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/*
Copyright (C) 2020 Fredrik Johansson
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 "fmpz_poly.h"
TEST_FUNCTION_START(fmpz_poly_is_cyclotomic, state)
{
int i;
/* Check detection of small cyclotomics */
for (i = 0; i < 250; i++)
{
fmpz_poly_t f;
ulong n, r;
n = i;
fmpz_poly_init(f);
fmpz_poly_cyclotomic(f, n);
r = fmpz_poly_is_cyclotomic(f);
if (r != n)
{
flint_printf("FAIL\n");
fmpz_poly_print(f); flint_printf("\n\n");
flint_printf("%wu %wu\n\n", n, r);
fflush(stdout);
flint_abort();
}
fmpz_poly_clear(f);
}
/* Check detection of large cyclotomics */
for (i = 0; i < 10 * flint_test_multiplier(); i++)
{
fmpz_poly_t f;
ulong n, r;
n = n_randtest(state) % 10000;
fmpz_poly_init(f);
fmpz_poly_cyclotomic(f, n);
r = fmpz_poly_is_cyclotomic(f);
if (r != n)
{
flint_printf("FAIL\n");
fmpz_poly_print(f); flint_printf("\n\n");
flint_printf("%wu %wu\n\n", n, r);
fflush(stdout);
flint_abort();
}
fmpz_poly_clear(f);
}
/* Check cyclotomic + random polynomial */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_poly_t f, g;
ulong n;
fmpz_poly_init(f);
fmpz_poly_init(g);
fmpz_poly_cyclotomic(f, 1 + n_randint(state, 100));
fmpz_poly_randtest(g, state, 1 + n_randint(state, 50), 1);
fmpz_poly_add(f, f, g);
n = fmpz_poly_is_cyclotomic(f);
if (n != 0)
{
fmpz_poly_cyclotomic(g, n);
if (!fmpz_poly_equal(f, g))
{
flint_printf("FAIL\n");
fmpz_poly_print(f); flint_printf("\n\n");
fmpz_poly_print(g); flint_printf("\n\n");
flint_printf("%wu\n\n", n);
fflush(stdout);
flint_abort();
}
}
fmpz_poly_clear(f);
fmpz_poly_clear(g);
}
TEST_FUNCTION_END(state);
}