Initial flame_lua_runtime package

test/runtime/lifecycle/runtime_async_gate_test.dart

@@ -0,0 +1,36 @@
+import 'package:flame_lua_runtime/runtime/lifecycle/runtime_async_gate.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('RuntimeAsyncGate', () {
+    test('accepts only current open generation tokens', () {
+      final gate = RuntimeAsyncGate();
+      final first = gate.activate();
+
+      expect(gate.accepts(first), isTrue);
+      expect(first.isAccepted, isTrue);
+
+      final second = gate.advance();
+
+      expect(gate.accepts(first), isFalse);
+      expect(gate.accepts(second), isTrue);
+    });
+
+    test('close rejects existing and future checks until activated again', () {
+      final gate = RuntimeAsyncGate();
+      final first = gate.activate();
+
+      gate.close();
+
+      expect(gate.isClosed, isTrue);
+      expect(gate.accepts(first), isFalse);
+      expect(gate.acceptsGeneration(gate.generation), isFalse);
+
+      final second = gate.activate();
+
+      expect(gate.isOpen, isTrue);
+      expect(gate.accepts(second), isTrue);
+      expect(gate.accepts(first), isFalse);
+    });
+  });
+}