SWTBot中junit4通知RunNotifier的使用

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             在junit4中的监听接口为RunnerListener，具体的实现为：

 

package org.junit.runner.notification;

import org.junit.runner.Description;
import org.junit.runner.Result;

public class RunListener {
	public void testRunStarted(Description description) throws Exception {
	}

	public void testRunFinished(Result result) throws Exception {
	}

	public void testStarted(Description description) throws Exception {
	}

	public void testFinished(Description description) throws Exception {
	}

	public void testFailure(Failure failure) throws Exception {
	}

	public void testAssumptionFailure(Failure failure) {
	}

	public void testIgnored(Description description) throws Exception {
	}
}

 

通知的类为：

package org.junit.runner.notification;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.junit.runner.Description;
import org.junit.runner.Result;

public class RunNotifier {
	private final List fListeners;
	private boolean fPleaseStop;

	public RunNotifier() {
		this.fListeners = Collections.synchronizedList(new ArrayList());

		this.fPleaseStop = false;
	}

	public void addListener(RunListener listener) {
		this.fListeners.add(listener);
	}

	public void removeListener(RunListener listener) {
		this.fListeners.remove(listener);
	}

	public void fireTestRunStarted(Description description) {
		new SafeNotifier(description) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testRunStarted(this.val$description);
			}
		}.run();
	}

	public void fireTestRunFinished(Result result) {
		new SafeNotifier(result) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testRunFinished(this.val$result);
			}
		}.run();
	}

	public void fireTestStarted(Description description)
			throws StoppedByUserException {
		if (this.fPleaseStop)
			throw new StoppedByUserException();
		new SafeNotifier(description) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testStarted(this.val$description);
			}
		}.run();
	}

	public void fireTestFailure(Failure failure) {
		new SafeNotifier(failure) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testFailure(this.val$failure);
			}
		}.run();
	}

	public void fireTestAssumptionFailed(Failure failure) {
		new SafeNotifier(failure) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testAssumptionFailure(this.val$failure);
			}
		}.run();
	}

	public void fireTestIgnored(Description description) {
		new SafeNotifier(description) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testIgnored(this.val$description);
			}
		}.run();
	}

	public void fireTestFinished(Description description) {
		new SafeNotifier(description) {
			protected void notifyListener(RunListener each) throws Exception {
				each.testFinished(this.val$description);
			}
		}.run();
	}

	public void pleaseStop() {
		this.fPleaseStop = true;
	}

	public void addFirstListener(RunListener listener) {
		this.fListeners.add(0, listener);
	}

	private abstract class SafeNotifier {
		void run() {
			Iterator all;
			synchronized (RunNotifier.this.fListeners) {
				for (all = RunNotifier.this.fListeners.iterator(); all
						.hasNext();)
					try {
						notifyListener((RunListener) all.next());
					} catch (Exception e) {
						all.remove();
						RunNotifier.this.fireTestFailure(new Failure(
								Description.TEST_MECHANISM, e));
					}
			}
		}

		protected abstract void notifyListener(RunListener paramRunListener)
				throws Exception;
	}

 

SWTBot的截屏通知为：

package org.eclipse.swtbot.swt.finder.junit;

import org.apache.log4j.Logger;
import org.eclipse.swtbot.swt.finder.utils.SWTBotPreferences;
import org.eclipse.swtbot.swt.finder.utils.SWTUtils;
import org.junit.runner.notification.Failure;
import org.junit.runner.notification.RunListener;

/**
 * Captures screenshots on failure notifications.
 *
 * @author Hans Schwaebli (Bug 259787)
 * @version $Id$
 * @noinstantiate This class is not intended to be instantiated by clients.
 */
public final class ScreenshotCaptureListener extends RunListener {
	/** The logger. */
	private static Logger	log					= Logger.getLogger(SWTBotApplicationLauncherClassRunner.class);

	/** Counts the screenshots to determine if maximum number is reached. */
	private static int		screenshotCounter	= 0;

	public void testFailure(Failure failure) throws Exception {
		captureScreenshot(failure);
	}

	private void captureScreenshot(Failure failure) {
		try {
			int maximumScreenshots = SWTBotPreferences.MAX_ERROR_SCREENSHOT_COUNT;
			String fileName = SWTBotPreferences.SCREENSHOTS_DIR + "/" + failure.getTestHeader() + "." + SWTBotPreferences.SCREENSHOT_FORMAT.toLowerCase(); //$NON-NLS-1$
			if (++screenshotCounter <= maximumScreenshots) {
				captureScreenshot(fileName);
			} else {
				log.info("No screenshot captured for '" + failure.getTestHeader() + "' because maximum number of screenshots reached: " //$NON-NLS-1$ 
						+ maximumScreenshots);
			}
		} catch (Exception e) {
			log.warn("Could not capture screenshot", e); //$NON-NLS-1$
		}
	}

	private boolean captureScreenshot(String fileName) {
		return SWTUtils.captureScreenshot(fileName);
	}
	
	public int hashCode() {
		return 31;
	}

	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		return true;
	}
	
}