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/*
* Copyright (C) 2017-2022 Sebastiano Vigna
*
* 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 it.unimi.dsi.fastutil.ints;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import it.unimi.dsi.fastutil.MainRunner;
public class IntSetsTest {
@Test
public void testToArrayShouldNullElementAfterLastEntry() {
final IntSet set = IntSets.EMPTY_SET;
final Object[] values = new Object[] { "test" };
set.toArray(values);
assertNull(values[0]);
}
@Test
public void testFromTo() {
final IntSet s = IntSets.fromTo(0, 1000);
assertEquals(1000, s.size());
assertTrue(s.contains(0));
assertTrue(s.contains(999));
assertFalse(s.contains(-1));
assertFalse(s.contains(1000));
assertEquals(1000, new IntOpenHashSet(s.iterator()).size());
}
@Test
public void testTo() {
IntSet s = IntSets.to(0);
assertEquals(Integer.MAX_VALUE, s.size());
assertTrue(s.contains(-1));
assertTrue(s.contains(Integer.MIN_VALUE));
assertFalse(s.contains(0));
s = IntSets.to(Integer.MIN_VALUE + 1000);
final IntIterator iterator = s.iterator();
assertEquals(Integer.MIN_VALUE, iterator.nextInt());
for (int i = 0; i < 998; i++) iterator.nextInt();
assertEquals(Integer.MIN_VALUE + 999, iterator.nextInt());
assertFalse(iterator.hasNext());
s = IntSets.to(-2);
assertEquals(Integer.MAX_VALUE - 1, s.size());
}
@Test
public void testFrom() {
IntSet s = IntSets.from(0);
assertEquals(Integer.MAX_VALUE, s.size());
assertFalse(s.contains(-1));
assertTrue(s.contains(Integer.MAX_VALUE));
assertTrue(s.contains(0));
s = IntSets.from(Integer.MAX_VALUE - 1000);
final IntIterator iterator = s.iterator();
assertEquals(Integer.MAX_VALUE - 1000, iterator.nextInt());
for (int i = 0; i < 999; i++) iterator.nextInt();
assertEquals(Integer.MAX_VALUE, iterator.nextInt());
assertFalse(iterator.hasNext());
s = IntSets.from(2);
assertEquals(Integer.MAX_VALUE - 1, s.size());
}
@Test
public void testLegacyMainMethodTests() throws Exception {
MainRunner.callMainIfExists(IntSets.class, "int", /*seed=*/"928374");
}
}
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