@Test
public void testHashCode() {

	{
		BitVectorImpl bv = new BitVectorImpl();
		Assert.assertEquals(0, bv.hashCode());
		bv.addBit(false);
		Assert.assertEquals(1, bv.hashCode());
	}
	{
		BitVectorImpl bv = new BitVectorImpl();
		Assert.assertEquals(0, bv.hashCode());
		bv.addBit(true);
		Assert.assertEquals(0x20, bv.hashCode());
	}
}