org.eclipse.linuxtools.tmf.core.tests/src/org/eclipse/linuxtools/tmf/core/tests/ctfadaptor/CtfTmfContextTest.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Matthew Khouzam - Initial implementation
  11  *   Alexandre Montplaisir
  12  *******************************************************************************/
  13
  14 package org.eclipse.linuxtools.tmf.core.tests.ctfadaptor;
  15
  16 import static org.junit.Assert.assertNotSame;
  17 import static org.junit.Assert.assertSame;
  18 import static org.junit.Assert.assertTrue;
  19
  20 import java.util.ArrayList;
  21
  22 import org.eclipse.core.resources.IResource;
  23 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfEvent;
  24 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfContext;
  25 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfTrace;
  26 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
  27 import org.junit.Before;
  28 import org.junit.Test;
  29
  30 /**
  31  * Tests for the CtfTmfLightweightContext class
  32  *
  33  * @author Matthew Khouzam
  34  * @version 1.1
  35  */
  36 public class CtfTmfContextTest {
  37
  38     private static final String PATH = TestParams.getPath();
  39     private static final long begin = 1332170682440133097L; /* Trace start time */
  40     private static final long end = 1332170692664579801L; /* Trace end time */
  41
  42     private CtfTmfTrace trace;
  43
  44     private class SeekerThread extends Thread {
  45         long val;
  46
  47         public void setVal(long val) {
  48             this.val = val;
  49         }
  50     }
  51
  52     /**
  53      * Pre-test initialization
  54      *
  55      * @throws TmfTraceException
  56      *             If the trace couldn't be init'ed, which shouldn't happen.
  57      */
  58     @Before
  59     public void setUp() throws TmfTraceException {
  60         trace = new CtfTmfTrace();
  61         trace.initTrace((IResource) null, PATH, CtfTmfEvent.class);
  62     }
  63
  64     /**
  65      * Index all the events in the test trace.
  66      */
  67     @Test
  68     public void testIndexing() {
  69         CtfTmfContext context = new CtfTmfContext(trace);
  70         context.seek(0);
  71
  72         int count = 0;
  73         while (trace.getNext(context) != null) {
  74             count++;
  75         }
  76         assertTrue(count > 0);
  77     }
  78
  79     /**
  80      * Context fuzzer. Use an amount of contexts greater than the size of the
  81      * iterator cache and have them access the trace in parallel.
  82      *
  83      * @throws InterruptedException
  84      *             Would fail the test
  85      */
  86     @Test
  87     public void testTooManyContexts() throws InterruptedException {
  88         final int lwcCount = 101;
  89         double increment = (end - begin) / lwcCount;
  90         final ArrayList<Long> vals = new ArrayList<Long>();
  91         final ArrayList<Thread> threads = new ArrayList<Thread>();
  92         final ArrayList<CtfTmfContext> tooManyContexts = new ArrayList<CtfTmfContext>();
  93
  94         for (double i = begin; i < end; i += increment) {
  95             SeekerThread thread = new SeekerThread() {
  96                 @Override
  97                 public void run() {
  98                     CtfTmfContext lwc = new CtfTmfContext(trace);
  99                     lwc.seek(val);
 100                     trace.getNext(lwc);
 101                     synchronized(trace){
 102                         if (lwc.getCurrentEvent() != null) {
 103                             vals.add(lwc.getCurrentEvent().getTimestamp().getValue());
 104                         }
 105                         tooManyContexts.add(lwc);
 106                     }
 107                 }
 108             };
 109             thread.setVal((long)i);
 110             threads.add(thread);
 111             thread.start();
 112         }
 113
 114         for( Thread t: threads){
 115             t.join();
 116         }
 117
 118         for( Long val : vals){
 119             assertTrue(val >= begin);
 120             assertTrue(val <= end);
 121         }
 122     }
 123
 124     /**
 125      * Test for clone method
 126      */
 127     @Test
 128     public void testClone() {
 129         CtfTmfContext fixture1 = new CtfTmfContext(trace);
 130         CtfTmfContext fixture2 = fixture1.clone();
 131         //assertTrue(fixture1.equals(fixture2)); FIXME no .equals() override!
 132         assertNotSame(fixture1, fixture2);
 133
 134         /* Make sure clone() did its job */
 135         assertSame(fixture1.getTrace(), fixture2.getTrace());
 136         assertSame(fixture1.getLocation(), fixture2.getLocation());
 137         assertSame(fixture1.getRank(), fixture2.getRank());
 138     }
 139 }