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/* ==========================================
* JGraphT : a free Java graph-theory library
* ==========================================
*
* Project Info: http://jgrapht.sourceforge.net/
* Project Creator: Barak Naveh (http://sourceforge.net/users/barak_naveh)
*
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
/* -----------------
* FibonacciHeapTest.java
* -----------------
* (C) Copyright 2008-2008, by John V. Sichi and Contributors.
*
* Original Author: John V. Sichi
* Contributor(s): -
*
* $Id: FibonacciHeapTest.java 701 2010-01-04 08:36:24Z perfecthash $
*
* Changes
* -------
* 20-Apr-2008 : Initial revision (JVS);
*/
package org.jgrapht.util;
import java.util.*;
import junit.framework.*;
public class FibonacciHeapTest
extends TestCase
{
//~ Methods ----------------------------------------------------------------
// in honor of sf.net bug #1845376
public void testAddRemoveOne()
{
String s = "A";
FibonacciHeapNode<String> n = new FibonacciHeapNode<String>(s);
FibonacciHeap<String> h = new FibonacciHeap<String>();
assertTrue(h.isEmpty());
h.insert(n, 1.0);
assertFalse(h.isEmpty());
FibonacciHeapNode<String> n2 = h.removeMin();
assertEquals(s, n2.getData());
assertTrue(h.isEmpty());
}
public void testGrowReplaceShrink()
{
Random r = new Random();
int k = 10000;
String s = "A";
double t = 0;
FibonacciHeap<String> h = new FibonacciHeap<String>();
for (int i = 0; i < (k * 3); ++i) {
// during first two-thirds, insert
if (i < (k * 2)) {
double d = r.nextDouble();
t += d;
FibonacciHeapNode<String> n = new FibonacciHeapNode<String>(s);
h.insert(n, d);
}
// during last two-thirds, delete (so during middle
// third, we'll do both insert and delete, interleaved)
if (i >= k) {
FibonacciHeapNode<String> n2 = h.removeMin();
t -= n2.getKey();
}
}
assertTrue(h.isEmpty());
// tally should come back down to zero, or thereabouts (due to roundoff)
assertEquals(0.0, t, 0.00001);
}
}
// End FibonacciHeapTest.java
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