log4j-core/src/test/java/org/apache/logging/log4j/core/pattern/RootThrowableTest.java

/*
 * 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,
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 * See the license for the specific language governing permissions and
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package org.apache.logging.log4j.core.pattern;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.test.junit.LoggerContextSource;
import org.apache.logging.log4j.core.test.junit.Named;
import org.apache.logging.log4j.core.test.appender.ListAppender;
import org.junit.jupiter.api.Test;

import java.util.List;

import static org.junit.jupiter.api.Assertions.*;

@LoggerContextSource("log4j-rootthrowablefilter.xml")
public class RootThrowableTest {
    @Test
    public void testException(final LoggerContext context, @Named("List") final ListAppender app) {
        app.clear();
        final Logger logger = context.getLogger("LoggerTest");
        final Throwable cause = new NullPointerException("null pointer");
        final Throwable parent = new IllegalArgumentException("IllegalArgument", cause);
        logger.error("Exception", parent);
        final List<String> msgs = app.getMessages();
        assertNotNull(msgs);
        assertEquals(1, msgs.size(), "Incorrect number of messages. Should be 1 is " + msgs.size());
        assertTrue(msgs.get(0).contains("suppressed"), "No suppressed lines");
        app.clear();
    }
}