it.unimi.dsi.fastutil.ints.IntLinkedOpenCustomHashSetTest Maven / Gradle / Ivy

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package it.unimi.dsi.fastutil.ints;

import static org.junit.Assert.*;

import org.junit.Test;

public class IntLinkedOpenCustomHashSetTest {

	@Test
	public void testGetNullKey() {
		final IntLinkedOpenCustomHashSet s = new IntLinkedOpenCustomHashSet(new IntHash.Strategy() {

			@Override
			public int hashCode(int o) {
				return o % 10;
			}

			@Override
			public boolean equals(int a, int b) {
				return (a - b) % 10 == 0;
			}
		});

		s.add(3);
		s.add(10);
		s.add(0);
		assertTrue(s.contains(0));
		assertTrue(s.contains(10));
		assertTrue(s.contains(3));
		assertFalse(s.contains(1));
		IntListIterator i = s.iterator();
		assertEquals(3, i.nextInt());
		assertEquals(10, i.nextInt());
		assertFalse(i.hasNext());

		s.remove(0);
		assertFalse(s.contains(0));
		assertFalse(s.contains(10));
		s.add(10);

		i = s.iterator();
		assertEquals(3, i.nextInt());
		assertEquals(10, i.nextInt());
		assertFalse(i.hasNext());

	}
}