diff options
Diffstat (limited to 'spec/util_throttle_spec.lua')
| -rw-r--r-- | spec/util_throttle_spec.lua | 142 |
1 files changed, 131 insertions, 11 deletions
diff --git a/spec/util_throttle_spec.lua b/spec/util_throttle_spec.lua index a588e262..ed4d810b 100644 --- a/spec/util_throttle_spec.lua +++ b/spec/util_throttle_spec.lua @@ -12,19 +12,139 @@ package.loaded["util.time"] = { local throttle = require "util.throttle"; -describe("util.sasl.scram", function() - describe("#Hi()", function() - it("should work", function() +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 }); - assert.are.equal(a:poll(1), true); -- 3 -> 2 - assert.are.equal(a:poll(1), true); -- 2 -> 1 - assert.are.equal(a:poll(1), true); -- 1 -> 0 - assert.are.equal(a:poll(1), false); -- MEEP, out of credits! - later(1); -- ... what about - assert.are.equal(a:poll(1), false); -- now? - Still no! - later(9); -- Later that day - assert.are.equal(a:poll(1), true); -- Should be back at 3 credits ... 2 + 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 hase 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 rouding 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); |