File

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>
date Tue, 08 Jun 2021 00:58:27 +0200
parent 8450:3a9a3d90c44c
line wrap: on
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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);