Software /
code /
prosody
File
spec/net_resolvers_service_spec.lua @ 13039:9ddb344b9fab
util.human.io: Allow defining per column ellipsis function
As an alternative to doing it in the mapper function. Could be useful in
cases where one may want to put the ellipsis in the middle or beginning
instead of the start.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Fri, 07 Apr 2023 13:00:58 +0200 |
parent | 12401:c029ddcad258 |
line wrap: on
line source
local set = require "util.set"; insulate("net.resolvers.service", function () local adns = { resolver = function () return { lookup = function (_, cb, qname, qtype, qclass) if qname == "_xmpp-server._tcp.example.com" and (qtype or "SRV") == "SRV" and (qclass or "IN") == "IN" then cb({ { -- 60+35+60 srv = { target = "xmpp0-a.example.com", port = 5228, priority = 0, weight = 60 }; }; { srv = { target = "xmpp0-b.example.com", port = 5216, priority = 0, weight = 35 }; }; { srv = { target = "xmpp0-c.example.com", port = 5200, priority = 0, weight = 0 }; }; { srv = { target = "xmpp0-d.example.com", port = 5256, priority = 0, weight = 120 }; }; { srv = { target = "xmpp1-a.example.com", port = 5273, priority = 1, weight = 30 }; }; { srv = { target = "xmpp1-b.example.com", port = 5274, priority = 1, weight = 30 }; }; { srv = { target = "xmpp2.example.com", port = 5275, priority = 2, weight = 0 }; }; }); elseif qname == "_xmpp-server._tcp.single.example.com" and (qtype or "SRV") == "SRV" and (qclass or "IN") == "IN" then cb({ { srv = { target = "xmpp0-a.example.com", port = 5269, priority = 0, weight = 0 }; }; }); elseif qname == "_xmpp-server._tcp.half.example.com" and (qtype or "SRV") == "SRV" and (qclass or "IN") == "IN" then cb({ { srv = { target = "xmpp0-a.example.com", port = 5269, priority = 0, weight = 0 }; }; { srv = { target = "xmpp0-b.example.com", port = 5270, priority = 0, weight = 1 }; }; }); elseif qtype == "A" then local l = qname:match("%-(%a)%.example.com$") or "1"; local d = ("%d"):format(l:byte()) cb({ { a = "127.0.0."..d; }; }); elseif qtype == "AAAA" then local l = qname:match("%-(%a)%.example.com$") or "1"; local d = ("%04d"):format(l:byte()) cb({ { aaaa = "fdeb:9619:649e:c7d9::"..d; }; }); else cb(nil); end end; }; end; }; package.loaded["net.adns"] = mock(adns); local resolver = require "net.resolvers.service"; math.randomseed(os.time()); it("works for 99% of deployments", function () -- Most deployments only have a single SRV record, let's make -- sure that works okay local expected_targets = set.new({ -- xmpp0-a "tcp4 127.0.0.97 5269"; "tcp6 fdeb:9619:649e:c7d9::0097 5269"; }); local received_targets = set.new({}); local r = resolver.new("single.example.com", "xmpp-server"); local done = false; local function handle_target(...) if ... == nil then done = true; -- No more targets return; end received_targets:add(table.concat({ ... }, " ", 1, 3)); end r:next(handle_target); while not done do r:next(handle_target); end -- We should have received all expected targets, and no unexpected -- ones: assert.truthy(set.xor(received_targets, expected_targets):empty()); end); it("supports A/AAAA fallback", function () -- Many deployments don't have any SRV records, so we should -- fall back to A/AAAA records instead when that is the case local expected_targets = set.new({ -- xmpp0-a "tcp4 127.0.0.97 5269"; "tcp6 fdeb:9619:649e:c7d9::0097 5269"; }); local received_targets = set.new({}); local r = resolver.new("xmpp0-a.example.com", "xmpp-server", "tcp", { default_port = 5269 }); local done = false; local function handle_target(...) if ... == nil then done = true; -- No more targets return; end received_targets:add(table.concat({ ... }, " ", 1, 3)); end r:next(handle_target); while not done do r:next(handle_target); end -- We should have received all expected targets, and no unexpected -- ones: assert.truthy(set.xor(received_targets, expected_targets):empty()); end); it("works", function () local expected_targets = set.new({ -- xmpp0-a "tcp4 127.0.0.97 5228"; "tcp6 fdeb:9619:649e:c7d9::0097 5228"; "tcp4 127.0.0.97 5273"; "tcp6 fdeb:9619:649e:c7d9::0097 5273"; -- xmpp0-b "tcp4 127.0.0.98 5274"; "tcp6 fdeb:9619:649e:c7d9::0098 5274"; "tcp4 127.0.0.98 5216"; "tcp6 fdeb:9619:649e:c7d9::0098 5216"; -- xmpp0-c "tcp4 127.0.0.99 5200"; "tcp6 fdeb:9619:649e:c7d9::0099 5200"; -- xmpp0-d "tcp4 127.0.0.100 5256"; "tcp6 fdeb:9619:649e:c7d9::0100 5256"; -- xmpp2 "tcp4 127.0.0.49 5275"; "tcp6 fdeb:9619:649e:c7d9::0049 5275"; }); local received_targets = set.new({}); local r = resolver.new("example.com", "xmpp-server"); local done = false; local function handle_target(...) if ... == nil then done = true; -- No more targets return; end received_targets:add(table.concat({ ... }, " ", 1, 3)); end r:next(handle_target); while not done do r:next(handle_target); end -- We should have received all expected targets, and no unexpected -- ones: assert.truthy(set.xor(received_targets, expected_targets):empty()); end); it("balances across weights correctly #slow", function () -- This mimics many repeated connections to 'example.com' (mock -- records defined above), and records the port number of the -- first target. Therefore it (should) only return priority -- 0 records, and the input data is constructed such that the -- last two digits of the port number represent the percentage -- of times that record should (on average) be picked first. -- To prevent random test failures, we test across a handful -- of fixed (randomly selected) seeds. for _, seed in ipairs({ 8401877, 3943829, 7830992 }) do math.randomseed(seed); local results = {}; local function run() local run_results = {}; local r = resolver.new("example.com", "xmpp-server"); local function record_target(...) if ... == nil then -- No more targets return; end run_results = { ... }; end r:next(record_target); return run_results[3]; end for _ = 1, 1000 do local port = run(); results[port] = (results[port] or 0) + 1; end local ports = {}; for port in pairs(results) do table.insert(ports, port); end table.sort(ports); for _, port in ipairs(ports) do --print("PORT", port, tostring((results[port]/1000) * 100).."% hits (expected "..tostring(port-5200).."%)"); local hit_pct = (results[port]/1000) * 100; local expected_pct = port - 5200; --print(hit_pct, expected_pct, math.abs(hit_pct - expected_pct)); assert.is_true(math.abs(hit_pct - expected_pct) < 5); end --print("---"); end end); end);