/*
    * Copyright (C) 2010, Mathias Kinzler <mathias.kinzler@sap.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.events;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  
  import org.eclipse.jgit.junit.RepositoryTestCase;
  import org.eclipse.jgit.storage.file.FileBasedConfig;
  import org.junit.Test;
  
  public class ConfigChangeEventTest extends RepositoryTestCase {
  	@Test
  	public void testFileRepository_ChangeEventsOnlyOnSave() throws Exception {
  		final ConfigChangedEvent[] events = new ConfigChangedEvent[1];
  		db.getListenerList()
  				.addConfigChangedListener((ConfigChangedEvent event) -> {
  					events[0] = event;
  				});
  		FileBasedConfig config = db.getConfig();
  		assertNull(events[0]);
  
  		// set a value to some arbitrary key
  		config.setString("test", "section", "event", "value");
  		// no changes until we save
  		assertNull(events[0]);
  		config.save();
  		assertNotNull(events[0]);
  		// correct repository?
  		assertEquals(events[0].getRepository(), db);
  
  		// reset for the next test
  		events[0] = null;
  
  		// unset the value we have just set above
  		config.unset("test", "section", "event");
  		// no changes until we save
  		assertNull(events[0]);
  		config.save();
  		assertNotNull(events[0]);
  		// correct repository?
  		assertEquals(events[0].getRepository(), db);
  	}
  }