/* Copyright 2016 Mark Gunlogson Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package com.github.mgunlogson.cuckoofilter4j; import static org.junit.Assert.*; import java.util.ArrayList; import java.util.HashSet; import org.junit.Test; import com.github.mgunlogson.cuckoofilter4j.SerializableSaltedHasher; import com.github.mgunlogson.cuckoofilter4j.Utils.Algorithm; import com.google.common.hash.Funnels; import com.google.common.testing.ClassSanityTester; import com.google.common.testing.EqualsTester; import com.google.common.testing.SerializableTester; public class TestSerializableSaltedHasher { @Test(expected = NullPointerException.class) public void testConsturctorNullArgs() { SerializableSaltedHasher.create(null, null); } @Test(expected = NullPointerException.class) public void testConsturctorNullArgs2() { SerializableSaltedHasher.create(null, Funnels.integerFunnel()); } @Test public void testSeeds() { // test a seeded hash alg SerializableSaltedHasher<Integer> hasher1 = new SerializableSaltedHasher<>(1, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32); SerializableSaltedHasher<Integer> hasher2 = new SerializableSaltedHasher<>(2, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32); assertFalse(hasher2.hashObj(42).equals(hasher1.hashObj(42))); assertFalse(hasher2.hashObjWithSalt(42, 1).equals(hasher1.hashObjWithSalt(42, 1))); assertFalse(hasher2.hashObjWithSalt(42, 1).equals(hasher1.hashObj(42))); // test salted alg hasher1 = new SerializableSaltedHasher<>(1, 0, Funnels.integerFunnel(), Algorithm.sha256); hasher2 = new SerializableSaltedHasher<>(2, 0, Funnels.integerFunnel(), Algorithm.sha256); assertFalse(hasher2.hashObj(42).equals(hasher1.hashObj(42))); assertFalse(hasher2.hashObjWithSalt(42, 1).equals(hasher1.hashObjWithSalt(42, 1))); assertFalse(hasher2.hashObjWithSalt(42, 1).equals(hasher1.hashObj(42))); // test seeded-salted algs like SIPHash ArrayList<SerializableSaltedHasher<Integer>> hashAry = new ArrayList<SerializableSaltedHasher<Integer>>(); hashAry.add(new SerializableSaltedHasher<Integer>(1, 1, Funnels.integerFunnel(), Algorithm.sipHash24)); hashAry.add(new SerializableSaltedHasher<Integer>(2, 1, Funnels.integerFunnel(), Algorithm.sipHash24)); hashAry.add(new SerializableSaltedHasher<Integer>(1, 2, Funnels.integerFunnel(), Algorithm.sipHash24)); hashAry.add(new SerializableSaltedHasher<Integer>(2, 2, Funnels.integerFunnel(), Algorithm.sipHash24)); HashSet<Long> results = new HashSet<>(); for (SerializableSaltedHasher<Integer> hashVal : hashAry) { long unsalted = hashVal.hashObj(42).asLong(); assertFalse(results.contains(unsalted)); results.add(unsalted); long salty = hashVal.hashObjWithSalt(42, 1).asLong(); assertFalse(results.contains(salty)); results.add(salty); } } @Test public void testAutoAlgorithm() { SerializableSaltedHasher<Integer> hasher = SerializableSaltedHasher.create(100, Funnels.integerFunnel()); assertTrue(hasher.codeBitSize() == 128); hasher = SerializableSaltedHasher.create(30, Funnels.integerFunnel()); assertTrue(hasher.codeBitSize() < 128); } @Test public void testEquals() { new EqualsTester() .addEqualityGroup( new SerializableSaltedHasher<byte[]>(0, 0, Funnels.byteArrayFunnel(), Algorithm.Murmur3_32)) .addEqualityGroup( new SerializableSaltedHasher<byte[]>(1, 0, Funnels.byteArrayFunnel(), Algorithm.Murmur3_32)) .addEqualityGroup( new SerializableSaltedHasher<byte[]>(0, 1, Funnels.byteArrayFunnel(), Algorithm.Murmur3_32)) .addEqualityGroup( new SerializableSaltedHasher<Integer>(0, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32)) .addEqualityGroup( new SerializableSaltedHasher<byte[]>(0, 0, Funnels.byteArrayFunnel(), Algorithm.sha256)) .testEquals(); } @Test public void testEqualsSame() { assertTrue(new SerializableSaltedHasher<Integer>(0, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32) .equals(new SerializableSaltedHasher<Integer>(0, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32))); } @Test public void testCopy() { SerializableSaltedHasher<Integer> hasher = new SerializableSaltedHasher<>(0, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32); SerializableSaltedHasher<Integer> hasherCopy = hasher.copy(); assertTrue(hasherCopy.equals(hasher)); assertNotSame(hasher, hasherCopy); } @Test public void autoTestNulls() { new ClassSanityTester().testNulls(SerializableSaltedHasher.class); } @Test public void testSerialize() { SerializableTester.reserializeAndAssert( new SerializableSaltedHasher<Integer>(0, 0, Funnels.integerFunnel(), Algorithm.Murmur3_32)); } }