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/*
 * Copyright (C) 2009, Christian Halstrick <christian.halstrick@sap.com>
 * Copyright (C) 2009, Christian Halstrick, Matthias Sohn, SAP AG
 * Copyright (C) 2009-2010, 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.lib;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.IOException;

import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.storage.file.FileBasedConfig;
import org.junit.Test;

public class ReflogConfigTest extends RepositoryTestCase {
	@Test
	public void testlogAllRefUpdates() throws Exception {
		long commitTime = 1154236443000L;
		int tz = -4 * 60;

		// check that there are no entries in the reflog and turn off writing
		// reflogs
		assertTrue(db.getReflogReader(Constants.HEAD).getReverseEntries()
				.isEmpty());
		final FileBasedConfig cfg = db.getConfig();
		cfg.setBoolean("core", null, "logallrefupdates", false);
		cfg.save();

		// do one commit and check that reflog size is 0: no reflogs should be
		// written
		commit("A Commit\n", commitTime, tz);
		commitTime += 60 * 1000;
		assertTrue("Reflog for HEAD still contain no entry", db
				.getReflogReader(Constants.HEAD).getReverseEntries().isEmpty());

		// set the logAllRefUpdates parameter to true and check it
		cfg.setBoolean("core", null, "logallrefupdates", true);
		cfg.save();
		assertEquals(CoreConfig.LogRefUpdates.TRUE,
				cfg.getEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
						ConfigConstants.CONFIG_KEY_LOGALLREFUPDATES,
						CoreConfig.LogRefUpdates.FALSE));

		// do one commit and check that reflog size is increased to 1
		commit("A Commit\n", commitTime, tz);
		commitTime += 60 * 1000;
		assertTrue(
				"Reflog for HEAD should contain one entry",
				db.getReflogReader(Constants.HEAD).getReverseEntries().size() == 1);

		// set the logAllRefUpdates parameter to false and check it
		cfg.setBoolean("core", null, "logallrefupdates", false);
		cfg.save();
		assertEquals(CoreConfig.LogRefUpdates.FALSE,
				cfg.getEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
						ConfigConstants.CONFIG_KEY_LOGALLREFUPDATES,
						CoreConfig.LogRefUpdates.TRUE));

		// do one commit and check that reflog size is 2
		commit("A Commit\n", commitTime, tz);
		commitTime += 60 * 1000;
		assertTrue(
				"Reflog for HEAD should contain two entries",
				db.getReflogReader(Constants.HEAD).getReverseEntries().size() == 2);

		// set the logAllRefUpdates parameter to false and check it
		cfg.setEnum("core", null, "logallrefupdates",
				CoreConfig.LogRefUpdates.ALWAYS);
		cfg.save();
		assertEquals(CoreConfig.LogRefUpdates.ALWAYS,
				cfg.getEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
						ConfigConstants.CONFIG_KEY_LOGALLREFUPDATES,
						CoreConfig.LogRefUpdates.FALSE));

		// do one commit and check that reflog size is 3
		commit("A Commit\n", commitTime, tz);
		assertTrue("Reflog for HEAD should contain three entries",
				db.getReflogReader(Constants.HEAD).getReverseEntries()
						.size() == 3);
	}

	private void commit(String commitMsg, long commitTime, int tz)
			throws IOException {
		final CommitBuilder commit = new CommitBuilder();
		commit.setAuthor(new PersonIdent(author, commitTime, tz));
		commit.setCommitter(new PersonIdent(committer, commitTime, tz));
		commit.setMessage(commitMsg);
		ObjectId id;
		try (ObjectInserter inserter = db.newObjectInserter()) {
			commit.setTreeId(inserter.insert(new TreeFormatter()));
			id = inserter.insert(commit);
			inserter.flush();
		}

		int nl = commitMsg.indexOf('\n');
		final RefUpdate ru = db.updateRef(Constants.HEAD);
		ru.setNewObjectId(id);
		ru.setRefLogMessage("commit : "
				+ ((nl == -1) ? commitMsg : commitMsg.substring(0, nl)), false);
		ru.forceUpdate();
	}
}