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spec/util_random_spec.lua @ 11593:0db763f3f3be
util.openmetrics: Prettify format of histogram buckets
"%g" turns 1GB into 1.07374e+09, which is a bit awkward for the bytes
measurements IMO. Turning up the precision, at "%.17g" turns 0.1 into
0.10000000000000001 while "%0.16" gives 0.1, hiding most of those pesky
floating point artefacts. Lua version 5.2 uses "%.14g" ( see
LUA_NUMBER_FMT in luaconf.h.html ) so it seems like a sensible choice
here.
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 08 Jun 2021 00:58:27 +0200 |
parent | 8450:3a9a3d90c44c |
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local random = require "util.random"; describe("util.random", function() describe("#bytes()", function() it("should return a string", function() assert.is_string(random.bytes(16)); end); it("should return the requested number of bytes", function() -- Makes no attempt at testing how random the bytes are, -- just that it returns the number of bytes requested for i = 1, 20 do assert.are.equal(2^i, #random.bytes(2^i)); end end); end); end);