Initial flame_lua_runtime package

test/runtime/lifecycle/runtime_session_test.dart

@@ -0,0 +1,38 @@
+import 'package:flame_lua_runtime/runtime/lifecycle/runtime_session.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('RuntimeSession', () {
+    test('moves through loading, active, disposing and disposed states', () {
+      final session = RuntimeSession(gameId: 'game');
+
+      expect(session.state, RuntimeSessionState.created);
+      expect(session.acceptsWork, isTrue);
+      expect(session.isActive, isFalse);
+
+      session.beginLoading();
+      expect(session.state, RuntimeSessionState.loading);
+      expect(session.acceptsWorkFor(session.id), isTrue);
+      expect(session.accepts(session.id), isFalse);
+
+      session.activate();
+      expect(session.state, RuntimeSessionState.active);
+      expect(session.accepts(session.id), isTrue);
+
+      session.beginDisposing();
+      expect(session.state, RuntimeSessionState.disposing);
+      expect(session.acceptsWork, isFalse);
+      expect(session.accepts(session.id), isFalse);
+
+      session.dispose();
+      expect(session.state, RuntimeSessionState.disposed);
+      expect(session.acceptsWork, isFalse);
+    });
+
+    test('rejects invalid transitions', () {
+      final session = RuntimeSession(gameId: 'game')..activate();
+
+      expect(session.beginLoading, throwsA(isA<StateError>()));
+    });
+  });
+}