lib/animation_node.lua

@@ -1,5 +1,6 @@
 local easing = require "lib.utils.easing"
 
+--- @alias voidCallback fun(): nil
 --- @alias animationRunner fun(node: AnimationNode)
 
 --- Узел дерева анимаций.
@@ -22,7 +23,6 @@ local easing = require "lib.utils.easing"
 ---         }
 ---     }:run()
 --- ```
---- @deprecated
 --- @class AnimationNode
 --- @field count integer
 --- @field run animationRunner
@@ -73,7 +73,6 @@ function animation:update(dt)
     end
 end
 
---- @deprecated
 --- @param data {[1]: animationRunner?, onEnd?: voidCallback, duration: number?, easing: ease?, children?: AnimationNode[]}
 --- @return AnimationNode
 local function new(data)

lib/annotations.lua

@@ -8,6 +8,3 @@ Tree.behaviors.light           = require "character.behaviors.light"
 Tree.behaviors.positioned      = require "character.behaviors.positioned"
 Tree.behaviors.tiled           = require "character.behaviors.tiled"
 Tree.behaviors.cursor          = require "character.behaviors.cursor"
-Tree.behaviors.ai              = require "lib.character.behaviors.ai"
-
---- @alias voidCallback fun(): nil

lib/character/behaviors/ai.lua

@@ -1,59 +0,0 @@
-local AnimationNode = require "lib.animation_node"
-local easing        = require "lib.utils.easing"
-
-local function closestCharacter(char)
-    local caster = Vec3 {}
-    char:try(Tree.behaviors.positioned, function(b)
-        caster = b.position
-    end)
-    local charTarget
-    local minDist = 88005553535 -- spooky magic number
-    for k, v in pairs(Tree.level.characters) do
-        v:try(Tree.behaviors.positioned, function(b)
-            local dist = ((caster.x - b.position.x) ^ 2 + (caster.y - b.position.y) ^ 2) ^ 0.5
-            if dist < minDist and dist ~= 0 then
-                minDist = dist
-                charTarget = v
-            end
-            -- print(k, b.position)
-        end)
-    end
-    return charTarget
-end
-
---- @class AIBehavior : Behavior
---- @field animationNode AnimationNode?
---- @field target Vec3?
-local behavior = {}
-behavior.__index = behavior
-behavior.id = "ai"
-
-function behavior.new()
-    return setmetatable({}, behavior)
-end
-
---- @return Task<nil>
-function behavior:makeTurn()
-    return function(callback) -- почему так, описано в Task
-        self.owner:try(Tree.behaviors.spellcaster, function(spellB)
-            local charTarget = closestCharacter(self.owner)
-            charTarget:try(Tree.behaviors.positioned, function(b)
-                self.target = Vec3 { b.position.x, b.position.y + 1 } --- @todo тут захардкожено + 1, но мы должны как-то хитро определять с какой стороны обойти
-            end)
-
-            spellB.spellbook[1]:cast(self.owner, self.target)(function()
-                -- здесь мы оказываемся после того, как сходили в первый раз
-                print("[AI]: finished move 1")
-                local newTarget = Vec3 { 1, 1 }
-                -- поэтому позиция персонажа для нового каста пересчитается динамически
-                spellB.spellbook[1]:cast(self.owner, newTarget)(function()
-                    print("[AI]: finished move 2")
-                    -- дергаем функцию после завершения хода
-                    callback()
-                end)
-            end)
-        end)
-    end
-end
-
-return behavior

lib/character/behaviors/light.lua

@@ -1,17 +1,13 @@
-local AnimationNode = require "lib.animation_node"
-local easing        = require "lib.utils.easing"
-
 --- @class LightBehavior : Behavior
 --- @field intensity number
 --- @field color Vec3
 --- @field seed integer
 --- @field colorAnimationNode? AnimationNode
---- @field private animateColorCallback? fun(): nil
 --- @field targetColor? Vec3
 --- @field sourceColor? Vec3
-local behavior      = {}
-behavior.__index    = behavior
-behavior.id         = "light"
+local behavior = {}
+behavior.__index = behavior
+behavior.id = "light"
 
 ---@param values {intensity: number?, color: Vec3?, seed: integer?}
 ---@return LightBehavior
@@ -30,24 +26,11 @@ function behavior:update(dt)
     self.colorAnimationNode:update(dt)
 end
 
---- @TODO: refactor
-function behavior:animateColor(targetColor)
+function behavior:animateColor(targetColor, animationNode)
     if self.colorAnimationNode then self.colorAnimationNode:finish() end
-    self.colorAnimationNode = AnimationNode {
-        function(_) end,
-        easing = easing.easeInQuad,
-        duration = 800,
-        onEnd = function()
-            if self.animateColorCallback then self.animateColorCallback() end
-        end
-    }
-    self.colorAnimationNode:run()
+    self.colorAnimationNode = animationNode
     self.sourceColor = self.color
     self.targetColor = targetColor
-
-    return function(callback)
-        self.animateColorCallback = callback
-    end
 end
 
 function behavior:draw()

lib/character/behaviors/residentsleeper.lua

@@ -1,37 +1,21 @@
 --- Умеет асинхронно ждать какое-то время (для анимаций)
 --- @class ResidentSleeperBehavior : Behavior
---- @field private t0 number?
---- @field private sleepTime number?
---- @field private callback voidCallback?
---- @field private state 'running' | 'finished'
+--- @field animationNode? AnimationNode
 local behavior = {}
 behavior.__index = behavior
 behavior.id = "residentsleeper"
 
 function behavior.new() return setmetatable({}, behavior) end
 
-function behavior:update(_)
-    if self.state ~= 'running' then return end
-
-    local t = love.timer.getTime()
-    if t >= self.t0 + self.sleepTime then
-        self.state = 'finished'
-        self.callback()
-    end
+function behavior:update(dt)
+    if not self.animationNode then return end
+    self.animationNode:update(dt)
 end
 
---- @return Task<nil>
-function behavior:sleep(ms)
-    self.sleepTime = ms / 1000
-    return function(callback)
-        if self.state == 'running' then
-            self.callback()
-        end
-
-        self.t0 = love.timer.getTime()
-        self.callback = callback
-        self.state = 'running'
-    end
+--- @param node AnimationNode
+function behavior:sleep(node)
+    if self.animationNode then self.animationNode:finish() end
+    self.animationNode = node
 end
 
 return behavior

lib/character/behaviors/sprite.lua

@@ -69,20 +69,17 @@ function sprite:draw()
     )
 end
 
---- @return Task<nil>
-function sprite:animate(state)
-    return function(callback)
-        if not self.animationGrid[state] then
-            print("[SpriteBehavior]: no animation for '" .. state .. "'")
-            callback()
-        end
-        self.animationTable[state] = anim8.newAnimation(self.animationGrid[state], self.ANIMATION_SPEED,
-            function()
-                self:loop("idle")
-                callback()
-            end)
-        self.state = state
+--- @param node AnimationNode
+function sprite:animate(state, node)
+    if not self.animationGrid[state] then
+        return print("[SpriteBehavior]: no animation for '" .. state .. "'")
     end
+    self.animationTable[state] = anim8.newAnimation(self.animationGrid[state], self.ANIMATION_SPEED,
+        function()
+            self:loop("idle")
+            node:finish()
+        end)
+    self.state = state
 end
 
 function sprite:loop(state)

lib/character/behaviors/tiled.lua

@@ -5,7 +5,7 @@ local utils = require "lib.utils.utils"
 --- @field private runSource? Vec3 точка, из которой бежит персонаж
 --- @field private runTarget? Vec3 точка, в которую в данный момент бежит персонаж
 --- @field private path? Deque путь, по которому сейчас бежит персонаж
---- @field private followPathCallback? fun()
+--- @field private animationNode? AnimationNode AnimationNode, с которым связана анимация перемещения
 --- @field private t0 number время начала движения
 --- @field size Vec3
 local behavior = {}
@@ -20,8 +20,10 @@ function behavior.new(size)
 end
 
 --- @param path Deque
---- @return Task<nil>
-function behavior:followPath(path)
+--- @param animationNode AnimationNode
+function behavior:followPath(path, animationNode)
+    if path:is_empty() then return animationNode:finish() end
+    self.animationNode = animationNode
     self.owner:try(Tree.behaviors.sprite, function(sprite)
         sprite:loop("run")
     end)
@@ -30,10 +32,6 @@ function behavior:followPath(path)
     local nextCell = path:peek_front()
     self:runTo(nextCell)
     path:pop_front()
-
-    return function(callback)
-        self.followPathCallback = callback
-    end
 end
 
 --- @param target Vec3
@@ -74,10 +72,7 @@ function behavior:update(dt)
                     sprite:loop("idle")
                 end)
                 self.runTarget = nil
-
-                if self.followPathCallback then
-                    self.followPathCallback()
-                end
+                if self.animationNode then self.animationNode:finish() end
             end
         else                                                                           -- анимация перемещения не завершена
             positioned.position = utils.lerp(self.runSource, self.runTarget, fraction) -- линейный интерполятор

lib/level/selector.lua

@@ -37,16 +37,9 @@ function selector:update(dt)
                 if not selectedId then self:select(nil) end
                 return
             end
-            local task = b.cast:cast(char, mousePosition) -- в task функция, которая запускает анимацию спелла
-            if task then
+            if b.cast:cast(char, mousePosition) then
                 self:lock()
                 b.state = "running"
-
-                task(
-                    function(_) -- это коллбэк, который сработает по окончании анимации спелла
-                        b:endCast()
-                    end
-                )
             end
         end)
     end

lib/level/turn_order.lua

@@ -34,15 +34,6 @@ function turnOrder:next()
     local next = self.pendingQueue:peek()
     if not next then return self:endRound() end
     self.current = self.pendingQueue:pop()
-
-    local char = Tree.level.characters[self.current]
-    char:try(Tree.behaviors.ai, function(ai)
-        Tree.level.selector:lock()
-        ai:makeTurn()(function()
-            Tree.level.selector:unlock()
-            self:next()
-        end)
-    end)
 end
 
 --- Меняем местами очередь сходивших и не сходивших (пустую)

lib/simple_ui/level/end_turn.lua

@@ -57,7 +57,7 @@ function endTurnButton:onClick()
         end,
         duration = 1500,
         easing = easing.easeInOutCubic,
-        onEnd = function() if not playing:has(Tree.behaviors.ai) then Tree.level.selector:select(cid) end end
+        onEnd = function() Tree.level.selector:select(cid) end
     }:run()
 end
 

lib/spellbook.lua

@@ -7,22 +7,23 @@
 --- --TODO: каждый каст должен возвращать объект, который позволит отследить момент завершения анимации спелла
 --- Да, это Future/Promise/await/async
 
-local task    = require 'lib.utils.task'
+local AnimationNode = require "lib.animation_node"
+local easing        = require "lib.utils.easing"
 
 --- @class Spell Здесь будет много бойлерплейта, поэтому тоже понадобится спеллмейкерский фреймворк, который просто вернет готовый Spell
 --- @field tag string
 --- @field update fun(self: Spell, caster: Character, dt: number): nil Изменяет состояние спелла
 --- @field draw fun(self: Spell): nil Рисует превью каста, ничего не должна изменять в идеальном мире
---- @field cast fun(self: Spell, caster: Character, target: Vec3): Task<nil> | nil Вызывается в момент каста, изменяет мир.
-local spell   = {}
-spell.__index = spell
-spell.tag     = "base"
+--- @field cast fun(self: Spell, caster: Character, target: Vec3): boolean Вызывается в момент каста, изменяет мир. Возвращает bool в зависимости от того, получилось ли скастовать
+local spell         = {}
+spell.__index       = spell
+spell.tag           = "base"
 
 function spell:update(caster, dt) end
 
 function spell:draw() end
 
-function spell:cast(caster, target) return end
+function spell:cast(caster, target) return true end
 
 local walk = setmetatable({
     --- @type Deque
@@ -34,28 +35,30 @@ function walk:cast(caster, target)
     if not caster:try(Tree.behaviors.stats, function(stats)
             return stats.mana >= 2
         end) then
-        return
+        return false
     end
 
-    local initialPos = caster:has(Tree.behaviors.positioned).position:floor()
-    local path = require "lib.pathfinder" (initialPos, target)
+    local path = require "lib.pathfinder" (caster:has(Tree.behaviors.positioned).position:floor(), target)
     path:pop_front()
-    if path:is_empty() then
-        print("[Walk]: the path is empty", initialPos, target)
-        return
-    end
+    if path:is_empty() then return false end
+
+    for p in path:values() do print(p) end
 
     caster:try(Tree.behaviors.stats, function(stats)
         stats.mana = stats.mana - 2
+        print(stats.mana)
     end)
 
     local sprite = caster:has(Tree.behaviors.sprite)
-    assert(sprite, "[Walk]", "WTF DUDE WHERE'S YOUR SPRITE")
-    if not sprite then
-        return
-    end
+    if not sprite then return true end
+    AnimationNode {
+        function(node)
+            caster:has(Tree.behaviors.tiled):followPath(path, node)
+        end,
+        onEnd = function() caster:has(Tree.behaviors.spellcaster):endCast() end,
+    }:run()
 
-    return caster:has(Tree.behaviors.tiled):followPath(path)
+    return true
 end
 
 function walk:update(caster, dt)
@@ -87,10 +90,9 @@ function regenerateMana:cast(caster, target)
         stats.mana = 10
         stats.initiative = stats.initiative + 10
     end)
-
-    local sprite = caster:has(Tree.behaviors.sprite)
-    if not sprite then return nil end
     print(caster.id, "has regenerated mana and gained initiative")
+    local sprite = caster:has(Tree.behaviors.sprite)
+    if not sprite then return true end
 
     local light = require "lib/character/character".spawn("Light Effect")
     light:addBehavior {
@@ -98,11 +100,26 @@ function regenerateMana:cast(caster, target)
         Tree.behaviors.residentsleeper.new(),
         Tree.behaviors.positioned.new(caster:has(Tree.behaviors.positioned).position + Vec3 { 0.5, 0.5 }),
     }
+    AnimationNode {
+        function(node)
+            local audioPath = Tree.assets.files.audio
+            sprite:animate("hurt", node)
+            Tree.audio:crossfade(audioPath.music.level1.battle,
+                audioPath.music.level1.choral, 5000)
+        end,
+        onEnd = function() caster:has(Tree.behaviors.spellcaster):endCast() end
+    }:run()
 
-    return task.wait {
-        light:has(Tree.behaviors.light):animateColor(Vec3 {}),
-        sprite:animate("hurt")
-    }
+    AnimationNode {
+        function(node)
+            light:has(Tree.behaviors.light):animateColor(Vec3 {}, node)
+        end,
+        easing = easing.easeInQuad,
+        duration = 800,
+        onEnd = function() light:die() end
+    }:run()
+
+    return true
 end
 
 local attack = setmetatable({}, spell)
@@ -114,7 +131,7 @@ function attack:cast(caster, target)
             print("dist:", dist)
             return dist > 2
         end) then
-        return
+        return false
     end
 
     caster:try(Tree.behaviors.stats, function(stats)
@@ -123,7 +140,7 @@ function attack:cast(caster, target)
 
     --- @type Character
     local targetCharacterId = Tree.level.characterGrid:get(target)
-    if not targetCharacterId or targetCharacterId == caster.id then return end
+    if not targetCharacterId or targetCharacterId == caster.id then return false end
     local targetCharacter = Tree.level.characters[targetCharacterId]
     targetCharacter:try(Tree.behaviors.stats, function(stats)
         stats.hp = stats.hp - 4
@@ -131,20 +148,43 @@ function attack:cast(caster, target)
 
     local sprite = caster:has(Tree.behaviors.sprite)
     local targetSprite = targetCharacter:has(Tree.behaviors.sprite)
-    if not sprite or not targetSprite then return end
+    if not sprite or not targetSprite then return true end
 
     caster:try(Tree.behaviors.positioned, function(b) b:lookAt(target) end)
 
-    return
-        task.wait {
-            sprite:animate("attack"),
-            task.wait {
-                task.chain(targetCharacter:has(Tree.behaviors.residentsleeper):sleep(200),
-                    function() return targetSprite:animate("hurt") end
-                ),
-                Tree.audio:play(Tree.assets.files.audio.sounds.hurt)
+    AnimationNode {
+        onEnd = function() caster:has(Tree.behaviors.spellcaster):endCast() end,
+        children = {
+            AnimationNode {
+                function(node)
+                    sprite:animate("attack", node)
+                end
+            },
+            AnimationNode {
+                function(node)
+                    targetCharacter:has(Tree.behaviors.residentsleeper):sleep(node)
+                end,
+                duration = 200,
+                children = {
+                    AnimationNode {
+                        function(node)
+                            local audioPath = Tree.assets.files.audio
+                            targetSprite:animate("hurt", node)
+                            --- @type SourceFilter
+                            local settings = {
+                                type = "highpass",
+                                volume = 1,
+                                lowgain = 0.1
+                            }
+                            Tree.audio:play(audioPath.sounds.hurt, settings)
+                        end
+                    }
+                }
             }
         }
+    }:run()
+
+    return true
 end
 
 ----------------------------------------
@@ -159,7 +199,6 @@ local spellbook = {
 function spellbook.of(list)
     local spb = {}
     for i, sp in ipairs(list) do
-        print(i)
         spb[i] = setmetatable({}, { __index = sp })
     end
     return spb

lib/utils/counter.lua

@@ -1,40 +0,0 @@
---- @class Counter
---- @field private count integer
---- @field private onFinish fun(): nil
---- @field private isAlive boolean
---- @field push fun():nil добавить 1 к счетчику
---- @field pop fun():nil убавить 1 у счетчика
---- @field set fun(count: integer): nil установить значение на счетчике
-local counter = {}
-counter.__index = counter
-
-
---- @private
-function counter:_push()
-    self.count = self.count + 1
-end
-
---- @private
-function counter:_pop()
-    self.count = self.count - 1
-    if self.count == 0 and self.isAlive then
-        self.isAlive = false
-        self.onFinish()
-    end
-end
-
---- @param onFinish fun(): nil
-local function new(onFinish)
-    local t = {
-        count = 0,
-        onFinish = onFinish,
-        isAlive = true,
-    }
-    t.push = function() counter._push(t) end
-    t.pop = function() counter._pop(t) end
-    t.set = function(count) t.count = count end
-
-    return setmetatable(t, counter)
-end
-
-return new

lib/utils/task.lua

@@ -1,83 +0,0 @@
---- Обобщенная асинхронная функция
----
---- Использование в общих чертах выглядит так:
---- ```lua
---- local multiplyByTwoCallback = nil
---- local n = nil
---- local function multiplyByTwoAsync(number)
----     -- императивно сохраняем/обрабатываем параметр
----     n = number
----     return function(callback) -- это функция, которая запускает задачу
----         multiplyByTwoCallback = callback
----     end
---- end
----
---- local function update(dt)
----     --- ждем нужного момента времени...
----
----     if multiplyByTwoCallback then -- завершаем вычисление
----         local result = n * 2
----         multiplyByTwoCallback(result) -- результат асинхронного вычисления идет в параметр коллбека!
----         multiplyByTwoCallback = nil
----     end
---- end
----
----
---- --- потом это можно вызывать так:
---- local task = multiplyByTwoAsync(21)
---- -- это ленивое вычисление, так что в этот момент ничего не произойдет
---- -- запускаем
---- task(
----     function(result) print(result) end -- выведет 42 после завершения вычисления, т.е. аналогично `task.then((res) => print(res))` на JS
---- )
----
---- ```
---- @generic T
---- @alias Task<T> fun(callback: fun(value: T): nil): nil
-
---- Возвращает новый Task, который завершится после завершения всех переданных `tasks`.
----
---- Значение созданного Task будет содержать список значений `tasks` в том же порядке.
----
---- См. также https://api.dart.dev/dart-async/Future/wait.html
---- @generic T
---- @param tasks Task[]
---- @return Task<T[]>
-local function wait(tasks)
-    local count = #tasks
-    local results = {}
-
-    return function(callback)
-        for i, task in ipairs(tasks) do
-            task(
-                function(result)
-                    results[i] = result
-
-                    count = count - 1
-                    if count == 0 then callback(results) end
-                end
-            )
-        end
-    end
-end
-
-
---- Последовательно объединяет два `Task` в один.
---- @generic T
---- @generic R
---- @param task Task<T> `Task`, который выполнится первым
---- @param onCompleted fun(value: T): Task<R> Конструктор второго `Task`. Принимает результат выполнения первого `Task`
---- @return Task<R>
-local function chain(task, onCompleted)
-    return function(callback)
-        task(function(value)
-            local task2 = onCompleted(value)
-            task2(callback)
-        end)
-    end
-end
-
-return {
-    wait = wait,
-    chain = chain
-}

main.lua

@@ -2,8 +2,6 @@
 
 local character = require "lib/character/character"
 local testLayout
-local TestRunner = require "test.runner"
-TestRunner:register(require "test.task")
 
 function love.conf(t)
     t.console = true
@@ -25,36 +23,15 @@ function love.load()
                 Tree.behaviors.shadowcaster.new(),
                 Tree.behaviors.spellcaster.new()
             },
-        character.spawn("Foodor")
-            :addBehavior {
-                Tree.behaviors.residentsleeper.new(),
-                Tree.behaviors.stats.new(nil, nil, 1),
-                Tree.behaviors.positioned.new(Vec3 { 4, 3 }),
-                Tree.behaviors.tiled.new(),
-                Tree.behaviors.sprite.new(Tree.assets.files.sprites.character),
-                Tree.behaviors.shadowcaster.new(),
-                Tree.behaviors.spellcaster.new()
-            },
-        character.spawn("Foodor")
-            :addBehavior {
-                Tree.behaviors.residentsleeper.new(),
-                Tree.behaviors.stats.new(nil, nil, 3),
-                Tree.behaviors.positioned.new(Vec3 { 5, 3 }),
-                Tree.behaviors.tiled.new(),
-                Tree.behaviors.sprite.new(Tree.assets.files.sprites.character),
-                Tree.behaviors.shadowcaster.new(),
-                Tree.behaviors.spellcaster.new()
-            },
         character.spawn("Baris")
             :addBehavior {
                 Tree.behaviors.residentsleeper.new(),
-                Tree.behaviors.stats.new(nil, nil, 2),
+                Tree.behaviors.stats.new(nil, nil, 1),
                 Tree.behaviors.positioned.new(Vec3 { 5, 5 }),
                 Tree.behaviors.tiled.new(),
                 Tree.behaviors.sprite.new(Tree.assets.files.sprites.character),
                 Tree.behaviors.shadowcaster.new(),
-                Tree.behaviors.spellcaster.new(),
-                Tree.behaviors.ai.new()
+                Tree.behaviors.spellcaster.new()
             },
     }
 
@@ -69,8 +46,6 @@ end
 
 local lt = "0"
 function love.update(dt)
-    TestRunner:update(dt) -- закомментировать для отключения тестов
-
     local t1 = love.timer.getTime()
     Tree.controls:poll()
     Tree.level.camera:update(dt) -- сначала логика камеры, потому что на нее завязан UI

test/runner.lua

@@ -1,46 +0,0 @@
---- @class Test
-local test = {}
-function test:run(complete) end
-
-function test:update(dt) end
-
---- @class TestRunner
---- @field private tests Test[]
---- @field private state "loading" | "running" | "completed"
---- @field private completedCount integer
-local runner = {}
-runner.tests = {}
-runner.state = "loading"
-runner.completedCount = 0
-
---- глобальный update для тестов, нужен для тестирования фич, зависимых от времени
-function runner:update(dt)
-    if self.state == "loading" then
-        print("[TestRunner]: running " .. #self.tests .. " tests")
-
-        for _, t in ipairs(self.tests) do
-            t:run(
-                function()
-                    self.completedCount = self.completedCount + 1
-                    if self.completedCount == #self.tests then
-                        self.state = "completed"
-                        print("[TestRunner]: tests completed")
-                    end
-                end
-            )
-        end
-        self.state = "running"
-    end
-
-    for _, t in ipairs(self.tests) do
-        if t.update then t:update(dt) end
-    end
-end
-
---- добавляет тест для прохождения
---- @param t Test
-function runner:register(t)
-    table.insert(self.tests, t)
-end
-
-return runner

test/task.lua

@@ -1,75 +0,0 @@
-local task = require "lib.utils.task"
-
-local test = {}
-
-local t0
-local task1Start, task2Start
-local task1Callback, task2Callback
-
---- @return Task<number>
-local function task1()
-    return function(callback)
-        task1Start = love.timer.getTime()
-        task1Callback = callback
-    end
-end
-
---- @return Task<number>
-local function task2()
-    return function(callback)
-        task2Start = love.timer.getTime()
-        task2Callback = callback
-    end
-end
-
-function test:run(complete)
-    t0 = love.timer.getTime()
-
-    task.wait {
-        task1(),
-        task2()
-    } (function(values)
-            local tWait = love.timer.getTime()
-            local dt = tWait - t0
-
-            local t1 = values[1]
-            local t2 = values[2]
-
-            assert(type(t1) == "number" and type(t2) == "number")
-            assert(t2 > t1)
-            assert(dt >= 2, "dt = " .. dt)
-
-            print("task.wait completed in " .. dt .. " sec", "t1 = " .. t1 - t0, "t2 = " .. t2 - t0)
-
-
-            t0 = love.timer.getTime()
-            task.chain(task1(), function(value)
-                t1 = value
-                assert(t1 - t0 >= 1)
-                return task2()
-            end)(
-                    function(value)
-                        t2 = value
-                        assert(t2 - t0 >= 2)
-                        print("task.chain completed in " .. t2 - t0 .. " sec")
-
-                        complete()
-                    end
-                )
-        end)
-end
-
-function test:update(dt)
-    local t = love.timer.getTime()
-    if task1Start and t - task1Start >= 1 then
-        task1Callback(t)
-        task1Start = nil
-    end
-
-    if task2Start and t - task2Start >= 2 then
-        task2Callback(t)
-        task2Start = nil
-    end
-end
-
-return test