| /* |
| * Copyright (C) 2009, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class LongMapTest { |
| private LongMap<Long> map; |
| |
| @Before |
| public void setUp() throws Exception { |
| map = new LongMap<>(); |
| } |
| |
| @Test |
| public void testEmptyMap() { |
| assertFalse(map.containsKey(0)); |
| assertFalse(map.containsKey(1)); |
| |
| assertNull(map.get(0)); |
| assertNull(map.get(1)); |
| |
| assertNull(map.remove(0)); |
| assertNull(map.remove(1)); |
| } |
| |
| @Test |
| public void testInsertMinValue() { |
| final Long min = Long.valueOf(Long.MIN_VALUE); |
| assertNull(map.put(Long.MIN_VALUE, min)); |
| assertTrue(map.containsKey(Long.MIN_VALUE)); |
| assertSame(min, map.get(Long.MIN_VALUE)); |
| assertFalse(map.containsKey(Integer.MIN_VALUE)); |
| } |
| |
| @Test |
| public void testReplaceMaxValue() { |
| final Long min = Long.valueOf(Long.MAX_VALUE); |
| final Long one = Long.valueOf(1); |
| assertNull(map.put(Long.MAX_VALUE, min)); |
| assertSame(min, map.get(Long.MAX_VALUE)); |
| assertSame(min, map.put(Long.MAX_VALUE, one)); |
| assertSame(one, map.get(Long.MAX_VALUE)); |
| } |
| |
| @Test |
| public void testRemoveOne() { |
| final long start = 1; |
| assertNull(map.put(start, Long.valueOf(start))); |
| assertEquals(Long.valueOf(start), map.remove(start)); |
| assertFalse(map.containsKey(start)); |
| } |
| |
| @Test |
| public void testRemoveCollision1() { |
| // This test relies upon the fact that we always >>> 1 the value |
| // to derive an unsigned hash code. Thus, 0 and 1 fall into the |
| // same hash bucket. Further it relies on the fact that we add |
| // the 2nd put at the top of the chain, so removing the 1st will |
| // cause a different code path. |
| // |
| assertNull(map.put(0, Long.valueOf(0))); |
| assertNull(map.put(1, Long.valueOf(1))); |
| assertEquals(Long.valueOf(0), map.remove(0)); |
| |
| assertFalse(map.containsKey(0)); |
| assertTrue(map.containsKey(1)); |
| } |
| |
| @Test |
| public void testRemoveCollision2() { |
| // This test relies upon the fact that we always >>> 1 the value |
| // to derive an unsigned hash code. Thus, 0 and 1 fall into the |
| // same hash bucket. Further it relies on the fact that we add |
| // the 2nd put at the top of the chain, so removing the 2nd will |
| // cause a different code path. |
| // |
| assertNull(map.put(0, Long.valueOf(0))); |
| assertNull(map.put(1, Long.valueOf(1))); |
| assertEquals(Long.valueOf(1), map.remove(1)); |
| |
| assertTrue(map.containsKey(0)); |
| assertFalse(map.containsKey(1)); |
| } |
| |
| @Test |
| public void testSmallMap() { |
| final long start = 12; |
| final long n = 8; |
| for (long i = start; i < start + n; i++) |
| assertNull(map.put(i, Long.valueOf(i))); |
| for (long i = start; i < start + n; i++) |
| assertEquals(Long.valueOf(i), map.get(i)); |
| } |
| |
| @Test |
| public void testLargeMap() { |
| final long start = Integer.MAX_VALUE; |
| final long n = 100000; |
| for (long i = start; i < start + n; i++) |
| assertNull(map.put(i, Long.valueOf(i))); |
| for (long i = start; i < start + n; i++) |
| assertEquals(Long.valueOf(i), map.get(i)); |
| } |
| } |