use fake platform interface for test

Author: lohanidamodar

templates/flutter/lib/src/client_io.dart.twig

@@ -80,7 +80,7 @@ class ClientIO extends ClientBase with ClientMixin {
   @override
   String get endPoint => _endPoint;
 
-  Future<Directory> getCookiePath() async {
+  Future<Directory> _getCookiePath() async {
     final directory = await getApplicationDocumentsDirectory();
     final path = directory.path;
     final Directory dir = Directory('$path/cookies');
@@ -133,7 +133,7 @@ class ClientIO extends ClientBase with ClientMixin {
   Future init() async {
     if(_initProgress) return;
     _initProgress = true;
-    final Directory cookieDir = await getCookiePath();
+    final Directory cookieDir = await _getCookiePath();
     _cookieJar = PersistCookieJar(storage: FileStorage(cookieDir.path));
     _interceptors.add(CookieManager(_cookieJar));
 

templates/flutter/pubspec.yaml.twig

@@ -21,6 +21,7 @@ dependencies:
   universal_html: ^2.0.8
 
 dev_dependencies:
+  path_provider_platform_interface: ^2.0.5
   flutter_lints: ^2.0.1
   flutter_test:
     sdk: flutter

tests/languages/flutter/tests.dart

@@ -1,21 +1,60 @@
 import 'package:flutter/material.dart';
+import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
+
 import '../lib/packageName.dart';
 import '../lib/client_io.dart';
 import '../lib/models.dart';
 import 'dart:io';
 
-class MockClient extends ClientIO {
-  Future<Directory> getCookiePath() async {
-    final dir = Directory('cookies');
-    await dir.create();
-    return dir;
+class FakePathProvider extends PathProviderPlatform {
+  @override
+  Future<String?> getTemporaryPath() async {
+    return '.';
+  }
+
+  @override
+  Future<String?> getApplicationSupportPath() async {
+    return '.';
+  }
+
+  @override
+  Future<String?> getLibraryPath() async {
+    return '.';
+  }
+
+  @override
+  Future<String?> getApplicationDocumentsPath() async {
+    return '.';
+  }
+
+  @override
+  Future<String?> getExternalStoragePath() async {
+    return '.';
+  }
+
+  @override
+  Future<List<String>?> getExternalCachePaths() async {
+    return <String>['.'];
+  }
+
+  @override
+  Future<List<String>?> getExternalStoragePaths({
+    StorageDirectory? type,
+  }) async {
+    return <String>['.'];
+  }
+
+  @override
+  Future<String?> getDownloadsPath() async {
+    return '.';
   }
 }
 
+
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  
-  Client client = MockClient();
+  PathProviderPlatform.instance = FakePathProvider();
+  Client client = Client();
   Foo foo = Foo(client);
   Bar bar = Bar(client);
   General general = General(client);