BasicEtmConfiguratorTest.java

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package etm.core.configuration;

import etm.core.monitor.EtmMonitor;
import etm.core.monitor.EtmPoint;
import etm.core.monitor.FlatMonitor;
import etm.core.monitor.NestedMonitor;
import etm.core.renderer.MeasurementRenderer;
import junit.framework.TestCase;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.lang.reflect.Proxy;
import java.util.Map;

/**
 * Testing basic configurator behavior.
 *
 * @author void.fm
 * @version $Revision$
 */
public class BasicEtmConfiguratorTest extends TestCase {

  public void testNoConfiguration() {
    // capture err, since we expect it here
    PrintStream currentError = System.err;
    try {
      System.setErr(new PrintStream(new ByteArrayOutputStream()));
      EtmManager.reset();

      EtmMonitor etmMonitor = EtmManager.getEtmMonitor();
      assertTrue(Proxy.isProxyClass(etmMonitor.getClass()));

      etmMonitor.start();

      EtmPoint point = etmMonitor.createPoint("testPoint");
      point.collect();

      etmMonitor.render(new MeasurementRenderer() {
        public void render(Map points) {
          assertNotNull(points);
          assertEquals(0, points.size());
        }
      });
      etmMonitor.stop();

    } finally {
      System.setErr(currentError);
    }
  }

  public void testFlatConfiguration() {
    EtmManager.reset();

    BasicEtmConfigurator.configure();
    EtmMonitor etmMonitor = EtmManager.getEtmMonitor();
    assertTrue(etmMonitor instanceof FlatMonitor);

    etmMonitor.start();

    try {
      EtmPoint point = etmMonitor.createPoint("testPoint");
      point.collect();

      etmMonitor.render(new MeasurementRenderer() {
        public void render(Map points) {
          assertNotNull(points);
          assertEquals(1, points.size());
        }
      });
    } finally {
      etmMonitor.stop();
    }


  }

  public void testNestedConfiguration() {
    EtmManager.reset();

    BasicEtmConfigurator.configure(true);
    EtmMonitor etmMonitor = EtmManager.getEtmMonitor();
    assertTrue(etmMonitor instanceof NestedMonitor);

    etmMonitor.start();

    try {
      EtmPoint point = etmMonitor.createPoint("testPoint");
      point.collect();

      etmMonitor.render(new MeasurementRenderer() {
        public void render(Map points) {
          assertNotNull(points);
          assertEquals(1, points.size());
        }
      });
    } finally {
      etmMonitor.stop();
    }


  }


}