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spec/util_throttle_spec.lua @ 12983:4533c9b906b0
util.format: Tweak serialization of %q formatted entries
Improves serialization of function references especially, the built-in
default handling of that in util.serialization is not the most
informative. Now, along with the function metatable from util.startup,
the actual function can be found by filename and line number.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 26 Mar 2023 00:18:05 +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);