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/**
* Created on Sunday, March 28 2010 21:01
*/
package com.jogamp.common.util;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.Random;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import static java.lang.System.*;
/**
*
* @author Michael Bien
*/
public class IntIntHashMapTest {
private static int iterations;
private static int[] rndKeys;
private static int[] rndValues;
@BeforeClass
public static void init() {
iterations = 20000;
final int keySeed = 42;
final int valueSeed = 23;
Random keyRnd = new Random(/*keySeed*/);
Random valueRnd = new Random(/*valueSeed*/);
rndKeys = new int[iterations];
rndValues = new int[iterations];
for (int i = 0; i < iterations; i++) {
rndValues[i] = valueRnd.nextInt();
rndKeys[i] = keyRnd.nextInt();
}
}
/**
* Test of put method, of class IntIntHashMap.
*/
@Test
public void testPutRemove() {
final IntIntHashMap intmap = new IntIntHashMap();
final HashMap<Integer, Integer> map = new HashMap<Integer, Integer>();
// put
for (int i = 0; i < iterations; i++) {
intmap.put(rndKeys[i], rndValues[i]);
assertTrue(intmap.containsValue(rndValues[i]));
assertTrue(intmap.containsKey(rndKeys[i]));
}
for (int i = 0; i < iterations; i++) {
map.put(rndKeys[i], rndValues[i]);
}
assertEquals(map.size(), intmap.size());
for (Entry<Integer, Integer> entry : map.entrySet()) {
assertTrue(intmap.containsKey(entry.getKey()));
assertTrue(intmap.containsValue(entry.getValue()));
}
int i = 0;
for (Entry<Integer, Integer> entry : map.entrySet()) {
assertEquals((int)entry.getValue(), intmap.remove(entry.getKey()));
assertEquals(map.size() - i - 1, intmap.size());
i++;
}
}
@Test
public void iteratorTest() {
final IntIntHashMap intmap = new IntIntHashMap(iterations);
for (int i = 0; i < iterations; i++) {
intmap.put(rndKeys[i], rndValues[i]);
}
Iterator iterator = intmap.iterator();
assertNotNull(iterator);
assertTrue(iterator.hasNext());
int n = 0;
while (iterator.hasNext()) {
IntIntHashMap.Entry entry = (IntIntHashMap.Entry)iterator.next();
assertNotNull(entry);
n++;
}
assertEquals(intmap.size(), n);
// out.println(intmap);
}
@Test
public void benchmark() {
// simple benchmark
final IntIntHashMap intmap = new IntIntHashMap(1024);
final HashMap<Integer, Integer> map = new HashMap<Integer, Integer>(1024);
out.println(intmap.getClass().getName()+" vs "+map.getClass().getName());
out.println("put");
long time = nanoTime();
for (int i = 0; i < iterations; i++) {
intmap.put(rndKeys[i], rndValues[i]);
}
long intmapPutTime = (nanoTime() - time);
out.println(" iimap: " + intmapPutTime/1000000.0f+"ms");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
map.put(rndKeys[i], rndValues[i]);
}
long mapPutTime = (nanoTime() - time);
out.println(" map: " + mapPutTime/1000000.0f+"ms");
System.out.println();
System.out.println("get");
long intmapGetTime = (nanoTime() - time);
out.println(" iimap: " + intmapGetTime/1000000.0f+"ms");
for (int i = 0; i < iterations; i++) {
intmap.get(rndValues[i]);
}
long mapGetTime = (nanoTime() - time);
out.println(" map: " + mapGetTime/1000000.0f+"ms");
for (int i = 0; i < iterations; i++) {
map.get(rndValues[i]);
}
out.println();
out.println("remove");
long intmapRemoveTime = (nanoTime() - time);
out.println(" iimap: " + intmapRemoveTime/1000000.0f+"ms");
for (int i = 0; i < iterations; i++) {
intmap.remove(rndValues[i]);
}
long mapRemoveTime = (nanoTime() - time);
out.println(" map: " + mapRemoveTime/1000000.0f+"ms");
for (int i = 0; i < iterations; i++) {
map.remove(rndValues[i]);
}
assertTrue("'put' to slow", intmapPutTime <= mapPutTime);
assertTrue("'get' to slow", intmapGetTime <= mapGetTime);
assertTrue("'remove' to slow", intmapRemoveTime <= mapRemoveTime);
}
}
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