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author | Bruno Haible <bruno@clisp.org> | 2012-01-14 15:22:49 +0100 |
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committer | Bruno Haible <bruno@clisp.org> | 2012-01-14 15:24:25 +0100 |
commit | b61b62a2fd3a660a0a22b083a2b90a8f0e738b27 (patch) | |
tree | ed355612bc67ae88f33703ed73a6e666d5c2f771 /tests/test-random.c | |
parent | e2ee61c4fa5854e218eaeedef1dcedf26e965fba (diff) | |
download | gnulib-b61b62a2fd3a660a0a22b083a2b90a8f0e738b27.tar.gz |
Tests for module 'random'.
* modules/random-tests: New file.
* tests/test-random.c: New file, based on tests/test-random_r.c.
Diffstat (limited to 'tests/test-random.c')
-rw-r--r-- | tests/test-random.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tests/test-random.c b/tests/test-random.c new file mode 100644 index 0000000000..9a36d5667c --- /dev/null +++ b/tests/test-random.c @@ -0,0 +1,49 @@ +/* Test random. + Copyright (C) 2008-2012 Free Software Foundation, Inc. + + 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; either version 3 of the License, or + (at your option) any later version. + + 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, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +#include <stdlib.h> + +#include "signature.h" +SIGNATURE_CHECK (srandom, void, (unsigned int)); +SIGNATURE_CHECK (initstate, char *, (unsigned int, char *, size_t)); +SIGNATURE_CHECK (setstate, char *, (char *)); +SIGNATURE_CHECK (random, long, (void)); + +#include <time.h> + +#include "macros.h" + +int +main () +{ + char buf[128]; + unsigned int i; + unsigned int n_big = 0; + + initstate (time (NULL), buf, sizeof buf); + for (i = 0; i < 1000; i++) + { + long r = random (); + ASSERT (0 <= r); + if (RAND_MAX / 2 < r) + ++n_big; + } + + /* Fail if none of the numbers were larger than RAND_MAX / 2. */ + return !n_big; +} |