lune/tests/roblox/instance/custom/methods.luau

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local roblox = require("@lune/roblox")
local inst = roblox.Instance.new("Instance") :: any
local part = roblox.Instance.new("Part") :: any
-- Basic sanity checks for callbacks
local success = pcall(function()
inst:Wat()
end)
assert(not success, "Nonexistent methods should error")
roblox.implementMethod("Instance", "Wat", function() end)
local success2 = pcall(function()
inst:Wat()
end)
assert(success2, "Nonexistent methods should error, unless implemented")
-- Instance should be passed to callback
roblox.implementMethod("Instance", "PassingInstanceTest", function(instance)
assert(instance == inst, "Invalid instance was passed to callback")
end)
roblox.implementMethod("Part", "PassingPartTest", function(instance)
assert(instance == part, "Invalid instance was passed to callback")
end)
inst:PassingInstanceTest()
part:PassingPartTest()
-- Any number of args passed & returned should work
roblox.implementMethod("Instance", "Echo", function(_, ...)
return ...
end)
local one, two, three = inst:Echo("one", "two", "three")
assert(one == "one", "implementMethod callback should return proper values")
assert(two == "two", "implementMethod callback should return proper values")
assert(three == "three", "implementMethod callback should return proper values")
-- Methods implemented by Lune should take precedence
roblox.implementMethod("Instance", "FindFirstChild", function()
error("unreachable")
end)
inst:FindFirstChild("Test")
part:FindFirstChild("Test")