/*
    * Copyright (C) 2021, kylezhao <kylezhao@tencent.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.pgm;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.lib.CLIRepositoryTestCase;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.junit.Before;
  import org.junit.Test;
  
  public class RevListTest extends CLIRepositoryTestCase {
  
  	private Git git;
  
  	@Override
  	@Before
  	public void setUp() throws Exception {
  		super.setUp();
  		git = new Git(db);
  	}
  
  	@Test
  	public void testWithParentsFlag() throws Exception {
  		List<RevCommit> commits = createCommitsForParentsFlag(git);
  		String result = toString(
  				execute("git rev-list HEAD --parents -- Test.txt"));
  
  		String expect = toString(
  				commits.get(3).name() + ' ' + commits.get(1).name(),
  				commits.get(1).name());
  
  		assertEquals(expect, result);
  	}
  
  	@Test
  	public void testWithoutParentsFlag() throws Exception {
  		List<RevCommit> commits = createCommitsForParentsFlag(git);
  		String result = toString(execute("git rev-list HEAD -- Test.txt"));
  
  		String expect = toString(commits.get(3).name(), commits.get(1).name());
  
  		assertEquals(expect, result);
  	}
  
  	private List<RevCommit> createCommitsForParentsFlag(Git repo)
  			throws Exception {
  		List<RevCommit> commits = new ArrayList<>();
  		writeTrashFile("Test1.txt", "Hello world");
  		repo.add().addFilepattern("Test1.txt").call();
  		commits.add(repo.commit().setMessage("commit#0").call());
  		writeTrashFile("Test.txt", "Hello world!");
  		repo.add().addFilepattern("Test.txt").call();
  		commits.add(repo.commit().setMessage("commit#1").call());
  		writeTrashFile("Test1.txt", "Hello world!!");
  		repo.add().addFilepattern("Test1.txt").call();
  		commits.add(repo.commit().setMessage("commit#2").call());
  		writeTrashFile("Test.txt", "Hello world!!!");
  		repo.add().addFilepattern("Test.txt").call();
  		commits.add(repo.commit().setMessage("commit#3").call());
  		return commits;
  	}
  }