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

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local luaunit = require("luaunit")

local maths = require("luaplot.maths")

local checks = require("luatypechecks.checks")

-- luacheck: globals TestMaths

TestMaths = {}

function TestMaths.test_clamp_middle()

local result = maths.clamp(32, 23, 42)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 32)

end

function TestMaths.test_clamp_minimum()

local result = maths.clamp(23, 23, 42)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 23)

end

function TestMaths.test_clamp_before_minimum()

local result = maths.clamp(22, 23, 42)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 23)

end

function TestMaths.test_clamp_maximum()

local result = maths.clamp(42, 23, 42)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 42)

end

function TestMaths.test_clamp_after_maximum()

local result = maths.clamp(43, 23, 42)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 42)

end

function TestMaths.test_lerp_middle()

local result = maths.lerp(23, 42, 0.2)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 26.8)

end

function TestMaths.test_lerp_minimum()

local result = maths.lerp(23, 42, 0)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 23)

end

function TestMaths.test_lerp_maximum()

local result = maths.lerp(23, 42, 1)

luaunit.assert_is_number(result)

luaunit.assert_equals(result, 42)

end

function TestMaths.test_random_in_range()

math.randomseed(1)

local results = {}

for _ = 1, 10 do

local result = maths.random_in_range(23, 42)

table.insert(results, result)

end

local wanted_results

if _VERSION == "Lua 5.5" or _VERSION == "Lua 5.4" then

wanted_results = {

38.496168,

41.744973,

24.507284,

32.474321,

34.244394,

38.845409,

25.936408,

28.019722,

27.905971,

37.831421,

}

elseif _VERSION == "Lua 5.3" or _VERSION == "Lua 5.2" then

wanted_results = {

30.493276,

37.878885,

38.170361,

40.321300,

26.753476,

29.369232,

37.596362,

28.277720,

33.525429,

32.070544,

}

elseif _VERSION == "Lua 5.1" then

if checks.is_table(jit) then -- check for LuaJIT

wanted_results = {

29.152401,

23.258655,

40.341720,

28.675371,

25.056512,

25.001620,

27.543950,

38.933066,

41.363617,

29.867614,

}

else

wanted_results = {

38.963567,

30.493276,

37.878885,

38.170361,

40.321300,

26.753476,

29.369232,

37.596362,

28.277720,

33.525429,

}

end

end

luaunit.assert_equals(#results, #wanted_results)

for index, result in ipairs(results) do

luaunit.assert_almost_equals(result, wanted_results[index], 1e-6)

end

end

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