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 import static org.junit.Assume.assumeTrue;
  20
  21 import java.util.ArrayList;
  22
  23 import org.eclipse.core.resources.IResource;
  24 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfContext;
  25 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfEvent;
  26 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfTrace;
  27 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
  28 import org.eclipse.linuxtools.tmf.core.tests.shared.CtfTmfTestTraces;
  29 import org.junit.Before;
  30 import org.junit.Test;
  31
  32 /**
  33  * Tests for the CtfTmfLightweightContext class
  34  *
  35  * @author Matthew Khouzam
  36  * @version 1.1
  37  */
  38 public class CtfTmfContextTest {
  39
  40     private static final int TRACE_INDEX = 0;
  41     private static final long begin = 1332170682440133097L; /* Trace start time */
  42     private static final long end = 1332170692664579801L; /* Trace end time */
  43
  44     private CtfTmfTrace trace;
  45
  46     private class SeekerThread extends Thread {
  47         long val;
  48
  49         public void setVal(long val) {
  50             this.val = val;
  51         }
  52     }
  53
  54     /**
  55      * Pre-test initialization
  56      *
  57      * @throws TmfTraceException
  58      *             If the trace couldn't be init'ed, which shouldn't happen.
  59      */
  60     @Before
  61     public void setUp() throws TmfTraceException {
  62         assumeTrue(CtfTmfTestTraces.tracesExist());
  63         trace = new CtfTmfTrace();
  64         String path = CtfTmfTestTraces.getTestTracePath(TRACE_INDEX);
  65         trace.initTrace((IResource) null, path, CtfTmfEvent.class);
  66     }
  67
  68     /**
  69      * Index all the events in the test trace.
  70      */
  71     @Test
  72     public void testIndexing() {
  73         CtfTmfContext context = new CtfTmfContext(trace);
  74         context.seek(0);
  75
  76         int count = 0;
  77         while (trace.getNext(context) != null) {
  78             count++;
  79         }
  80         assertTrue(count > 0);
  81     }
  82
  83     /**
  84      * Context fuzzer. Use an amount of contexts greater than the size of the
  85      * iterator cache and have them access the trace in parallel.
  86      *
  87      * @throws InterruptedException
  88      *             Would fail the test
  89      */
  90     @Test
  91     public void testTooManyContexts() throws InterruptedException {
  92         final int lwcCount = 101;
  93         double increment = (end - begin) / lwcCount;
  94         final ArrayList<Long> vals = new ArrayList<Long>();
  95         final ArrayList<Thread> threads = new ArrayList<Thread>();
  96         final ArrayList<CtfTmfContext> tooManyContexts = new ArrayList<CtfTmfContext>();
  97
  98         for (double i = begin; i < end; i += increment) {
  99             SeekerThread thread = new SeekerThread() {
 100                 @Override
 101                 public void run() {
 102                     CtfTmfContext lwc = new CtfTmfContext(trace);
 103                     lwc.seek(val);
 104                     trace.getNext(lwc);
 105                     synchronized(trace){
 106                         if (lwc.getCurrentEvent() != null) {
 107                             vals.add(lwc.getCurrentEvent().getTimestamp().getValue());
 108                         }
 109                         tooManyContexts.add(lwc);
 110                     }
 111                 }
 112             };
 113             thread.setVal((long)i);
 114             threads.add(thread);
 115             thread.start();
 116         }
 117
 118         for( Thread t: threads){
 119             t.join();
 120         }
 121
 122         for( Long val : vals){
 123             assertTrue(val >= begin);
 124             assertTrue(val <= end);
 125         }
 126     }
 127
 128     /**
 129      * Test for clone method
 130      */
 131     @Test
 132     public void testClone() {
 133         CtfTmfContext fixture1 = new CtfTmfContext(trace);
 134         CtfTmfContext fixture2 = fixture1.clone();
 135         //assertTrue(fixture1.equals(fixture2)); FIXME no .equals() override!
 136         assertNotSame(fixture1, fixture2);
 137
 138         /* Make sure clone() did its job */
 139         assertSame(fixture1.getTrace(), fixture2.getTrace());
 140         assertSame(fixture1.getLocation(), fixture2.getLocation());
 141         assertSame(fixture1.getRank(), fixture2.getRank());
 142     }
 143 }