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prosody
File
spec/util_throttle_spec.lua @ 11936:3f49c35607ca
mod_smacks: Fix timer lifetimes to follow session instead of module
module:add_timer() creates a timer that stops working after the module
is reloaded or unloaded, in order to prevent leaks. However, when the
timers control vital session behavior, breakage occurs after reload.
E.g. sessions would stop requesting acks and stop responding to acks.
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 24 Nov 2021 21:27:45 +0100 |
parent | 9993:02a41315d275 |
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-- Mock util.time local now = 0; -- wibbly-wobbly... timey-wimey... stuff local function later(n) now = now + n; -- time passes at a different rate end package.loaded["util.time"] = { now = function() return now; end } local throttle = require "util.throttle"; describe("util.throttle", function() describe("#create()", function() it("should be created with correct values", function() now = 5; local a = throttle.create(3, 10); assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 }); local a = throttle.create(3, 5); assert.same(a, { balance = 3, max = 3, rate = 0.6, t = 5 }); local a = throttle.create(1, 1); assert.same(a, { balance = 1, max = 1, rate = 1, t = 5 }); local a = throttle.create(10, 10); assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 }); local a = throttle.create(10, 1); assert.same(a, { balance = 10, max = 10, rate = 10, t = 5 }); end); end); describe("#update()", function() it("does nothing when no time has passed, even if balance is not full", function() now = 5; local a = throttle.create(10, 10); for i=1,5 do a:update(); assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 }); end a.balance = 0; for i=1,5 do a:update(); assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 }); end end); it("updates only time when time passes but balance is full", function() now = 5; local a = throttle.create(10, 10); for i=1,5 do later(5); a:update(); assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 + i*5 }); end end); it("updates balance when balance has room to grow as time passes", function() now = 5; local a = throttle.create(10, 10); a.balance = 0; assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 }); later(1); a:update(); assert.same(a, { balance = 1, max = 10, rate = 1, t = 6 }); later(3); a:update(); assert.same(a, { balance = 4, max = 10, rate = 1, t = 9 }); later(10); a:update(); assert.same(a, { balance = 10, max = 10, rate = 1, t = 19 }); end); it("handles 10 x 0.1s updates the same as 1 x 1s update ", function() now = 5; local a = throttle.create(1, 1); a.balance = 0; later(1); a:update(); assert.same(a, { balance = 1, max = 1, rate = 1, t = now }); a.balance = 0; for i=1,10 do later(0.1); a:update(); end assert(math.abs(a.balance - 1) < 0.0001); -- incremental updates cause rounding errors end); end); -- describe("po") describe("#poll()", function() it("should only allow successful polls until cost is hit", function() now = 5; local a = throttle.create(3, 10); assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 }); assert.is_true(a:poll(1)); -- 3 -> 2 assert.same(a, { balance = 2, max = 3, rate = 0.3, t = 5 }); assert.is_true(a:poll(2)); -- 2 -> 1 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 }); assert.is_false(a:poll(1)); -- MEEP, out of credits! assert.is_false(a:poll(1)); -- MEEP, out of credits! assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 }); end); it("should not allow polls more than the cost", function() now = 0; local a = throttle.create(10, 10); assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 }); assert.is_false(a:poll(11)); assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 }); assert.is_true(a:poll(6)); assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 }); assert.is_false(a:poll(5)); assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 }); -- fractional assert.is_true(a:poll(3.5)); assert.same(a, { balance = 0.5, max = 10, rate = 1, t = 0 }); assert.is_true(a:poll(0.25)); assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 }); assert.is_false(a:poll(0.3)); assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 }); assert.is_true(a:poll(0.25)); assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 }); assert.is_false(a:poll(0.1)); assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 }); assert.is_true(a:poll(0)); assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 }); end); end); end);