@Test
public void testClear() {
BitSet bitSet = new BitSet(NUM_BITS);
for (int i = 0; i < NUM_BITS; i++) {
bitSet.set(i);
}
for (int i = 0; i < NUM_BITS; i++) {
assertTrue(bitSet.get(i));
}
bitSet.clear();
for (int i = 0; i < NUM_BITS; i++) {
assertFalse(bitSet.get(i));
}
}
@Test
public void testCardinality() {
BitSet bitSet = new BitSet(NUM_BITS);
assertEquals(0, bitSet.cardinality());
bitSet.set(0);
assertEquals(1, bitSet.cardinality());
bitSet.set(0);
assertEquals(1, bitSet.cardinality());
bitSet.set(1);
assertEquals(2, bitSet.cardinality());
bitSet.set(63);
assertEquals(3, bitSet.cardinality());
bitSet.set(64);
assertEquals(4, bitSet.cardinality());
bitSet.set(NUM_BITS - 1);
assertEquals(5, bitSet.cardinality());
bitSet.clear(0);
assertEquals(4, bitSet.cardinality());
}
