package org.eclipse.jgit.logging;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertFalse;
   import static org.junit.Assert.assertTrue;
   
   import org.junit.Test;
   import java.util.List;
   
  /**
   * Tests for performance log context utilities.
   */
  public class PerformanceLogContextTest {
  
  	@Test
  	public void testAddEvent() {
  		PerformanceLogRecord record = new PerformanceLogRecord("record", 0);
  		PerformanceLogContext.getInstance().addEvent(record);
  
  		List<PerformanceLogRecord> eventRecords = PerformanceLogContext
  				.getInstance().getEventRecords();
  		assertTrue(eventRecords.contains(record));
  		assertEquals(1, eventRecords.size());
  	}
  
  	@Test
  	public void testCleanEvents() {
  		PerformanceLogRecord record1 = new PerformanceLogRecord("record1", 0);
  		PerformanceLogContext.getInstance().addEvent(record1);
  
  		PerformanceLogRecord record2 = new PerformanceLogRecord("record2", 0);
  		PerformanceLogContext.getInstance().addEvent(record2);
  
  		PerformanceLogContext.getInstance().cleanEvents();
  		List<PerformanceLogRecord> eventRecords = PerformanceLogContext
  				.getInstance().getEventRecords();
  		assertEquals(0, eventRecords.size());
  	}
  
  	@Test
  	public void testAddEventsTwoThreads() throws InterruptedException {
  		TestRunnable runnable1 = new TestRunnable("record1", 1);
  		TestRunnable runnable2 = new TestRunnable("record2", 2);
  
  		Thread thread1 = new Thread(runnable1);
  		Thread thread2 = new Thread(runnable2);
  
  		thread1.start();
  		thread2.start();
  
  		thread1.join();
  		thread2.join();
  		assertEquals(1, runnable1.getEventRecordsCount());
  		assertEquals(1, runnable2.getEventRecordsCount());
  		assertFalse(runnable1.isThrown());
  		assertFalse(runnable2.isThrown());
  	}
  
  	private static class TestRunnable implements Runnable {
  		private String name;
  
  		private long durationMs;
  
  		private long eventRecordsCount;
  
  		private boolean thrown = false;
  
  		public TestRunnable(String name, long durationMs) {
  			this.name = name;
  			this.durationMs = durationMs;
  		}
  
  		public boolean isThrown() {
  			return thrown;
  		}
  
  		public long getEventRecordsCount() {
  			return eventRecordsCount;
  		}
  
  		@Override
  		public void run() {
  			PerformanceLogRecord record = new PerformanceLogRecord(name,
  					durationMs);
  			try {
  				PerformanceLogContext.getInstance().addEvent(record);
  				eventRecordsCount = PerformanceLogContext.getInstance()
  						.getEventRecords().size();
  				PerformanceLogContext.getInstance().cleanEvents();
  			} catch (Exception e) {
  				thrown = true;
  			}
  		}
  	}
  }