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/*
* Copyright (C) 2008, 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.treewalk;
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 org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectReader;
import org.junit.Test;
public class EmptyTreeIteratorTest extends RepositoryTestCase {
@Test
public void testAtEOF() throws Exception {
final EmptyTreeIterator etp = new EmptyTreeIterator();
assertTrue(etp.first());
assertTrue(etp.eof());
}
@Test
public void testCreateSubtreeIterator() throws Exception {
final EmptyTreeIterator etp = new EmptyTreeIterator();
try (ObjectReader reader = db.newObjectReader()) {
final AbstractTreeIterator sub = etp.createSubtreeIterator(reader);
assertNotNull(sub);
assertTrue(sub.first());
assertTrue(sub.eof());
assertTrue(sub instanceof EmptyTreeIterator);
}
}
@Test
public void testEntryObjectId() throws Exception {
final EmptyTreeIterator etp = new EmptyTreeIterator();
assertSame(ObjectId.zeroId(), etp.getEntryObjectId());
assertNotNull(etp.idBuffer());
assertEquals(0, etp.idOffset());
assertEquals(ObjectId.zeroId(), ObjectId.fromRaw(etp.idBuffer()));
}
@Test
public void testNextDoesNothing() throws Exception {
final EmptyTreeIterator etp = new EmptyTreeIterator();
etp.next(1);
assertTrue(etp.first());
assertTrue(etp.eof());
assertEquals(ObjectId.zeroId(), ObjectId.fromRaw(etp.idBuffer()));
etp.next(1);
assertTrue(etp.first());
assertTrue(etp.eof());
assertEquals(ObjectId.zeroId(), ObjectId.fromRaw(etp.idBuffer()));
}
@Test
public void testBackDoesNothing() throws Exception {
final EmptyTreeIterator etp = new EmptyTreeIterator();
etp.back(1);
assertTrue(etp.first());
assertTrue(etp.eof());
assertEquals(ObjectId.zeroId(), ObjectId.fromRaw(etp.idBuffer()));
etp.back(1);
assertTrue(etp.first());
assertTrue(etp.eof());
assertEquals(ObjectId.zeroId(), ObjectId.fromRaw(etp.idBuffer()));
}
@Test
public void testStopWalkCallsParent() throws Exception {
final boolean called[] = new boolean[1];
assertFalse(called[0]);
final EmptyTreeIterator parent = new EmptyTreeIterator() {
@Override
public void stopWalk() {
called[0] = true;
}
};
try (ObjectReader reader = db.newObjectReader()) {
parent.createSubtreeIterator(reader).stopWalk();
}
assertTrue(called[0]);
}
}
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