luaplot/iterable_test.lua at master · thewizardplusplus/luaplot · GitHub

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local luaunit = require("luaunit")

local middleclass = require("middleclass")

local assertions = require("luatypechecks.assertions")

local Iterable = require("luaplot.iterable")

-- luacheck: globals TestIterable

TestIterable = {}

function TestIterable.test_ipairs_metamethod()

local MockClass = middleclass("MockClass")

MockClass:include(Iterable)

MockClass.__index = function(_, index)

assertions.is_number(index)

return index <= 5 and index / 10 or nil

end

local mock = MockClass:new()

local values = {}

for index, value in mock:__ipairs() do

table.insert(values, {index = index, value = value})

end

luaunit.assert_equals(values, {

{index = 1, value = 0.1},

{index = 2, value = 0.2},

{index = 3, value = 0.3},

{index = 4, value = 0.4},

{index = 5, value = 0.5},

})

end

function TestIterable.test_ipairs_metamethod_empty()

local MockClass = middleclass("MockClass")

MockClass:include(Iterable)

MockClass.__index = function()

return nil

end

local mock = MockClass:new()

local values = {}

for index, value in mock:__ipairs() do

table.insert(values, {index = index, value = value})

end

luaunit.assert_equals(values, {})

end

luaplot/iterable_test.lua at master · thewizardplusplus/luaplot · GitHub

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