cosmopolitan/test/libc/rand/devrand_test.c
2020-06-15 07:18:57 -07:00

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dce.h"
#include "libc/rand/rand.h"
#include "libc/str/str.h"
#include "libc/testlib/testlib.h"
TEST(devrand, test) {
if (IsWindows()) return;
const size_t kSize = 8;
void *A = tmalloc(kSize);
void *B = tmalloc(kSize);
memset(A, 0, kSize);
memset(B, 0, kSize);
EXPECT_EQ(0, devrand(A, kSize));
EXPECT_EQ(0, devrand(B, kSize));
EXPECT_BINNE(u"        ", A);
EXPECT_BINNE(u"        ", B);
EXPECT_NE(0, memcmp(A, B, kSize));
tfree(B);
tfree(A);
}