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  package org.apache.cayenne.util.concurrentlinkedhashmap;
  
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  
  public class ConcurrentLinkedHashMapTest {
  
  	@Test
  	public void testPutGet() {
  		ConcurrentLinkedHashMap<String, Object> m = new ConcurrentLinkedHashMap.Builder<String, Object>()
  				.maximumWeightedCapacity(10).build();
  
  		assertEquals(0, m.size());
  		m.put("k1", 100);
  		assertEquals(1, m.size());
  		assertNull(m.get("nosuchkey"));
  		assertEquals(100, m.get("k1"));
  
  		m.put("k2", 200);
  		assertEquals(2, m.size());
  		assertEquals(200, m.get("k2"));
  	}
  
  	@Test
  	public void testLRU() {
  		ConcurrentLinkedHashMap<String, Object> m = new ConcurrentLinkedHashMap.Builder<String, Object>()
  				.maximumWeightedCapacity(5).build();
  
  		assertEquals(0, m.size());
  		m.put("k1", 100);
  		assertEquals(1, m.size());
  		m.put("k2", 101);
  		assertEquals(2, m.size());
  		m.put("k3", 102);
  		assertEquals(3, m.size());
  		m.put("k4", 103);
  		assertEquals(4, m.size());
  		m.put("k5", 104);
  		assertEquals(5, m.size());
  		m.put("k6", 105);
  		assertEquals(5, m.size());
  		m.put("k7", 106);
  		assertEquals(5, m.size());
  		m.put("k8", 107);
  		assertEquals(5, m.size());
  
  		m.remove("k6");
  		assertEquals(4, m.size());
  
  	}
  }
  