initial import of IntIntHashmap + JUnitTest including a benchmark.

1 files changed, 139 insertions, 0 deletions

diff --git a/test/junit/com/jogamp/common/util/IntIntHashMapTest.java b/test/junit/com/jogamp/common/util/IntIntHashMapTest.java
new file mode 100644
index 0000000..6ccf0e3
--- /dev/null
+++ b/test/junit/com/jogamp/common/util/IntIntHashMapTest.java
@@ -0,0 +1,139 @@
+/**
+ * Created on Sunday, March 28 2010 21:01
+ */
+package com.jogamp.common.util;
+
+import java.util.HashMap;
+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 benchmark() {
+
+        // simple benchmark
+        final IntIntHashMap intmap          = new IntIntHashMap(1024);
+        final HashMap<Integer, Integer> map = new HashMap<Integer, Integer>(1024);
+
+        out.println("put");
+        long time = currentTimeMillis();
+        for (int i = 0; i < iterations; i++) {
+            intmap.put(rndKeys[i], rndValues[i]);
+        }
+        long intmapTime = (currentTimeMillis() - time);
+        out.println("   iimap: " + intmapTime+"ms");
+
+
+        time = currentTimeMillis();
+        for (int i = 0; i < iterations; i++) {
+            map.put(rndKeys[i], rndValues[i]);
+        }
+        long mapTime = (currentTimeMillis() - time);
+        out.println("   map:   " + mapTime+"ms");
+
+        assertTrue(intmapTime < mapTime);
+
+
+        System.out.println();
+        System.out.println("get");
+        intmapTime = (currentTimeMillis() - time);
+        out.println("   iimap: " + intmapTime+"ms");
+        for (int i = 0; i < iterations; i++) {
+            intmap.get(rndValues[i]);
+        }
+        
+        mapTime = (currentTimeMillis() - time);
+        out.println("   map:   " + mapTime+"ms");
+        for (int i = 0; i < iterations; i++) {
+            map.get(rndValues[i]);
+        }
+        assertTrue(intmapTime < mapTime);
+
+
+        out.println();
+        out.println("remove");
+        intmapTime = (currentTimeMillis() - time);
+        out.println("   iimap: " + intmapTime+"ms");
+        for (int i = 0; i < iterations; i++) {
+            intmap.remove(rndValues[i]);
+        }
+
+        mapTime = (currentTimeMillis() - time);
+        out.println("   map:   " + mapTime+"ms");
+        for (int i = 0; i < iterations; i++) {
+            map.remove(rndValues[i]);
+        }
+
+        assertTrue(intmapTime < mapTime);
+    }
+
+
+}