feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

mobile/test/shared/community/community_icon_provider_test.dart

@@ -0,0 +1,93 @@
+import 'package:buzz/shared/community/community_icon_provider.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart' as http_testing;
+
+void main() {
+  test('fetches the NIP-11 icon over the relay HTTP URL', () async {
+    late http.Request capturedRequest;
+    final client = http_testing.MockClient((request) async {
+      capturedRequest = request;
+      return http.Response('{"icon":"data:image/png;base64,icon-bytes"}', 200);
+    });
+    final container = ProviderContainer(
+      overrides: [communityIconHttpClientProvider.overrideWithValue(client)],
+    );
+    addTearDown(container.dispose);
+
+    final icon = await container.read(
+      communityIconProvider('wss://relay.example.com').future,
+    );
+
+    expect(capturedRequest.url, Uri.parse('https://relay.example.com'));
+    expect(capturedRequest.headers['Accept'], 'application/nostr+json');
+    expect(icon, 'data:image/png;base64,icon-bytes');
+  });
+
+  test('returns null when the relay has no usable icon', () async {
+    final client = http_testing.MockClient(
+      (_) async => http.Response('{"icon":""}', 200),
+    );
+    final container = ProviderContainer(
+      overrides: [communityIconHttpClientProvider.overrideWithValue(client)],
+    );
+    addTearDown(container.dispose);
+
+    final icon = await container.read(
+      communityIconProvider('https://relay.example.com').future,
+    );
+
+    expect(icon, isNull);
+  });
+
+  test('returns null when relay information cannot be loaded', () async {
+    final client = http_testing.MockClient(
+      (_) async => http.Response('unavailable', 503),
+    );
+    final container = ProviderContainer(
+      overrides: [communityIconHttpClientProvider.overrideWithValue(client)],
+    );
+    addTearDown(container.dispose);
+
+    final icon = await container.read(
+      communityIconProvider('https://relay.example.com').future,
+    );
+
+    expect(icon, isNull);
+  });
+
+  test('refreshes a transient failure when explicitly invalidated', () async {
+    var requestCount = 0;
+    final client = http_testing.MockClient((_) async {
+      requestCount++;
+      if (requestCount == 1) {
+        return http.Response('unavailable', 503);
+      }
+      return http.Response(
+        '{"icon":"https://relay.example.com/icon.png"}',
+        200,
+      );
+    });
+    final container = ProviderContainer(
+      overrides: [communityIconHttpClientProvider.overrideWithValue(client)],
+    );
+    final provider = communityIconProvider('https://relay.example.com');
+    final subscription = container.listen(provider, (_, _) {});
+    addTearDown(() {
+      subscription.close();
+      container.dispose();
+    });
+
+    expect(await container.read(provider.future), isNull);
+    expect(requestCount, 1);
+
+    container.invalidate(provider);
+
+    expect(
+      await container.read(provider.future),
+      'https://relay.example.com/icon.png',
+    );
+    expect(requestCount, 2);
+  });
+}