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/*******************************************************************************
* Copyright (c) 2005, 2009 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.tests.performance;
import org.eclipse.compare.contentmergeviewer.ITokenComparator;
import org.eclipse.compare.internal.DocLineComparator;
import org.eclipse.compare.rangedifferencer.RangeDifference;
import org.eclipse.compare.rangedifferencer.RangeDifferencer;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.test.performance.Dimension;
import org.eclipse.test.performance.PerformanceTestCase;
public class RangeDifferencerTest extends PerformanceTestCase {
// static private final String EXPLANATION = "Performance decrease caused by changes in the compare framework, see bug 210688";
public RangeDifferencerTest(String name) {
super(name);
}
/*
* Creates document with 5000 lines.
* Parameter code determines where additional lines are added.
*/
private IDocument createDocument(int code) {
StringBuffer sb= new StringBuffer();
for (int i= 0; i < 5000; i++) {
sb.append("line "); //$NON-NLS-1$
sb.append(Integer.toString(i));
sb.append('\n');
int mod= i % 10;
switch (code) {
case 1:
if (mod == 1)
sb.append("outgoing\n"); //$NON-NLS-1$
if (mod == 4)
sb.append("conflict1\n"); //$NON-NLS-1$
break;
case 2:
if (mod == 7)
sb.append("incoming\n"); //$NON-NLS-1$
if (mod == 4)
sb.append("conflict2\n"); //$NON-NLS-1$
break;
}
}
return new Document(sb.toString());
}
public void testLargeDocument() {
tagAsGlobalSummary("3-way compare, 5000 lines", Dimension.ELAPSED_PROCESS); //$NON-NLS-1$
// setComment(Performance.EXPLAINS_DEGRADATION_COMMENT, EXPLANATION);
ITokenComparator ancestor= new DocLineComparator(createDocument(0), null, false);
ITokenComparator left= new DocLineComparator(createDocument(1), null, false);
ITokenComparator right= new DocLineComparator(createDocument(2), null, false);
RangeDifference[] diffs= null;
// a warm up run
diffs= RangeDifferencer.findRanges(new NullProgressMonitor(), ancestor, left, right);
// assert that result correct
for (int i= 0; i < diffs.length-6; i+= 6) {
assertEquals(diffs[i+0].kind(), RangeDifference.NOCHANGE);
assertEquals(diffs[i+1].kind(), RangeDifference.LEFT);
assertEquals(diffs[i+2].kind(), RangeDifference.NOCHANGE);
assertEquals(diffs[i+3].kind(), RangeDifference.CONFLICT);
assertEquals(diffs[i+4].kind(), RangeDifference.NOCHANGE);
assertEquals(diffs[i+5].kind(), RangeDifference.RIGHT);
}
// now do 3 performance runs
for (int count= 0; count < 3; count++) {
startMeasuring();
RangeDifferencer.findRanges(new NullProgressMonitor(), ancestor, left, right);
stopMeasuring();
}
commitMeasurements();
assertPerformance();
}
}
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