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spec/util_bitcompat_spec.lua @ 12446:e54b8a5e35ad 0.12
util.random: Test whether util.crand works before using it (fix #1734)
util.crand can be configured at compile time to use the Linux
getrandom() system call, available from Linux 3.17, but it is still
possible to load it with an older kernel lacking that system call, where
attempting to use it throws an ENOSYS error.
By testing for this on load we can fall back to /dev/urandom in this
case.
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 02 Apr 2022 16:33:27 +0200 |
parent | 12366:c640717e01ca |
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describe("util.bitcompat", function () -- bitcompat will pass through to an appropriate implementation. Our -- goal here is to check that whatever implementation is in use passes -- these basic sanity checks. local bit = require "util.bitcompat"; it("bor works", function () assert.equal(0xF0FF, bit.bor(0xF000, 0x00F0, 0x000F)); end); it("band works", function () assert.equal(0x0F, bit.band(0xFF, 0x1F, 0x0F)); end); it("bxor works", function () assert.equal(0x13, bit.bxor(0x10, 0x0F, 0x0C)); end); it("rshift works", function () assert.equal(0x0F, bit.rshift(0xFF, 4)); end); it("lshift works", function () assert.equal(0xFF00, bit.lshift(0xFF, 8)); end); end);