/*******************************************************************************
* Copyright 2014 Trevor Robinson
*
* 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.scurrilous.circe.crc;
import static com.scurrilous.circe.HashSupport.HARDWARE;
import static com.scurrilous.circe.HashSupport.INCREMENTAL;
import static com.scurrilous.circe.HashSupport.INT_SIZED;
import static com.scurrilous.circe.HashSupport.LONG_SIZED;
import static com.scurrilous.circe.HashSupport.NATIVE;
import static com.scurrilous.circe.HashSupport.STATEFUL;
import static com.scurrilous.circe.HashSupport.STATELESS_INCREMENTAL;
import static com.scurrilous.circe.params.CrcParameters.CRC32;
import static com.scurrilous.circe.params.CrcParameters.CRC64;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
import java.util.EnumSet;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.SortedMap;
import org.testng.annotations.Test;
import com.scurrilous.circe.HashProvider;
import com.scurrilous.circe.HashProviders;
import com.scurrilous.circe.HashSupport;
import com.scurrilous.circe.IncrementalLongHash;
@SuppressWarnings("javadoc")
public class CRCProvidersTest {
@Test
public void testAll() {
final Iterator<HashProvider> i = HashProviders.iterator();
assertTrue(i.hasNext());
assertTrue(i.next() instanceof StandardCrcProvider);
assertFalse(i.hasNext());
}
@Test
public void testNonUnique() {
final HashProvider provider = HashProviders.best(CRC32);
final IncrementalLongHash i1 = provider.getIncrementalLong(CRC32);
final IncrementalLongHash i2 = provider.getIncrementalLong(CRC32);
assertTrue(i1 != i2);
}
@Test
public void testSearchCRCParametersCRC32() {
final SortedMap<EnumSet<HashSupport>, HashProvider> map = HashProviders.search(CRC32);
assertEquals(1, map.size());
final Entry<EnumSet<HashSupport>, HashProvider> entry = map.entrySet().iterator().next();
assertEquals(EnumSet.of(NATIVE, STATELESS_INCREMENTAL, INCREMENTAL, INT_SIZED, LONG_SIZED,
STATEFUL), entry.getKey());
assertTrue(entry.getValue() instanceof StandardCrcProvider);
}
@Test
public void testSearchCRCParametersCRC64() {
final SortedMap<EnumSet<HashSupport>, HashProvider> map = HashProviders.search(CRC64);
assertEquals(1, map.size());
final Entry<EnumSet<HashSupport>, HashProvider> entry = map.entrySet().iterator().next();
assertEquals(EnumSet.of(STATELESS_INCREMENTAL, INCREMENTAL, LONG_SIZED, STATEFUL),
entry.getKey());
assertTrue(entry.getValue() instanceof StandardCrcProvider);
}
@Test
public void testSearchCRCParametersEnumSet() {
assertEquals(1, HashProviders.search(CRC32, EnumSet.of(NATIVE)).size());
assertTrue(HashProviders.search(CRC64, EnumSet.of(NATIVE)).isEmpty());
assertTrue(HashProviders.search(CRC32, EnumSet.of(HARDWARE)).isEmpty());
}
}