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Correctly resize integer map (#2422)

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Lukas Alt 2023-06-08 15:08:57 +02:00 committed by GitHub
parent 260cb22f53
commit 88d8c2eb1d
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2 changed files with 24 additions and 2 deletions
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3
src/main/java/com/comphenix/protocol/collections/IntegerMap.java
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@ -76,8 +76,7 @@ public class IntegerMap<T> {
// Fast calculation of the new size.
// See IntMath#ceilingPowerOfTwo in newer guava versions.
int newLength = IntegerMath.nextPowerOfTwo(key);
int newLength = IntegerMath.nextPowerOfTwo(key + 1);
this.array = Arrays.copyOf(array, newLength);
}

23
src/test/java/com/comphenix/protocol/collections/IntegerMapTest.java Normal file
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@ -0,0 +1,23 @@
package com.comphenix.protocol.collections;
import com.comphenix.protocol.utility.IntegerMath;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
class IntegerMapTest {
@Test
public void testNextPower() {
assertEquals(128, IntegerMath.nextPowerOfTwo(127));
assertEquals(128, IntegerMath.nextPowerOfTwo(128));
assertEquals(256, IntegerMath.nextPowerOfTwo(129));
}
@Test
public void testCapacityIncrement() {
IntegerMap<Boolean> map = new IntegerMap<>();
for (int i = 0; i < 512; i++) {
map.put(i, false);
}
assertEquals(map.size(), 512);
}
}