Method testPoll

src/test/java/org/mapdb/BTreeSet3Test.java:225–231

()

     * poll succeeds unless empty
     */
    public void testPoll() {
        NavigableSet q = populatedSet(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(i, q.pollFirst());
        }
        assertNull(q.pollFirst());
    }

    /*
     * remove(x) removes x and returns true if present