4. Replace tests/smoke.luau

descriptor contract + one state transition

The test verifies the initial descriptors, drives the real button action, and proves the changed direction with the same node ID.

Focused example

--!strict

local app = require("app/main")

local function find(node: any, id: string): any?
    if node.id == id then return node end
    for _, child in node.children or {} do
        local result = find(child, id)
        if result ~= nil then return result end
    end
    return nil
end

local initialCard = find(app.render(), "motion/card") :: any
local initialMotion = initialCard.properties.motion :: any
local initialOpacity = initialMotion.opacity :: any
local initialTranslation = initialMotion.translateX :: any
assert(initialCard.id == "motion/card")
assert(initialOpacity.kind == "tween")
assert(initialOpacity.from == 0 and initialOpacity.to == 1)
assert(initialTranslation.from == -28)
assert(initialTranslation.to == 0)

app.handle("motion.replay", "motion/replay", "")
local snapshot = app.snapshot()
assert(snapshot.run == 1 and snapshot.fromLeft == false)

local changedCard = find(app.render(), "motion/card") :: any
local changedMotion = changedCard.properties.motion :: any
local changedTranslation = changedMotion.translateX :: any
assert(changedCard.id == initialCard.id)
assert(changedTranslation.from == 28)
assert(changedTranslation.to == 0)

return true

Complete inventory