreamUtilsTest {
@Test
public void testLeftInnerJoinStream() {
Stream<Integer> a = Stream.of(0,1,2,3,4);
Stream[] b = new Stream[] {
Stream.of(1,2),
Stream.of(1,2),
null,
null,
Stream.of(5, 6, 7),
};
try (Stream<Pair<Integer, Integer>> res = StreamUtils.leftInnerJoinStream(a, n -> b[n])) {
final List<Pair<Integer, Integer>> l = res.collect(Collectors.toList());
assertEquals(l, Arrays.asList(
new Pair<>(0, 1),
new Pair<>(0, 2),
new Pair<>(1, 1),
new Pair<>(1, 2),
new Pair<>(4, 5),
new Pair<>(4, 6),
new Pair<>(4, 7)
));
}
}
@Test
public void testLeftInnerJoinIterable() {
Stream<Integer> a = Stream.of(0,1,2,3,4);
Iterable[] b = new Iterable[] {
Arrays.asList(1,2),
Arrays.asList(1,2),
null,
null,
Arrays.asList(5, 6, 7),
};
try (Stream<Pair<Integer, Integer>> res = StreamUtils.leftInnerJoinIterable(a, n -> b[n])) {
final List<Pair<Integer, Integer>> l = res.collect(Collectors.toList());
assertEquals(l, Arrays.asList(
new Pair<>(0, 1),
new Pair<>(0, 2),
new Pair<>(1, 1),
new Pair<>(1, 2),
new Pair<>(4, 5),
new Pair<>(4, 6),
new Pair<>(4, 7)
));
}
}
}