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Justine Tunney 2020-06-15 07:18:57 -07:00
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test/libc/rand/rand_test.c Normal file
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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/rand/rand.h"
#include "libc/testlib/testlib.h"
TEST(rand002, alwaysReturnsPositiveNumbers) {
for (unsigned i = 0; i < 100; ++i) {
ASSERT_GT(rand(), 0);
}
}
TEST(rand003, srandSmokeTest) {
srand(1);
ASSERT_EQ(908834774, rand());
srand(1);
ASSERT_EQ(908834774, rand());
srand(7);
ASSERT_EQ(1059165278, rand());
}
TEST(rand004, rand32SmokeTest) {
ASSERT_TRUE(rand32() != rand32() || rand32() != rand32() ||
rand32() != rand32() || rand32() != rand32());
}
TEST(rand005, rand64SmokeTest) {
ASSERT_TRUE(rand64() != rand64() || rand64() != rand64());
}