/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.sift;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;

import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.testUtil.RandomUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import org.slf4j.MDC;

import java.util.HashMap;

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

/**
 * @author Ceki Gülcü
 */
public class MDCBasedDiscriminatorTest {

    static String DEFAULT_VAL = "DEFAULT_VAL";

    MDCBasedDiscriminator discriminator = new MDCBasedDiscriminator();
    LoggerContext context = new LoggerContext();
    Logger logger = context.getLogger(this.getClass());

    int diff = RandomUtil.getPositiveInt();
    String key = "MDCBasedDiscriminatorTest_key" + diff;
    String value = "MDCBasedDiscriminatorTest_val" + diff;
    LoggingEvent event;

    @Before
    public void setUp() {
        MDC.clear();
        discriminator.setContext(context);
        discriminator.setKey(key);
        discriminator.setDefaultValue(DEFAULT_VAL);
        discriminator.start();
        assertTrue(discriminator.isStarted());
    }

    @After
    public void teaDown() {
        MDC.clear();
    }

    @Test
    public void smoke() {
        MDC.put(key, value);
        event = new LoggingEvent("a", logger, Level.DEBUG, "", null, null);

        String discriminatorValue = discriminator.getDiscriminatingValue(event);
        assertEquals(value, discriminatorValue);
    }

    @Test
    public void nullMDC() {
        event = new LoggingEvent("a", logger, Level.DEBUG, "", null, null);
        assertEquals(new HashMap(), event.getMDCPropertyMap());
        String discriminatorValue = discriminator.getDiscriminatingValue(event);
        assertEquals(DEFAULT_VAL, discriminatorValue);
    }
}