CacheMapTest.java

/*
 * Copyright 2015 S. Webber
 * 
 * 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 org.oakgp.util;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.Map;

import org.junit.Test;

public class CacheMapTest {
   @Test
   public void testSynchronized() {
      assertEquals("java.util.Collections$SynchronizedMap", CacheMap.createCache(3).getClass().getName());
   }

   @Test
   public void testSizeThree() {
      final int maxSize = 3;
      Map<String, Integer> m = CacheMap.createCache(maxSize);

      m.put("a", 1);
      m.put("b", 1);
      m.put("c", 1);
      m.put("d", 1);
      m.put("e", 1);

      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey("c"));
      assertTrue(m.containsKey("d"));
      assertTrue(m.containsKey("e"));

      m.put("a", 1);

      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey("a"));
      assertTrue(m.containsKey("d"));
      assertTrue(m.containsKey("e"));

      m.get("d");
      m.put("x", 1);
      m.get("d");
      m.put("y", 1);
      m.get("d");
      m.put("z", 1);

      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey("d"));
      assertTrue(m.containsKey("y"));
      assertTrue(m.containsKey("z"));

      m.get("y");
      m.get("z");
      m.put("a", 1);
      m.get("y");
      m.get("z");
      m.put("b", 1);
      m.get("y");
      m.get("z");
      m.put("x", 1);

      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey("x"));
      assertTrue(m.containsKey("y"));
      assertTrue(m.containsKey("z"));

      m.put("q", 1);
      m.put("r", 1);
      m.put("y", 1);

      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey("q"));
      assertTrue(m.containsKey("r"));
      assertTrue(m.containsKey("y"));
   }

   @Test
   public void testSizeTen() {
      final int maxSize = 10;
      Map<Integer, String> m = CacheMap.createCache(maxSize);

      for (int i = 0; i <= maxSize; i++) {
         m.put(i, "");
      }
      assertEquals(maxSize, m.size());
      assertFalse(m.containsKey(0));

      for (int i = 0; i <= maxSize; i++) {
         m.put(i, "");
         m.get(0);
      }
      assertEquals(maxSize, m.size());
      assertTrue(m.containsKey(0));
   }
}