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/*
* 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 ObjectIdOwnerMapTest {
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() {
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
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() {
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
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() {
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
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() {
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
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() {
int n = 16384;
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
m.add(id_1);
for (int i = 32; i < n; i++)
m.add(new SubId(id(i)));
assertEquals(n - 32 + 1, m.size());
assertSame(id_1, m.get(id_1.copy()));
for (int i = 32; i < n; i++)
assertTrue(m.contains(id(i)));
}
@Test
public void testAddIfAbsentGrowsWithObjects() {
int n = 16384;
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
m.add(id_1);
for (int i = 32; i < n; i++)
m.addIfAbsent(new SubId(id(i)));
assertEquals(n - 32 + 1, m.size());
assertSame(id_1, m.get(id_1.copy()));
for (int i = 32; i < n; i++)
assertTrue(m.contains(id(i)));
}
@Test
public void testIterator() {
ObjectIdOwnerMap<SubId> m = new ObjectIdOwnerMap<>();
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) {
idBuf.setByte(0, val & 0xff);
idBuf.setByte(3, (val >>> 8) & 0xff);
return idBuf;
}
private static class SubId extends ObjectIdOwnerMap.Entry {
SubId(AnyObjectId id) {
super(id);
}
}
}
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