assertNotNull(ResolverType.RESOLVER_BCAST, "RESOLVER_BCAST should not be null.");
        assertNotNull(ResolverType.RESOLVER_DNS, "RESOLVER_DNS should not be null.");
        assertNotNull(ResolverType.RESOLVER_LMHOSTS, "RESOLVER_LMHOSTS should not be null.");
    }

    /**
     * Tests the total number of enum constants.
     */
    @Test
    void testNumberOfEnumConstants() {
        // Ensure there are exactly 4 resolver types

    RESOLVER_WINS,

    /**
     * NETBIOS broadcast
     */
    RESOLVER_BCAST,

    /**
     * DNS
     */
    RESOLVER_DNS,

    /**
     * LMHosts file lookup
     */
    RESOLVER_LMHOSTS