| /* |
| * Copyright (C) 2011, 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.lib; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class ObjectIdSubclassMapTest { |
| private MutableObjectId idBuf; |
| |
| private SubId id_1, id_2, id_3, id_a31, id_b31; |
| |
| @Before |
| public void init() { |
| idBuf = new MutableObjectId(); |
| id_1 = new SubId(id(1)); |
| id_2 = new SubId(id(2)); |
| id_3 = new SubId(id(3)); |
| id_a31 = new SubId(id(31)); |
| id_b31 = new SubId(id((1 << 8) + 31)); |
| } |
| |
| @Test |
| public void testEmptyMap() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| assertTrue(m.isEmpty()); |
| assertEquals(0, m.size()); |
| |
| Iterator<SubId> i = m.iterator(); |
| assertNotNull(i); |
| assertFalse(i.hasNext()); |
| |
| assertFalse(m.contains(id(1))); |
| } |
| |
| @Test |
| public void testAddGetAndContains() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| m.add(id_1); |
| m.add(id_2); |
| m.add(id_3); |
| m.add(id_a31); |
| m.add(id_b31); |
| assertFalse(m.isEmpty()); |
| assertEquals(5, m.size()); |
| |
| assertSame(id_1, m.get(id_1)); |
| assertSame(id_1, m.get(id(1))); |
| assertSame(id_1, m.get(id(1).copy())); |
| assertSame(id_2, m.get(id(2).copy())); |
| assertSame(id_3, m.get(id(3).copy())); |
| assertSame(id_a31, m.get(id(31).copy())); |
| assertSame(id_b31, m.get(id_b31.copy())); |
| |
| assertTrue(m.contains(id_1)); |
| } |
| |
| @Test |
| public void testClear() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| |
| m.add(id_1); |
| assertSame(id_1, m.get(id_1)); |
| |
| m.clear(); |
| assertTrue(m.isEmpty()); |
| assertEquals(0, m.size()); |
| |
| Iterator<SubId> i = m.iterator(); |
| assertNotNull(i); |
| assertFalse(i.hasNext()); |
| |
| assertFalse(m.contains(id(1))); |
| } |
| |
| @Test |
| public void testAddIfAbsent() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| m.add(id_1); |
| |
| assertSame(id_1, m.addIfAbsent(new SubId(id_1))); |
| assertEquals(1, m.size()); |
| |
| assertSame(id_2, m.addIfAbsent(id_2)); |
| assertEquals(2, m.size()); |
| assertSame(id_a31, m.addIfAbsent(id_a31)); |
| assertSame(id_b31, m.addIfAbsent(id_b31)); |
| |
| assertSame(id_a31, m.addIfAbsent(new SubId(id_a31))); |
| assertSame(id_b31, m.addIfAbsent(new SubId(id_b31))); |
| assertEquals(4, m.size()); |
| } |
| |
| @Test |
| public void testAddGrowsWithObjects() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| m.add(id_1); |
| for (int i = 32; i < 8000; i++) |
| m.add(new SubId(id(i))); |
| assertEquals(8000 - 32 + 1, m.size()); |
| |
| assertSame(id_1, m.get(id_1.copy())); |
| for (int i = 32; i < 8000; i++) |
| assertTrue(m.contains(id(i))); |
| } |
| |
| @Test |
| public void testAddIfAbsentGrowsWithObjects() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| m.add(id_1); |
| for (int i = 32; i < 8000; i++) |
| m.addIfAbsent(new SubId(id(i))); |
| assertEquals(8000 - 32 + 1, m.size()); |
| |
| assertSame(id_1, m.get(id_1.copy())); |
| for (int i = 32; i < 8000; i++) |
| assertTrue(m.contains(id(i))); |
| } |
| |
| @Test |
| public void testIterator() { |
| ObjectIdSubclassMap<SubId> m = new ObjectIdSubclassMap<>(); |
| m.add(id_1); |
| m.add(id_2); |
| m.add(id_3); |
| |
| Iterator<SubId> i = m.iterator(); |
| assertTrue(i.hasNext()); |
| assertSame(id_1, i.next()); |
| assertTrue(i.hasNext()); |
| assertSame(id_2, i.next()); |
| assertTrue(i.hasNext()); |
| assertSame(id_3, i.next()); |
| |
| assertFalse(i.hasNext()); |
| try { |
| i.next(); |
| fail("did not fail on next with no next"); |
| } catch (NoSuchElementException expected) { |
| // OK |
| } |
| |
| i = m.iterator(); |
| assertSame(id_1, i.next()); |
| try { |
| i.remove(); |
| fail("did not fail on remove"); |
| } catch (UnsupportedOperationException expected) { |
| // OK |
| } |
| } |
| |
| private AnyObjectId id(int val) { |
| // Using bytes 2 and 3 positions our value at the low end of idBuf.w1, |
| // which is what ObjectIdSubclassMap uses for hashing. This makes |
| // collisions likely, making collision testing easier. |
| |
| val <<= 1; |
| |
| idBuf.setByte(2, (val >>> 8) & 0xff); |
| idBuf.setByte(3, val & 0xff); |
| return idBuf; |
| } |
| |
| private static class SubId extends ObjectId { |
| SubId(AnyObjectId id) { |
| super(id); |
| } |
| } |
| } |