ML-81 Unsaved fractional stops (#83)

* save stop type to sharedPrefs

* tests

lib/data/shared_prefs_service.dart

@@ -14,6 +14,7 @@ class UserPreferencesService {
   static const ndFilterKey = "ndFilter";
 
   static const evSourceTypeKey = "evSourceType";
+  static const stopTypeKey = "stopType";
   static const cameraEvCalibrationKey = "cameraEvCalibration";
   static const lightSensorEvCalibrationKey = "lightSensorEvCalibration";
   static const meteringScreenLayoutKey = "meteringScreenLayout";
@@ -84,6 +85,9 @@ class UserPreferencesService {
   bool get caffeine => _sharedPreferences.getBool(caffeineKey) ?? false;
   set caffeine(bool value) => _sharedPreferences.setBool(caffeineKey, value);
 
+  StopType get stopType => StopType.values[_sharedPreferences.getInt(stopTypeKey) ?? 2];
+  set stopType(StopType value) => _sharedPreferences.setInt(stopTypeKey, value.index);
+
   MeteringScreenLayoutConfig get meteringScreenLayout {
     final configJson = _sharedPreferences.getString(meteringScreenLayoutKey);
     if (configJson != null) {

lib/providers/stop_type_provider.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
 import 'package:lightmeter/utils/inherited_generics.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
@@ -16,14 +17,12 @@ class StopTypeProvider extends StatefulWidget {
 }
 
 class StopTypeProviderState extends State<StopTypeProvider> {
-  StopType _stopType = StopType.third;
+  late StopType _stopType;
 
-  StopType get stopType => _stopType;
+  @override
-
+  void initState() {
-  void set(StopType type) {
+    super.initState();
-    setState(() {
+    _stopType = context.get<UserPreferencesService>().stopType;
-      _stopType = type;
-    });
   }
 
   @override
@@ -33,4 +32,11 @@ class StopTypeProviderState extends State<StopTypeProvider> {
       child: widget.child,
     );
   }
+
+  void set(StopType type) {
+    setState(() {
+      _stopType = type;
+    });
+    context.get<UserPreferencesService>().stopType = type;
+  }
 }

test/data/shared_prefs_service_test.dart

@@ -164,6 +164,25 @@ void main() {
     });
   });
 
+  group('stopType', () {
+    test('get default', () {
+      when(() => sharedPreferences.getInt(UserPreferencesService.stopTypeKey)).thenReturn(null);
+      expect(service.stopType, StopType.third);
+    });
+
+    test('get', () {
+      when(() => sharedPreferences.getInt(UserPreferencesService.stopTypeKey)).thenReturn(1);
+      expect(service.stopType, StopType.half);
+    });
+
+    test('set', () {
+      when(() => sharedPreferences.setInt(UserPreferencesService.stopTypeKey, 0))
+          .thenAnswer((_) => Future.value(true));
+      service.stopType = StopType.full;
+      verify(() => sharedPreferences.setInt(UserPreferencesService.stopTypeKey, 0)).called(1);
+    });
+  });
+
   group('meteringScreenLayout', () {
     test('get default', () {
       when(