async.lua/test.lua at master · BlakeLiAFK/async.lua · GitHub

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local async = require('async')

---- waterfall 测试 ----
print('=== Waterfall Test ===')
async.waterfall({
    function (callback)
        print('step 1: initial values')
        callback(nil, 1, 2)
    end,
    function (callback, a, b)
        print('step 2: a=' .. a .. ', b=' .. b)
        callback(nil, a + b)
    end,
    function(callback, sum)
        print('step 3: sum=' .. sum)
        callback(nil, sum * 2)
    end
},
function (err, result)
    if err then
        print('waterfall error:', err)
    else
        print('waterfall result:', result)
    end
end)

---- parallel 测试 ----
print('\n=== Parallel Test (default max) ===')
async.parallel({
    function (callback)
        print('parallel task 1 started')
        callback(nil, 'result1')
    end,
    function (callback)
        print('parallel task 2 started')
        callback(nil, 'result2')
    end,
    function (callback)
        print('parallel task 3 started')
        callback(nil, 'result3')
    end
},
function (err, results)
    if err then
        print('parallel error:', err)
    else
        print('parallel completed')
        for i, result in ipairs(results) do
            print('  task ' .. i .. ':', result[1])
        end
    end
end)

---- parallel 测试（指定最大并行数）----
print('\n=== Parallel Test (max=2) ===')
async.parallel(2, {
    function (callback)
        print('limited parallel task 1 started')
        callback(nil, 'A')
    end,
    function (callback)
        print('limited parallel task 2 started')
        callback(nil, 'B')
    end,
    function (callback)
        print('limited parallel task 3 started')
        callback(nil, 'C')
    end,
    function (callback)
        print('limited parallel task 4 started')
        callback(nil, 'D')
    end,
    function (callback)
        print('limited parallel task 5 started')
        callback(nil, 'E')
    end
},
function (err, results)
    if err then
        print('limited parallel error:', err)
    else
        print('limited parallel completed')
        for i, result in ipairs(results) do
            print('  task ' .. i .. ':', result[1])
        end
    end
end)