/*
 * Copyright (C) 2019, Google LLC.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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package org.eclipse.jgit.transport;

import static org.hamcrest.Matchers.contains;
import static org.junit.Assert.assertThat;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdRef.Unpeeled;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Ref.Storage;
import org.junit.Test;

public class UploadPackRefSortingForReachabilityTest {

	@Test
	public void sortReferences() {
		List<Ref> refs = Stream.of("refs/changes/12/12", "refs/changes/12/1",
				"refs/heads/master", "refs/heads/something",
				"refs/changes/55/1", "refs/tags/v1.1")
				.map(s -> new Unpeeled(Storage.LOOSE, s, ObjectId.zeroId()))
				.collect(Collectors.toList());
		Stream<Ref> sorted = UploadPack.importantRefsFirst(refs);
		List<String> collected = sorted.map(Ref::getName)
				.collect(Collectors.toList());
		assertThat(collected,
				contains("refs/heads/master", "refs/heads/something",
						"refs/tags/v1.1", "refs/changes/12/12",
						"refs/changes/12/1", "refs/changes/55/1"));
	}
}