/** lowerEntry returns preceding entry. */
public void testDescendingLowerEntry() {
ConcurrentNavigableMap map = dmap5();
Map.Entry e1 = map.lowerEntry(m3);
assertEquals(m2, e1.getKey());
Map.Entry e2 = map.lowerEntry(m6);
assertEquals(m5, e2.getKey());
Map.Entry e3 = map.lowerEntry(m1);
assertNull(e3);
Map.Entry e4 = map.lowerEntry(zero);
assertNull(e4);
}
/** lowerEntry returns preceding entry. */
public void testLowerEntry() {
ConcurrentNavigableMap map = map5();
Map.Entry e1 = map.lowerEntry(three);
assertEquals(two, e1.getKey());
Map.Entry e2 = map.lowerEntry(six);
assertEquals(five, e2.getKey());
Map.Entry e3 = map.lowerEntry(one);
assertNull(e3);
Map.Entry e4 = map.lowerEntry(zero);
assertNull(e4);
}