Examples of java.util.concurrent.ConcurrentNavigableMap

java.util.concurrent.ConcurrentNavigableMap
A {@link ConcurrentMap} supporting {@link NavigableMap} operations,and recursively so for its navigable sub-maps.
This interface is a member of the Java Collections Framework. @author Doug Lea @param < K> the type of keys maintained by this map @param < V> the type of mapped values @since 1.6


    /**
     *  isEmpty is true of empty map and false for non-empty
     */
    public void testIsEmpty() {
        ConcurrentNavigableMap empty = map0();
        ConcurrentNavigableMap map = map5();
        assertTrue(empty.isEmpty());
        assertFalse(map.isEmpty());
    }

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    /**
     *   firstKey returns first key
     */
    public void testFirstKey() {
        ConcurrentNavigableMap map = map5();
        assertEquals(one, map.firstKey());
    }

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    /**
     *   lastKey returns last key
     */
    public void testLastKey() {
        ConcurrentNavigableMap map = map5();
        assertEquals(five, map.lastKey());
    }

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    /**
     *   keySet returns a Set containing all the keys
     */
    public void testKeySet() {
        ConcurrentNavigableMap 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));

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    /**
     *   keySet is ordered
     */
    public void testKeySetOrder() {
        ConcurrentNavigableMap map = map5();
        Set s = map.keySet();
        Iterator i = s.iterator();
        Integer last = (Integer)i.next();
        assertEquals(last, one);
        while (i.hasNext()) {
            Integer k = (Integer)i.next();

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    /**
     * values collection contains all values
     */
    public void testValues() {
        ConcurrentNavigableMap 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"));

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    /**
     *  keySet.toArray returns contains all keys
     */
    public void testKeySetToArray() {
        ConcurrentNavigableMap 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)));

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    /**
     *  descendingkeySet.toArray returns contains all keys
     */
    public void testDescendingKeySetToArray() {
        ConcurrentNavigableMap map = map5();
        Set s = map.descendingKeySet();
        Object[] ar = s.toArray();
        assertEquals(5, ar.length);
        assertTrue(s.containsAll(Arrays.asList(ar)));
        ar[0] = m10;
        assertFalse(s.containsAll(Arrays.asList(ar)));

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    /**
     *  Values.toArray contains all values
     */
    public void testValuesToArray() {
        ConcurrentNavigableMap 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"));

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    /**
     * entrySet contains all pairs
     */
    public void testEntrySet() {
        ConcurrentNavigableMap 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(

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