diff --git a/lib/utils/counter.lua b/lib/utils/counter.lua
index 9e8273f..5f75337 100644
--- a/lib/utils/counter.lua
+++ b/lib/utils/counter.lua
@@ -4,6 +4,7 @@
 --- @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
 
@@ -31,6 +32,7 @@ local function new(onFinish)
     }
     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
diff --git a/lib/utils/task.lua b/lib/utils/task.lua
index a64ba49..009f0e7 100644
--- a/lib/utils/task.lua
+++ b/lib/utils/task.lua
@@ -34,3 +34,33 @@
 --- ```
 --- @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
+
+return {
+    wait = wait,
+}
diff --git a/main.lua b/main.lua
index b2f120c..b5064d8 100644
--- a/main.lua
+++ b/main.lua
@@ -2,6 +2,8 @@
 
 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
@@ -67,6 +69,8 @@ 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
diff --git a/test/runner.lua b/test/runner.lua
new file mode 100644
index 0000000..e865e1e
--- /dev/null
+++ b/test/runner.lua
@@ -0,0 +1,46 @@
+--- @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
diff --git a/test/task.lua b/test/task.lua
new file mode 100644
index 0000000..93908bf
--- /dev/null
+++ b/test/task.lua
@@ -0,0 +1,61 @@
+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)
+
+            complete()
+        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