local ReplicatedStorage = game:GetService("ReplicatedStorage")

local Charm = require(ReplicatedStorage.DevPackages.Charm)
local atom = Charm.atom
local ReactCharm = require(ReplicatedStorage.DevPackages.ReactCharm)
local useAtom = ReactCharm.useAtom
local renderHook = require(script.Parent.Parent.utils.renderHook)

return function()
	it("tracks atom state", function()
		local source = atom(0)
		local hook = renderHook(function()
			return useAtom(source)
		end)
		expect(hook.result).to.equal(0)
		source(1)
		expect(hook.result).to.equal(1)
	end)

	it("accepts a molecule", function()
		local source = atom(0)
		local hook = renderHook(function()
			return useAtom(function()
				return 2 * source()
			end)
		end)
		expect(hook.result).to.equal(0)
		source(1)
		expect(hook.result).to.equal(2)
	end)

	it("tracks dependencies", function()
		local source = atom(0)
		local hook = renderHook(function()
			return useAtom(source, { source })
		end)
		expect(hook.result).to.equal(0)
		source(1)
		expect(hook.result).to.equal(1)
		source = atom(0)
		hook.rerender()
		expect(hook.result).to.equal(0)
		source(1)
		expect(hook.result).to.equal(1)
	end)
end