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package it.unimi.dsi.fastutil.ints;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.Collections;

import org.junit.Test;

public class IntArrayListTest {

	@Test
	public void testEmptyListIsDifferentFromEmptySet() {
		assertFalse(IntLists.EMPTY_LIST.equals(IntSets.EMPTY_SET));
		assertFalse(IntSets.EMPTY_SET.equals(IntLists.EMPTY_LIST));
	}

	@SuppressWarnings("deprecation")
	@Test
	public void testNullInContains() {
		assertFalse(new IntArrayList().contains(null));
	}

	@Test
	public void testAddUsingIteratorToTheFirstPosition() {
		IntArrayList list = new IntArrayList();
		list.add(24);
		IntListIterator it = list.listIterator();
		it.add(42);
		assertTrue(it.hasNext());
		assertEquals(IntArrayList.wrap(new int[] { 42, 24 }), list);
	}

	@Test
	public void testRemoveAll() {
		IntArrayList l = IntArrayList.wrap(new int[] { 0, 1, 1, 2 });
		l.removeAll(IntSets.singleton(1));
		assertEquals(IntArrayList.wrap(new int[] { 0, 2 }), l);

		l = IntArrayList.wrap(new int[] { 0, 1, 1, 2 });
		l.removeAll(Collections.singleton(Integer.valueOf(1)));
		assertEquals(IntArrayList.wrap(new int[] { 0, 2 }), l);
	}
}