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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.collections;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* @author bratseth
*/
public class CopyOnWriteHashMapTestCase {
@Test
public void testModifySourceFirst() {
CopyOnWriteHashMap<String, String> map = new CopyOnWriteHashMap<>();
map.put("a", "a1");
map.put("b", "b1");
CopyOnWriteHashMap<String,String> clone = map.clone();
map.put("c", "c1");
clone.remove("a");
clone.put("b", "b2");
clone.put("d", "d2");
assertEquals(3, map.size());
assertEquals("a1", map.get("a"));
assertEquals("b1", map.get("b"));
assertEquals("c1", map.get("c"));
assertEquals(2, clone.size());
assertEquals("b2", clone.get("b"));
assertEquals("d2", clone.get("d"));
}
@Test
public void testModifyTargetFirst() {
CopyOnWriteHashMap<String, String> map = new CopyOnWriteHashMap<>();
map.put("a", "a1");
map.put("b", "b1");
CopyOnWriteHashMap<String,String> clone = map.clone();
clone.remove("a");
map.put("c", "c1");
clone.put("b", "b2");
clone.put("d", "d2");
assertEquals(3, map.size());
assertEquals("a1", map.get("a"));
assertEquals("b1", map.get("b"));
assertEquals("c1", map.get("c"));
assertEquals(2, clone.size());
assertEquals("b2", clone.get("b"));
assertEquals("d2", clone.get("d"));
}
@Test
public void testCallEntrySetThenModify() {
CopyOnWriteHashMap<String, String> map = new CopyOnWriteHashMap<>();
map.put("a", "a1");
map.entrySet();
CopyOnWriteHashMap<String,String> clone = map.clone();
clone.put("b", "b1");
assertEquals(2, clone.size());
}
}
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