diff options
| author |   Kerin Millar <kfm@plushkava.net> | 2024-06-02 18:46:43 +0100 |
|---|---|---|
| committer | Kerin Millar <kfm@plushkava.net> | 2024-06-12 08:06:41 +0100 |
| commit | 5ee035a364bea8d12bc8abfe769014e230a212a6 (patch) | |
| tree | 0d16021306fa59a378f27386ee31d813aaf6167f /test-functions | |
| parent | Add the warn() function (diff) | |
| download | gentoo-functions-5ee035a364bea8d12bc8abfe769014e230a212a6.tar.gz gentoo-functions-5ee035a364bea8d12bc8abfe769014e230a212a6.tar.bz2 gentoo-functions-5ee035a364bea8d12bc8abfe769014e230a212a6.zip | |
Add the srandom() function
This is based on the behaviour of the special SRANDOM variable in bash.
It should be noted that sh is capable of bitwise arithmetic. For
instance, it is possible to clamp the number in such a way that it does
not exceed the minimum possible value of RAND_MAX (32767).
n=$(srandom) && : $(( n >>= 17 ))
Signed-off-by: Kerin Millar <kfm@plushkava.net>
Diffstat (limited to 'test-functions')
| -rwxr-xr-x | test-functions | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test-functions b/test-functions index 8ff6380..0c4a222 100755 --- a/test-functions +++ b/test-functions @@ -397,6 +397,27 @@ test_yesno() { iterate_tests 3 "$@" } +test_srandom() { + set -- \ + eq 0 \ + eq 0 \ + eq 0 \ + eq 0 \ + eq 0 + + row=0 + + callback() { + number=$(srandom) + test_description="srandom ($(( row += 1 ))/5: ${number:-blank})" + is_int "${number}" \ + && test "${number}" -ge 0 \ + && test "${number}" -le 4294967295 + } + + iterate_tests 2 "$@" +} + iterate_tests() { slice_width=$1 shift @@ -457,6 +478,7 @@ test_is_visible || rc=1 test_yesno || rc=1 test_die || rc=1 test_edo || rc=1 +test_srandom || rc=1 cleanup_tmpdir |