Pesto demo for the Flutter Gallery app. (#4328)

* Pesto demo for the Flutter Gallery app.

* pesto.special.case

examples/flutter_gallery/flutter.yaml

@@ -8,6 +8,30 @@ assets:
   - assets/section_components.png
   - assets/section_patterns.png
   - assets/section_usability.png
+  - packages/flutter_gallery_assets/pesto/avatar.jpg
+  - packages/flutter_gallery_assets/pesto/image10.jpg
+  - packages/flutter_gallery_assets/pesto/image11.jpg
+  - packages/flutter_gallery_assets/pesto/image12.jpg
+  - packages/flutter_gallery_assets/pesto/image13.jpg
+  - packages/flutter_gallery_assets/pesto/image1.jpg
+  - packages/flutter_gallery_assets/pesto/image2.jpg
+  - packages/flutter_gallery_assets/pesto/image3.jpg
+  - packages/flutter_gallery_assets/pesto/image4.jpg
+  - packages/flutter_gallery_assets/pesto/image5.jpg
+  - packages/flutter_gallery_assets/pesto/image6.jpg
+  - packages/flutter_gallery_assets/pesto/image7.jpg
+  - packages/flutter_gallery_assets/pesto/image8.jpg
+  - packages/flutter_gallery_assets/pesto/image9.jpg
+  - packages/flutter_gallery_assets/pesto/logo_small.png
+  - packages/flutter_gallery_assets/pesto/logo_medium.png
+  - packages/flutter_gallery_assets/pesto/logo_big.png
+  - packages/flutter_gallery_assets/pesto/fish.png
+  - packages/flutter_gallery_assets/pesto/healthy.png
+  - packages/flutter_gallery_assets/pesto/main.png
+  - packages/flutter_gallery_assets/pesto/meat.png
+  - packages/flutter_gallery_assets/pesto/quick.png
+  - packages/flutter_gallery_assets/pesto/spicy.png
+  - packages/flutter_gallery_assets/pesto/veggie.png
   - packages/flutter_gallery_assets/ali_connors.png
   - packages/flutter_gallery_assets/kangaroo_valley_safari.png
   - packages/flutter_gallery_assets/top_10_australian_beaches.png
@@ -32,6 +56,11 @@ assets:
   - packages/flutter_gallery_assets/shrine/vendors/sandra-adams.jpg
   - packages/flutter_gallery_assets/shrine/vendors/zach.jpg
 fonts:
+  - family: Raleway
+    fonts:
+      - asset: packages/flutter_gallery_assets/pesto/fonts/Raleway-Regular.ttf
+      - asset: packages/flutter_gallery_assets/pesto/fonts/Raleway-Medium.ttf
+      - asset: packages/flutter_gallery_assets/pesto/fonts/Raleway-SemiBold.ttf
   - family: AbrilFatface
     fonts:
       - asset: packages/flutter_gallery_assets/shrine/fonts/abrilfatface/AbrilFatface-Regular.ttf

examples/flutter_gallery/lib/demo/all.dart

@@ -20,6 +20,7 @@ export 'menu_demo.dart';
 export 'modal_bottom_sheet_demo.dart';
 export 'overscroll_demo.dart';
 export 'page_selector_demo.dart';
+export 'pesto_demo.dart';
 export 'persistent_bottom_sheet_demo.dart';
 export 'progress_indicator_demo.dart';
 export 'scrollable_tabs_demo.dart';

examples/flutter_gallery/lib/gallery/app.dart

@@ -10,6 +10,7 @@ import 'home.dart';
 
 // Warning: this list must be in the same order that the demos appear in GalleryHome.
 final Map<String, WidgetBuilder> kRoutes = <String, WidgetBuilder>{
+  PestoDemo.routeName: (BuildContext context) => new PestoDemo(),
   ShrineDemo.routeName: (BuildContext context) => new ShrineDemo(),
   Calculator.routeName: (BuildContext context) => new Calculator(),
   ContactsDemo.routeName: (BuildContext context) => new ContactsDemo(),

examples/flutter_gallery/lib/gallery/home.dart

@@ -71,6 +71,7 @@ class GalleryHomeState extends State<GalleryHome> {
             leading: new Icon(icon: Icons.star),
             title: new Text('Demos'),
             children: <Widget>[
+              new GalleryItem(title: 'Pesto', routeName: PestoDemo.routeName),
               new GalleryItem(title: 'Shrine', routeName: ShrineDemo.routeName),
               new GalleryItem(title: 'Calculator', routeName: Calculator.routeName),
               new GalleryItem(title: 'Contacts', routeName: ContactsDemo.routeName)

examples/flutter_gallery/test/smoke_test.dart

@@ -47,10 +47,18 @@ Future<Null> smokeDemo(WidgetTester tester, String routeName) async {
       .pump(const Duration(seconds: 1)); // Wait until the demo has opened.
 
   // Go back
-  Finder backButton = findBackButton(tester);
-  expect(backButton, findsOneWidget);
-  await tester.tap(backButton);
-  await tester.pump(); // Start the navigator pop "back" operation.
+  if (routeName == '/pesto') {
+    // TODO(mpcomplete): workaround for Pesto, which has a drawer instead of a
+    // back button. Figure out how to have both.
+    Finder drawer = find.byType(Scaffold); // get a Widget for the BuildContext
+    expect(drawer, findsOneWidget);
+    Navigator.pop(drawer.evaluate().first);
+  } else {
+    Finder backButton = findBackButton(tester);
+    expect(backButton, findsOneWidget);
+    await tester.tap(backButton);
+    await tester.pump(); // Start the pop "back" operation.
+  }
   await tester.pump(const Duration(seconds: 1)); // Wait until it has finished.
   return null;
 }