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/*
Copyright (C) 2010 Fredrik Johansson
Copyright (C) 2024 Albin Ahlbäck
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 "ulong_extras.h"
TEST_FUNCTION_START(n_euler_phi, state)
{
slong ix;
int result;
for (ix = 0; ix < 100 * flint_test_multiplier(); ix++)
{
ulong nx, kx;
ulong r1, r2;
nx = n_randbits(state, n_randint(state, 18));
r1 = 0;
for (kx = 1; kx <= nx; kx++)
r1 += (n_gcd(nx, kx) == 1);
r2 = n_euler_phi(nx);
result = (r1 == r2);
if (!result)
TEST_FUNCTION_FAIL(
"phi(%wu) = %wu, got %wu\n",
nx, r1, r2);
}
TEST_FUNCTION_END(state);
}