/*
    Copyright (C) 2009 William Hart

    This file is part of FLINT.

    FLINT is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.  See <https://www.gnu.org/licenses/>.
*/

#include "test_helpers.h"
#include "gmpcompat.h"
#include "ulong_extras.h"

TEST_FUNCTION_START(n_is_probabprime_lucas, state)
{
    int i, result;
    ulong count = UWORD(0);
    mp_limb_t d;
    mpz_t d_m;
    slong test_multiplier;

    test_multiplier = FLINT_MAX(1, flint_test_multiplier());

    for (i = 0; i < 10000 * test_multiplier; i++) /* Test that primes pass the test */
    {
        mpz_init(d_m);

        do
        {
            d = n_randtest_not_zero(state);
            flint_mpz_set_ui(d_m, d);
            mpz_nextprime(d_m, d_m);
            d = flint_mpz_get_ui(d_m);
        } while (mpz_size(d_m) > 1);

        result = n_is_probabprime_lucas(d);
        if (!result)
            TEST_FUNCTION_FAIL("d = %wu is declared composite\n", d);

        mpz_clear(d_m);
    }

    for (i = 0; i < 10000 * test_multiplier; i++) /* Test that not too many composites pass */
    {
        mpz_init(d_m);

        do
        {
            d = n_randtest(state);
            flint_mpz_set_ui(d_m, d);
        } while (mpz_probab_prime_p(d_m, 12));

        if (n_is_probabprime_lucas(d) == 1) count++;

        mpz_clear(d_m);
    }

    result = (count < 20 * test_multiplier);
    if (!result)
        TEST_FUNCTION_FAIL("%wu composites declared prime\n", count);

    TEST_FUNCTION_END(state);
}
