Examples of java.util.TreeMap.higherEntry()

        assertEquals(tm.floorKey(key), treeMap.floorKey(key));
        assertEquals(tm.floorEntry(key), treeMap.floorEntry(key));
        assertEquals(tm.lowerKey(key), treeMap.lowerKey(key));
        assertEquals(tm.lowerEntry(key), treeMap.lowerEntry(key));
        assertEquals(tm.higherKey(key), treeMap.higherKey(key));
        assertEquals(tm.higherEntry(key), treeMap.higherEntry(key));
        assertEquals(tm.entrySet(), treeMap.entrySet());
    }


    public void test_TreeMap_Constructor_SortedMap() {
        TreeMap treeMap = new TreeMap(subMap_default);

        }
        assertNull(treeMap.floorEntry(1));
        assertNull(treeMap.lowerKey(1));
        assertNull(treeMap.lowerEntry(1));
        assertNull(treeMap.higherKey(1));
        assertNull(treeMap.higherEntry(1));
        assertFalse(treeMap.containsKey(1));
        assertFalse(treeMap.containsValue(1));
        assertNull(treeMap.get(1));


        assertNull(treeMap.pollFirstEntry());

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