package org.mapdb.jsr166Tests;/*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
import org.junit.Test;
import java.io.Serializable;
import java.util.*;
import java.util.concurrent.ConcurrentMap;
public abstract class ConcurrentHashMapTest extends JSR166Test {
public abstract ConcurrentMap<Integer, String> makeMap();
public abstract ConcurrentMap makeGenericMap();
/**
* Returns a new map from Integers 1-5 to Strings "A"-"E".
*/
ConcurrentMap<Integer, String> map5() {
ConcurrentMap map = makeMap();
assertTrue(map.isEmpty());
map.put(one, "A");
map.put(two, "B");
map.put(three, "C");
map.put(four, "D");
map.put(five, "E");
assertFalse(map.isEmpty());
assertEquals(5, map.size());
return map;
}
/** Re-implement Integer.compare for old java versions */
static int compare(int x, int y) {
return (x < y) ? -1 : (x > y) ? 1 : 0;
}
static class BS implements Comparable<BS>, Serializable {
private final String value;
BS(String value) { this.value = value; }
public int compareTo(BS other) {
return value.compareTo(other.value);
}
public boolean equals(Object x) {
return (x instanceof BS) && value.equals(((BS)x).value);
}
public int hashCode() { return 42; }
}
static class LexicographicList<E extends Comparable<E>> extends ArrayList<E>
implements Comparable<LexicographicList<E>> {
LexicographicList(Collection<E> c) { super(c); }
LexicographicList(E e) { super(Collections.singleton(e)); }
public int compareTo(LexicographicList<E> other) {
int common = Math.min(size(), other.size());
int r = 0;
for (int i = 0; i < common; i++) {
if ((r = get(i).compareTo(other.get(i))) != 0)
break;
}
if (r == 0)
r = compare(size(), other.size());
return r;
}
private static final long serialVersionUID = 0;
}
static class CollidingObject implements Serializable {
final String value;
CollidingObject(final String value) { this.value = value; }
public int hashCode() { return this.value.hashCode() & 1; }
public boolean equals(final Object obj) {
return (obj instanceof CollidingObject) && ((CollidingObject)obj).value.equals(value);
}
}
/**
* clear removes all pairs
*/
@Test public void testClear() {
ConcurrentMap map = map5();
map.clear();
assertEquals(0, map.size());
}
/**
* Maps with same contents are equal
*/
@Test public void testEquals() {
ConcurrentMap map1 = map5();
ConcurrentMap map2 = map5();
assertEquals(map1, map2);
assertEquals(map2, map1);
map1.clear();
assertFalse(map1.equals(map2));
assertFalse(map2.equals(map1));
}
//TODO hash code
// /**
// * hashCode() equals sum of each key.hashCode ^ value.hashCode
// */
// @Test public void testHashCode() {
// ConcurrentMap<Integer,String> map = map5();
// int sum = 0;
// for (Map.Entry<Integer,String> e : map.entrySet())
// sum += e.getKey().hashCode() ^ e.getValue().hashCode();
// assertEquals(sum, map.hashCode());
// }
/**
* contains returns true for contained value
*/
@Test public void testContains() {
ConcurrentMap map = map5();
assertTrue(map.containsValue("A"));
assertFalse(map.containsValue("Z"));
}
/**
* containsKey returns true for contained key
*/
@Test public void testContainsKey() {
ConcurrentMap map = map5();
assertTrue(map.containsKey(one));
assertFalse(map.containsKey(zero));
}
/**
* containsValue returns true for held values
*/
@Test public void testContainsValue() {
ConcurrentMap map = map5();
assertTrue(map.containsValue("A"));
assertFalse(map.containsValue("Z"));
}
/**
* get returns the correct element at the given key,
* or null if not present
*/
@Test public void testGet() {
ConcurrentMap map = map5();
assertEquals("A", (String)map.get(one));
ConcurrentMap empty = makeGenericMap();
assertNull(map.get(111111));
assertNull(empty.get(111111111));
}
/**
* isEmpty is true of empty map and false for non-empty
*/
@Test public void testIsEmpty() {
ConcurrentMap empty = makeMap();
ConcurrentMap map = map5();
assertTrue(empty.isEmpty());
assertFalse(map.isEmpty());
}
/**
* keySet returns a Set containing all the keys
*/
@Test public void testKeySet() {
ConcurrentMap map = map5();
Set s = map.keySet();
assertEquals(5, s.size());
assertTrue(s.contains(one));
assertTrue(s.contains(two));
assertTrue(s.contains(three));
assertTrue(s.contains(four));
assertTrue(s.contains(five));
}
/**
* keySet.toArray returns contains all keys
*/
@Test public void testKeySetToArray() {
ConcurrentMap map = map5();
Set s = map.keySet();
Object[] ar = s.toArray();
assertTrue(s.containsAll(Arrays.asList(ar)));
assertEquals(5, ar.length);
ar[0] = m10;
assertFalse(s.containsAll(Arrays.asList(ar)));
}
/**
* Values.toArray contains all values
*/
@Test public void testValuesToArray() {
ConcurrentMap map = map5();
Collection v = map.values();
Object[] ar = v.toArray();
ArrayList s = new ArrayList(Arrays.asList(ar));
assertEquals(5, ar.length);
assertTrue(s.contains("A"));
assertTrue(s.contains("B"));
assertTrue(s.contains("C"));
assertTrue(s.contains("D"));
assertTrue(s.contains("E"));
}
/**
* entrySet.toArray contains all entries
*/
@Test public void testEntrySetToArray() {
ConcurrentMap map = map5();
Set s = map.entrySet();
Object[] ar = s.toArray();
assertEquals(5, ar.length);
for (int i = 0; i < 5; ++i) {
assertTrue(map.containsKey(((Map.Entry)(ar[i])).getKey()));
assertTrue(map.containsValue(((Map.Entry)(ar[i])).getValue()));
}
}
/**
* values collection contains all values
*/
@Test public void testValues() {
ConcurrentMap map = map5();
Collection s = map.values();
assertEquals(5, s.size());
assertTrue(s.contains("A"));
assertTrue(s.contains("B"));
assertTrue(s.contains("C"));
assertTrue(s.contains("D"));
assertTrue(s.contains("E"));
}
/**
* entrySet contains all pairs
*/
@Test public void testEntrySet() {
ConcurrentMap map = map5();
Set s = map.entrySet();
assertEquals(5, s.size());
Iterator it = s.iterator();
while (it.hasNext()) {
Map.Entry e = (Map.Entry) it.next();
assertTrue(
(e.getKey().equals(one) && e.getValue().equals("A")) ||
(e.getKey().equals(two) && e.getValue().equals("B")) ||
(e.getKey().equals(three) && e.getValue().equals("C")) ||
(e.getKey().equals(four) && e.getValue().equals("D")) ||
(e.getKey().equals(five) && e.getValue().equals("E")));
}
}
/**
* putAll adds all key-value pairs from the given map
*/
@Test public void testPutAll() {
ConcurrentMap empty = makeMap();
ConcurrentMap map = map5();
empty.putAll(map);
assertEquals(5, empty.size());
assertTrue(empty.containsKey(one));
assertTrue(empty.containsKey(two));
assertTrue(empty.containsKey(three));
assertTrue(empty.containsKey(four));
assertTrue(empty.containsKey(five));
}
/**
* putIfAbsent works when the given key is not present
*/
@Test public void testPutIfAbsent() {
ConcurrentMap map = map5();
map.putIfAbsent(six, "Z");
assertTrue(map.containsKey(six));
}
/**
* putIfAbsent does not add the pair if the key is already present
*/
@Test public void testPutIfAbsent2() {
ConcurrentMap map = map5();
assertEquals("A", map.putIfAbsent(one, "Z"));
}
/**
* replace fails when the given key is not present
*/
@Test public void testReplace() {
ConcurrentMap map = map5();
assertNull(map.replace(six, "Z"));
assertFalse(map.containsKey(six));
}
/**
* replace succeeds if the key is already present
*/
@Test public void testReplace2() {
ConcurrentMap map = map5();
assertNotNull(map.replace(one, "Z"));
assertEquals("Z", map.get(one));
}
/**
* replace value fails when the given key not mapped to expected value
*/
@Test public void testReplaceValue() {
ConcurrentMap map = map5();
assertEquals("A", map.get(one));
assertFalse(map.replace(one, "Z", "Z"));
assertEquals("A", map.get(one));
}
/**
* replace value succeeds when the given key mapped to expected value
*/
@Test public void testReplaceValue2() {
ConcurrentMap map = map5();
assertEquals("A", map.get(one));
assertTrue(map.replace(one, "A", "Z"));
assertEquals("Z", map.get(one));
}
/**
* remove removes the correct key-value pair from the map
*/
@Test public void testRemove() {
ConcurrentMap map = map5();
map.remove(five);
assertEquals(4, map.size());
assertFalse(map.containsKey(five));
}
/**
* remove(key,value) removes only if pair present
*/
@Test public void testRemove2() {
ConcurrentMap map = map5();
map.remove(five, "E");
assertEquals(4, map.size());
assertFalse(map.containsKey(five));
map.remove(four, "A");
assertEquals(4, map.size());
assertTrue(map.containsKey(four));
}
/**
* size returns the correct values
*/
@Test public void testSize() {
ConcurrentMap map = map5();
ConcurrentMap empty = makeMap();
assertEquals(0, empty.size());
assertEquals(5, map.size());
}
// /**
// * toString contains toString of elements
// */
// @Test public void testToString() {
// ConcurrentMap map = map5();
// String s = map.toString();
// for (int i = 1; i <= 5; ++i) {
// assertTrue(s.contains(String.valueOf(i)));
// }
// }
//
/**
* get(null) throws NPE
*/
@Test public void testGet_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.get(null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* containsKey(null) throws NPE
*/
@Test public void testContainsKey_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.containsKey(null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* containsValue(null) throws NPE
*/
@Test public void testContainsValue_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.containsValue(null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* contains(null) throws NPE
*/
@Test public void testContains_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.containsKey(null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* put(null,x) throws NPE
*/
@Test public void testPut1_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.put(null, "whatever");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* put(x, null) throws NPE
*/
@Test public void testPut2_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.put("whatever", null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* putIfAbsent(null, x) throws NPE
*/
@Test public void testPutIfAbsent1_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.putIfAbsent(null, "whatever");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* replace(null, x) throws NPE
*/
@Test public void testReplace_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.replace(null, "whatever");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* replace(null, x, y) throws NPE
*/
@Test public void testReplaceValue_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.replace(null, one, "whatever");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* putIfAbsent(x, null) throws NPE
*/
@Test public void testPutIfAbsent2_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.putIfAbsent("whatever", null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* replace(x, null) throws NPE
*/
@Test public void testReplace2_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.replace("whatever", null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* replace(x, null, y) throws NPE
*/
@Test public void testReplaceValue2_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.replace("whatever", null, "A");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* replace(x, y, null) throws NPE
*/
@Test public void testReplaceValue3_NullPointerException() {
ConcurrentMap c = makeMap();
try {
c.replace("whatever", one, null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* remove(null) throws NPE
*/
@Test public void testRemove1_NullPointerException() {
ConcurrentMap c = makeGenericMap();
c.put("sadsdf", "asdads");
try {
c.remove(null);
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* remove(null, x) throws NPE
*/
@Test public void testRemove2_NullPointerException() {
ConcurrentMap c = makeGenericMap();
c.put("sadsdf", "asdads");
try {
c.remove(null, "whatever");
shouldThrow();
} catch (NullPointerException success) {}
}
/**
* remove(x, null) returns false
*/
@Test(expected = NullPointerException.class)
public void testRemove3() {
ConcurrentMap c = makeGenericMap();
c.put("sadsdf", "asdads");
c.remove("sadsdf", null);
}
//TODO serialization
// /**
// * A deserialized map equals original
// */
// @Test public void testSerialization() throws Exception {
// Map x = map5();
// Map y = serialClone(x);
//
// assertNotSame(x, y);
// assertEquals(x.size(), y.size());
// assertEquals(x, y);
// assertEquals(y, x);
// }
/**
* SetValue of an EntrySet entry sets value in the map.
*/
@Test public void testSetValueWriteThrough() {
// Adapted from a bug report by Eric Zoerner
ConcurrentMap map = makeGenericMap();
assertTrue(map.isEmpty());
for (int i = 0; i < 20; i++)
map.put(new Integer(i), new Integer(i));
assertFalse(map.isEmpty());
Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next();
// Unless it happens to be first (in which case remainder of
// test is skipped), remove a possibly-colliding key from map
// which, under some implementations, may cause entry1 to be
// cloned in map
if (!entry1.getKey().equals(new Integer(16))) {
map.remove(new Integer(16));
entry1.setValue("XYZ");
assertTrue(map.containsValue("XYZ")); // fails if write-through broken
}
}
}