MissingSingletonMethodAssertionTest.java

/* 
 * Copyright (c) 2004-2009 QOS.ch
 * All rights reserved.
 * 
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 * a  copy  of this  software  and  associated  documentation files  (the
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 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 * 
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 * 
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
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package org.slf4j;

import java.io.PrintStream;
import java.util.Random;

import junit.framework.TestCase;

public class MissingSingletonMethodAssertionTest extends TestCase {

  StringPrintStream sps = new StringPrintStream(System.err);
  PrintStream old = System.err;
  int diff = 1024 + new Random().nextInt(10000);

  public MissingSingletonMethodAssertionTest(String name) {
    super(name);
  }

  protected void setUp() throws Exception {
    super.setUp();
    System.setErr(sps);
  }

  protected void tearDown() throws Exception {
    super.tearDown();
    System.setErr(old);
  }

  public void test() throws Exception {
    try {
      Logger logger = LoggerFactory.getLogger(this.getClass());
      String msg = "hello world " + diff;
      logger.info(msg);
      fail("NoSuchMethodError expected");
    } catch (NoSuchMethodError e) {
    }
    
    int lineCount = sps.stringList
    .size();
    assertTrue("number of lines should be 3 but was "+lineCount, lineCount == 3);

    
    // expected output:
    // SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding.
    // SLF4J: Your binding is version 1.4.x or earlier.
    // SLF4J: Upgrade your binding to version 1.6.x. or 2.0.x

    {
      String s = (String) sps.stringList.get(0);
      assertTrue(s
          .contains("SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding."));
    }
    {
      String s = (String) sps.stringList.get(1);
      assertTrue(s.contains("SLF4J: Your binding is version 1.5.5 or earlier."));
    }
    {
      String s = (String) sps.stringList.get(2);
      assertTrue(s
          .contains("SLF4J: Upgrade your binding to version 1.6.x. or 2.0.x"));
    }

  }
}