/*******************************************************************************
* Copyright 2014 Analog Devices, Inc.
*
* 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 com.analog.lyric.collect.tests;
import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.TreeSet;
import org.junit.Test;
import com.analog.lyric.collect.Comparators;
import org.eclipse.jdt.annotation.NonNullByDefault;
public class TestComparators
{
@Test
public void test()
{
//
// Test Comparators.fromCollection
//
assertNull(Comparators.fromCollection(new ArrayList<Object>()));
assertNull(Comparators.fromCollection(new TreeSet<Integer>()));
Comparator<? super Integer> comparator = new Comparator<Integer>() {
@Override
@NonNullByDefault(false)
public int compare(Integer arg0, Integer arg1)
{
return arg1.compareTo(arg0);
}
};
TreeSet<Integer> set = new TreeSet<Integer>(comparator);
assertSame(comparator, Comparators.fromCollection(set));
//
// Test Comparators.lexicalIntArray
//
Comparator<int[]> lexical = Comparators.lexicalIntArray();
assertTrue(lexical.compare(new int[] {1,2,3}, new int[] {1,3,2}) < 0);
assertTrue(lexical.compare(new int[] {1,3,2}, new int[] {1,2,3}) > 0);
assertEquals(0, lexical.compare(new int[] {1,2,3,4}, new int[] {1,2,3,4}));
assertTrue(lexical.compare(new int[] {4,3,2}, new int[] {20, 1}) > 0);
//
// Test Comparators.reverseLexicalIntArray
//
Comparator<int[]> rlexical = Comparators.reverseLexicalIntArray();
assertTrue(rlexical.compare(new int[] {1,2,3}, new int[] {1,3,2}) > 0);
assertTrue(rlexical.compare(new int[] {1,3,2}, new int[] {1,2,3}) < 0);
assertEquals(0, rlexical.compare(new int[] {1,2,3,4}, new int[] {1,2,3,4}));
assertTrue(rlexical.compare(new int[] {4,3,2}, new int[] {20, 1}) > 0);
}
}