init

test/widget_test.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:freecell/main.dart';
+import 'package:freecell/screens/freecell_screen.dart';
+import 'package:freecell/screens/loading_screen.dart';
+import 'package:freecell/screens/start_screen.dart';
+
+void main() {
+  testWidgets('FreeCell app flow routes smoke test', (
+    WidgetTester tester,
+  ) async {
+    await tester.pumpWidget(const FreeCellDemoApp());
+    await tester.pump();
+
+    expect(find.byType(LoadingScreen), findsOneWidget);
+
+    final context = tester.element(find.byType(LoadingScreen));
+    Navigator.of(context).pushReplacementNamed('/start');
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 350));
+
+    expect(find.byType(StartScreen), findsOneWidget);
+
+    Navigator.of(
+      tester.element(find.byType(StartScreen)),
+    ).pushReplacementNamed('/game');
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 350));
+
+    expect(find.byType(FreeCellScreen), findsOneWidget);
+  });
+}