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1   /**
2    * Copyright (c) 2004-2011 QOS.ch
3    * All rights reserved.
4    *
5    * Permission is hereby granted, free  of charge, to any person obtaining
6    * a  copy  of this  software  and  associated  documentation files  (the
7    * "Software"), to  deal in  the Software without  restriction, including
8    * without limitation  the rights to  use, copy, modify,  merge, publish,
9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10   * permit persons to whom the Software  is furnished to do so, subject to
11   * the following conditions:
12   *
13   * The  above  copyright  notice  and  this permission  notice  shall  be
14   * included in all copies or substantial portions of the Software.
15   *
16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   *
24   */
25  package org.slf4j.dummyExt;
26  
27  import static org.junit.Assert.assertEquals;
28  
29  import org.junit.Test;
30  import org.slf4j.MDC;
31  import org.slf4j.ext.MDCStrLookup;
32  
33  public class MDCStrLookupTest {
34  
35      @Test
36      public void testLookup() throws Exception {
37          MDC.put("key", "value");
38          MDC.put("number", "2");
39          MDCStrLookup lookup = new MDCStrLookup();
40          assertEquals("value", lookup.lookup("key"));
41          assertEquals("2", lookup.lookup("number"));
42          assertEquals(null, lookup.lookup(null));
43          assertEquals(null, lookup.lookup(""));
44          assertEquals(null, lookup.lookup("other"));
45      }
46  }