/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache license, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the license for the specific language governing permissions and
 * limitations under the license.
 */
package org.apache.logging.log4j.core.appender;

import java.util.List;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LoggingException;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.ConfigurationFactory;
import org.apache.logging.log4j.status.StatusLogger;
import org.apache.logging.log4j.test.appender.ListAppender;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import static org.junit.Assert.*;

/**
 *
 */
public class AsyncAppenderTest {
    private static final String CONFIG = "log4j-asynch.xml";
    private static Configuration config;
    private static ListAppender listAppender;
    private static LoggerContext ctx;

    @BeforeClass
    public static void setupClass() {
        System.setProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY, CONFIG);
        ctx = LoggerContext.getContext(false);
        config = ctx.getConfiguration();
        listAppender = (ListAppender) config.getAppender("List");
    }

    @AfterClass
    public static void cleanupClass() {
        System.clearProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY);
        ctx.reconfigure();
        StatusLogger.getLogger().reset();
    }

    @After
    public void after() {
        listAppender.clear();
    }

    @Test
    public void rewriteTest() throws Exception {
        final Logger logger = LogManager.getLogger(AsyncAppender.class);
        logger.error("This is a test");
        logger.warn("Hello world!");
        Thread.sleep(100);
        final List<String> list = listAppender.getMessages();
        assertNotNull("No events generated", list);
        assertTrue("Incorrect number of events. Expected 2, got " + list.size(), list.size() == 2);
        String msg = list.get(0);
        String expected = AsyncAppenderTest.class.getName() + " rewriteTest This is a test";
        assertTrue("Expected " + expected + ", Actual " + msg, expected.equals(msg));
        msg = list.get(1);
        expected = AsyncAppenderTest.class.getName() + " rewriteTest Hello world!";
        assertTrue("Expected " + expected + ", Actual " + msg, expected.equals(msg));
    }

    @Test
    public void testException() throws Exception {
        final Logger logger = LogManager.getLogger(AsyncAppender.class);
        final Exception parent = new IllegalStateException("Test");
        final Throwable child = new LoggingException("This is a test", parent);
        logger.error("This is a test", child);
        Thread.sleep(100);
        final List<String> list = listAppender.getMessages();
        assertNotNull("No events generated", list);
        assertTrue("Incorrect number of events. Expected 1, got " + list.size(), list.size() == 1);
        final String msg = list.get(0);
        assertTrue("No parent exception", msg.contains("java.lang.IllegalStateException"));
    }
}

@@ -866,16 +866,17 @@
 l.List;%0A
+%0A
 import o
@@ -1037,204 +1037,31 @@
 g4j.
-core.LoggerContext;%0Aimport org.apache.logging.log4j.core.config.Configuration;%0Aimport org.apache.logging.log4j.core.config.ConfigurationFactory;%0Aimport org.apache.logging.log4j.status.StatusLogger
+junit.LoggerContextRule
 ;%0Aim
@@ -1159,26 +1159,22 @@
 g.junit.
-AfterClass
+Before
 ;%0Aimport
@@ -1184,27 +1184,25 @@
 g.junit.
-Before
 Class
+Rule
 ;%0Aimport
@@ -1363,266 +1363,92 @@
 l%22;%0A
-    private static Configuration config;%0A    private static ListAppender listAppender;%0A    private static LoggerContext ctx;%0A%0A    @BeforeClass%0A    public static void setupClass() %7B%0A        System.setProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY, 
+%0A    @ClassRule%0A    public static LoggerContextRule context = new LoggerContextRule(
 CONF
@@ -1456,371 +1456,158 @@
 G);%0A
- 
+%0A
     
-   ctx = LoggerContext.getContext(false);%0A        config = ctx.getConfiguration();%0A        listAppender = (ListAppender) config.getAppender(%22List%22);%0A    %7D%0A%0A    @AfterClass%0A    public static void cleanupClass() %7B%0A        System.clearProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY);%0A        ctx.reconfigure();%0A        StatusLogger.getLogger().reset(
+private ListAppender listAppender;%0A%0A    @Before%0A    public void before() throws Exception %7B%0A        listAppender = context.getListAppender(%22List%22
 );%0A 

Use LoggerContextRule to simplify test.