fix linux test

flutter · stuartmorgan-g · Feb 8, 2021 · Feb 6, 2021 · Feb 6, 2021 · Feb 6, 2021
commit 111922610c26b7686fa0df0eaaecfcf8374a5306
diff --git a/packages/shared_preferences/shared_preferences_linux/lib/shared_preferences_linux.dart b/packages/shared_preferences/shared_preferences_linux/lib/shared_preferences_linux.dart
@@ -45,7 +45,8 @@ class SharedPreferencesLinux extends SharedPreferencesStorePlatform {
     if (localDataFile.existsSync()) {
       String stringMap = localDataFile.readAsStringSync();
       if (stringMap.isNotEmpty) {
-        _cachedPreferences = json.decode(stringMap) as Map<String, Object>?;
+        _cachedPreferences =
+            (json.decode(stringMap) as Map).cast<String, Object>();
       }
     }