CheckMonitorWarningsTest.java

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 *
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package etm.core.monitor;

import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.MatcherAssert.assertThat;

import junit.framework.TestCase;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.nio.charset.Charset;

import etm.core.configuration.EtmManager;

/**
 *
 * Runs tests whether certain warnings are shown or not.
 *
 * @author void.fm
 * @version $Revision$
 */
public class CheckMonitorWarningsTest extends TestCase {

  public void testEtmMonitorSupportWarning() throws Exception {
    EtmManager.reset();

    PrintStream outWriter = System.out;
    PrintStream errorWriter = System.err;

    try {
      System.setProperty("etm.core.util.jdk.logging.disabled", "true");

      ByteArrayOutputStream out = new ByteArrayOutputStream();
      PrintStream tmp = new PrintStream(out);
      System.setOut(tmp);
      System.setErr(tmp);


      EtmMonitor etmMonitor = EtmManager.getEtmMonitor();
      EtmPoint point = etmMonitor.createPoint("test");
      point.collect();

      tmp.flush();
      String s = new String(out.toByteArray(), Charset.defaultCharset().name());

      assertThat (s, containsString("Warning - Performance Monitoring currently disabled."));


    } finally {
      System.setProperty("etm.core.util.jdk.logging.disabled", "false");

      System.setOut(outWriter);
      System.setErr(errorWriter);
    }
  }

  public void testNullMonitorWarning() throws Exception {
    EtmManager.reset();

    PrintStream outWriter = System.out;
    PrintStream errorWriter = System.err;

    try {
      System.setProperty("etm.core.util.jdk.logging.disabled", "true");

      ByteArrayOutputStream out = new ByteArrayOutputStream();
      PrintStream tmp = new PrintStream(out);
      System.setOut(tmp);
      System.setErr(tmp);

      EtmMonitor etmMonitor = EtmManager.getEtmMonitor();
      etmMonitor.start();
      EtmPoint point = etmMonitor.createPoint("test");
      point.collect();

      tmp.flush();
      String s = new String(out.toByteArray(), Charset.defaultCharset().name());
      etmMonitor.stop();

      assertThat (s, containsString("Warning - NullMonitor active. Performance results are discarded."));


    } finally {
      System.setProperty("etm.core.util.jdk.logging.disabled", "false");
      System.setOut(outWriter);
      System.setErr(errorWriter);
    }
  }

}