refactor: improve structure and alien-signals integration

packages/react-charm/src/__tests__/useAtomBinding.spec.luau

@@ -0,0 +1,47 @@
+local Charm = require("../../Charm")
+local ReactCharm = require("../")
+local renderHook = require("./helpers/renderHook")
+local suite = require("../../../../test/suite")
+
+local atom = Charm.atom
+local useAtomBinding = ReactCharm.useAtomBinding
+local test = suite.test
+
+test("tracks atom state", function()
+	local state = atom(0)
+	local hook = renderHook(function()
+		return useAtomBinding(state)
+	end)
+	assert(hook.result:getValue() == 0, "should return 0")
+	state(1)
+	assert(hook.result:getValue() == 1, "should return 1")
+end)
+
+test("accepts a selector", function()
+	local state = atom(0)
+	local hook = renderHook(function()
+		return useAtomBinding(function()
+			return 2 * state()
+		end)
+	end)
+	assert(hook.result:getValue() == 0, "should return 0")
+	state(1)
+	assert(hook.result:getValue() == 2, "should return 2")
+end)
+
+test("tracks dependencies", function()
+	local state = atom(0)
+	local hook = renderHook(function()
+		return useAtomBinding(state, { state })
+	end)
+	assert(hook.result:getValue() == 0, "should return 0")
+	state(1)
+	assert(hook.result:getValue() == 1, "should return 1")
+	state = atom(0)
+	hook.rerender()
+	assert(hook.result:getValue() == 0, "should return 0")
+	state(1)
+	assert(hook.result:getValue() == 1, "should return 1")
+end)
+
+return {}