MultiBindingAssertionTest.java

/* 
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 * permit persons to whom the Software  is furnished to do so, subject to
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 * 
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
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package org.slf4j;

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

import junit.framework.TestCase;

public class MultiBindingAssertionTest extends TestCase {

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

  public MultiBindingAssertionTest(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("was expecting NoSuchMethodError");
    } catch (NoSuchMethodError e) {
    }
    List list = sps.stringList;
    assertMsgContains(list, 0, "Class path contains multiple SLF4J bindings.");
    assertMsgContains(list, 1, "Found binding in");
    assertMsgContains(list, 2, "Found binding in");
    assertMsgContains(list, 3, "See http://www.slf4j.org/codes.html");
    assertMsgContains(list, 4,
        "slf4j-api 1.6.x (or later) is incompatible with this binding");
    assertMsgContains(list, 5, "Your binding is version 1.5.5 or earlier.");

  }

  void assertMsgContains(List strList, int index, String msg) {
    assertTrue(((String) strList.get(index)).contains(msg));
  }
}