/*
    * Copyright (C) 2011, Tomasz Zarna <Tomasz.Zarna@pl.ibm.com> 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.revwalk;
  
  import static org.junit.Assert.assertNull;
  
  import org.eclipse.jgit.revwalk.filter.SkipRevFilter;
  import org.junit.Test;
  
  public class SkipRevFilterTest extends RevWalkTestCase {
  	@Test
  	public void testSkipRevFilter() throws Exception {
  		final RevCommit a = commit();
  		final RevCommit b1 = commit(a);
  		final RevCommit b2 = commit(a);
  		final RevCommit c = commit(b1, b2);
  		final RevCommit d = commit(c);
  
  		rw.reset();
  		rw.setRevFilter(SkipRevFilter.create(3));
  		markStart(d);
  		assertCommit(b1, rw.next());
  		assertCommit(a, rw.next());
  		assertNull(rw.next());
  	}
  
  	@Test
  	public void testSkipRevFilter0() throws Exception {
  		final RevCommit a = commit();
  		final RevCommit b = commit(a);
  
  		rw.reset();
  		rw.setRevFilter(SkipRevFilter.create(0));
  		markStart(b);
  		assertCommit(b, rw.next());
  		assertCommit(a, rw.next());
  		assertNull(rw.next());
  	}
  
  	@Test(expected = IllegalArgumentException.class)
  	public void testSkipRevFilterNegative() throws Exception {
  		SkipRevFilter.create(-1);
  	}
  }