feat: use alien-signals

tests/signals/effectScope.spec.luau

@@ -0,0 +1,66 @@
+local test = require("../suite").test
+local signals = require("../../packages/charm/src/signals")
+
+local effect = signals.effect
+local effectScope = signals.effectScope
+local signal = signals.signal
+
+test("should not trigger after stop", function()
+	local count = signal(1)
+
+	local triggers = 0
+
+	local stopScope = effectScope(function()
+		effect(function()
+			triggers += 1
+			count()
+		end)
+		assert(triggers == 1, "did not run initially")
+
+		count(2)
+		assert(triggers == 2, "did not run after update")
+	end)
+
+	count(3)
+	assert(triggers == 3, "did not run after update outside scope")
+	stopScope()
+	count(4)
+	assert(triggers == 3, "ran after stop")
+end)
+
+test("should run effect cleanup", function()
+	local cleanups = 0
+
+	local cleanup = effectScope(function()
+		return function()
+			cleanups += 1
+		end
+	end)
+
+	assert(cleanups == 0, "should not cleanup immediately")
+	cleanup()
+	assert(cleanups == 1, "should cleanup after effect stop")
+	cleanup()
+	assert(cleanups == 1, "should skip redundant cleanup")
+end)
+
+test("should not run indirect effect cleanup", function()
+	local cleanups = 0
+
+	local cleanup
+	local stopScope = effectScope(function()
+		cleanup = effectScope(function()
+			return function()
+				cleanups += 1
+			end
+		end)
+	end)
+
+	assert(cleanups == 0, "should not cleanup immediately")
+	stopScope()
+	assert(cleanups == 0, "should be detached from parent dispose")
+	cleanup()
+	assert(cleanups == 1, "should cleanup after inner dispose")
+end)
+
+return {}