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ConsistentHashModuloTest.java
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ConsistentHashModuloTest.java
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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 org.apache.activemq.artemis.core.server.routing.transformer;
import java.util.HashMap;
import org.apache.activemq.artemis.core.server.routing.KeyResolver;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
public class ConsistentHashModuloTest {
@Test
public void transform() {
ConsistentHashModulo underTest = new ConsistentHashModulo();
assertEquals(KeyResolver.DEFAULT_KEY_VALUE, underTest.transform(KeyResolver.DEFAULT_KEY_VALUE));
assertEquals("AA", underTest.transform("AA")); // default modulo 0 does nothing
HashMap<String, String> properties = new HashMap<>();
final int modulo = 2;
properties.put(ConsistentHashModulo.MODULO, String.valueOf(modulo));
underTest.init(properties);
String hash1 = underTest.transform("AAA");
int v1 = Integer.parseInt(hash1);
String hash2 = underTest.transform("BBB");
int v2 = Integer.parseInt(hash2);
assertNotEquals(hash1, hash2);
assertNotEquals(v1, v2);
assertTrue(v1 < modulo && v2 < modulo);
}
}