/*
 * Copyright (C) 2011, GitHub Inc.
 * 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
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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package org.eclipse.jgit.lib;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.errors.RevisionSyntaxException;
import org.eclipse.jgit.revwalk.RevCommit;
import org.junit.Test;

/**
 * Unit tests for resolving reflog-based revisions
 */
public class ReflogResolveTest extends RepositoryTestCase {

	@Test
	public void resolveMasterCommits() throws Exception {
		Git git = new Git(db);
		writeTrashFile("file.txt", "content");
		git.add().addFilepattern("file.txt").call();
		RevCommit c1 = git.commit().setMessage("create file").call();
		writeTrashFile("file.txt", "content2");
		git.add().addFilepattern("file.txt").call();
		RevCommit c2 = git.commit().setMessage("edit file").call();

		assertEquals(c2, db.resolve("master@{0}"));
		assertEquals(c1, db.resolve("master@{1}"));
	}

	@Test
	public void resolveReflogParent() throws Exception {
		Git git = new Git(db);
		writeTrashFile("file.txt", "content");
		git.add().addFilepattern("file.txt").call();
		RevCommit c1 = git.commit().setMessage("create file").call();
		writeTrashFile("file.txt", "content2");
		git.add().addFilepattern("file.txt").call();
		git.commit().setMessage("edit file").call();

		assertEquals(c1, db.resolve("master@{0}~1"));
	}

	@Test
	public void resolveNonExistingBranch() throws Exception {
		Git git = new Git(db);
		writeTrashFile("file.txt", "content");
		git.add().addFilepattern("file.txt").call();
		git.commit().setMessage("create file").call();
		assertNull(db.resolve("notabranch@{7}"));
	}

	@Test
	public void resolveNegativeEntryNumber() throws Exception {
		Git git = new Git(db);
		writeTrashFile("file.txt", "content");
		git.add().addFilepattern("file.txt").call();
		git.commit().setMessage("create file").call();
		try {
			db.resolve("master@{-12}");
			fail("Exception not thrown");
		} catch (RevisionSyntaxException e) {
			assertNotNull(e);
		}
	}

	@Test
	public void resolveDate() throws Exception {
		Git git = new Git(db);
		writeTrashFile("file.txt", "content");
		git.add().addFilepattern("file.txt").call();
		git.commit().setMessage("create file").call();
		try {
			db.resolve("master@{yesterday}");
			fail("Exception not thrown");
		} catch (RevisionSyntaxException e) {
			assertNotNull(e);
		}
	}
}