Add support for CI screenshot testing

Rework the high-level App & AppView widgets a bit to allow
conditionally displaying a simple fixed pattern if the
HOMESCREEN_DEMO_CI environment variable is set to anything
other than "0".  The pattern displayed matches what the
Qt homescreen shows for this to allow the CI test to be
common.

Bug-AGL: SPEC-5203

Change-Id: I36ed77c91304e3b6cdbce6a7350831d52d20d378
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
(cherry picked from commit 25b6a079d5fe9c1365d776298ae5230a4de1ba16)

3 files changed, 38 insertions, 10 deletions

diff --git a/lib/data/data_providers/app.dart b/lib/data/data_providers/app.dart
index acfaa01..3368a83 100644
--- a/lib/data/data_providers/app.dart
+++ b/lib/data/data_providers/app.dart
@@ -1,25 +1,32 @@
 import '../../export.dart';
 
+final homeScreenProvider = Provider((ref) {
+  final Map<String, String> envVars = Platform.environment;
+  final ciFlagStr = envVars['HOMESCREEN_DEMO_CI'];
+  final bool ciFlag = ciFlagStr != null && ciFlagStr != "0";
+  return ciFlag ? const HomeScreenCI() : const HomeScreen();
+});
+
 class App extends StatelessWidget {
   const App({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const AppView();
-  }
-}
-
-class AppView extends StatelessWidget {
-  const AppView({super.key});
-
-  @override
-  Widget build(BuildContext context) {
     return ProviderScope(
       child: MaterialApp(
         debugShowCheckedModeBanner: false,
         theme: theme,
-        home: const HomeScreen(),
+        home: const AppView(),
       ),
     );
   }
 }
+
+class AppView extends ConsumerWidget {
+  const AppView({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    return ref.watch(homeScreenProvider);
+  }
+}
diff --git a/lib/export.dart b/lib/export.dart
index ef029c7..90ed196 100644
--- a/lib/export.dart
+++ b/lib/export.dart
@@ -16,6 +16,7 @@ export 'data/models/hybrid.dart';
 
 //Screens
 export 'presentation/screens/home/home.dart';
+export 'presentation/screens/home/home_ci.dart';
 export 'presentation/screens/home/widgets/custom_tile.dart';
 export 'presentation/screens/dashboard/dashboard.dart';
 export 'presentation/screens/dashboard/widgets/hybrid/hybrid.dart';
diff --git a/lib/presentation/screens/home/home_ci.dart b/lib/presentation/screens/home/home_ci.dart
new file mode 100644
index 0000000..8584420
--- /dev/null
+++ b/lib/presentation/screens/home/home_ci.dart
@@ -0,0 +1,20 @@
+import 'package:flutter_ics_homescreen/export.dart';
+
+// Simple fixed pattern homescreen for AGL CI screenshot testing
+
+class HomeScreenCI extends StatelessWidget {
+  const HomeScreenCI({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        // Note that the colors are specified with hex in order to match
+        // Qt's red/blue/green constants, which are different than Flutter's.
+        Container(width: 1080, height: 216, color: Color(0xFF0000FF)),
+        Container(width: 1080, height: 1488, color: Color(0xFFFF0000)),
+        Container(width: 1080, height: 216, color: Color(0xFF008000))
+      ],
+    );
+  }
+}