mock camera focal length for integration tests

integration_test/e2e_test.dart

@@ -64,7 +64,7 @@ void testE2E(String description) {
       await tester.setApertureValues(mockEquipmentProfiles[0].apertureValues);
       await tester.setShutterSpeedValues(mockEquipmentProfiles[0].shutterSpeedValues);
       await tester.setZoomValue(mockEquipmentProfiles[0].lensZoom);
-      expect(find.text('x1.91'), findsOneWidget);
+      expect(find.text('50mm'), findsOneWidget);
       expect(find.text('f/1.7 - f/16'), findsOneWidget);
       expect(find.text('1/1000 - B'), findsOneWidget);
       await tester.saveEdits();
@@ -77,7 +77,7 @@ void testE2E(String description) {
       await tester.enterProfileName(mockEquipmentProfiles[1].name);
       await tester.setApertureValues(mockEquipmentProfiles[1].apertureValues);
       await tester.setZoomValue(mockEquipmentProfiles[1].lensZoom);
-      expect(find.text('x5.02'), findsOneWidget);
+      expect(find.text('135mm'), findsOneWidget);
       expect(find.text('f/3.5 - f/22'), findsOneWidget);
       expect(find.text('1/1000 - B'), findsNWidgets(1));
       await tester.saveEdits();

integration_test/run_all_tests.dart

@@ -1,12 +1,22 @@
+import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
 
 import 'e2e_test.dart';
 import 'metering_screen_layout_test.dart';
 import 'purchases_test.dart';
+import 'utils/platform_channel_mock.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
+  setUpAll(() {
+    mockCameraFocalLength();
+  });
+
+  tearDownAll(() {
+    mockCameraFocalLength();
+  });
+
   testPurchases('Purchase & refund premium features');
   testToggleLayoutFeatures('Toggle metering screen layout features');
   testE2E('e2e');

integration_test/utils/platform_channel_mock.dart

@@ -1,8 +1,10 @@
+import 'dart:io';
 import 'dart:math';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:light_sensor/light_sensor.dart';
+import 'package:lightmeter/data/camera_info_service.dart';
 
 void setLightSensorAvilability({required bool hasSensor}) {
   TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
@@ -57,3 +59,26 @@ void resetLightSensorStreamHandler() {
     null,
   );
 }
+
+void mockCameraFocalLength() {
+  TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+    CameraInfoService.cameraInfoPlatformChannel,
+    (methodCall) async {
+      switch (methodCall.method) {
+        case "mainCameraEfl":
+          return Platform.isAndroid
+              ? 24.0 // Pixel 6
+              : 26.0; // iPhone 13 Pro
+        default:
+          return null;
+      }
+    },
+  );
+}
+
+void resetCameraFocalLength() {
+  TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+    CameraInfoService.cameraInfoPlatformChannel,
+    null,
+  );
+}

screenshots/generate_screenshots.dart

@@ -6,7 +6,6 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
-import 'package:lightmeter/data/camera_info_service.dart';
 import 'package:lightmeter/data/models/camera_feature.dart';
 import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:lightmeter/data/models/exposure_pair.dart';
@@ -29,6 +28,7 @@ import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import '../integration_test/mocks/paid_features_mock.dart';
+import '../integration_test/utils/platform_channel_mock.dart';
 import '../integration_test/utils/widget_tester_actions.dart';
 import 'models/screenshot_args.dart';
 
@@ -96,19 +96,11 @@ void main() {
 
   setUpAll(() async {
     if (Platform.isAndroid) await binding.convertFlutterSurfaceToImage();
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-      CameraInfoService.cameraInfoPlatformChannel,
-      (methodCall) async {
-        switch (methodCall.method) {
-          case "mainCameraEfl":
-            return Platform.isAndroid
-                ? 24.0 // Pixel 6
-                : 26.0; // iPhone 13 Pro
-          default:
-            return null;
-        }
-      },
-    );
+    mockCameraFocalLength();
+  });
+
+  tearDownAll(() {
+    resetCameraFocalLength();
   });
 
   /// Generates several screenshots with the light theme