-

Author: polina-c

analysis_options.yaml

@@ -5,6 +5,8 @@
 include: package:lints/recommended.yaml
 
 analyzer:
+  errors:
+    avoid_print: ignore
   language:
     strict-casts: true
     strict-inference: true

examples/eval/pubspec.yaml

@@ -12,6 +12,7 @@ environment:
 resolution: workspace
 
 dependencies:
+  dartantic_ai: ^3.1.0
   flutter:
     sdk: flutter
   genui: ^0.7.0

examples/eval/test/smoke_test.dart

@@ -2,15 +2,30 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// ignore_for_file: avoid_print
+
 import 'package:flutter_test/flutter_test.dart';
+import 'package:genui/genui.dart' as dartantic;
 
+import 'test_infra/ai_client.dart';
 import 'test_infra/api_key.dart';
 
 void main() {
   test('test can read api key "$geminiApiKeyName"', () {
     final String key = apiKeyForEval();
     expect(key, isNotEmpty);
-    // ignore: avoid_print
     print('API Key: ${key.substring(0, 1)}...${key.substring(key.length - 1)}');
   });
+
+  test('test can send message', () async {
+    final aiClient = DartanticAiClient();
+    addTearDown(aiClient.dispose);
+
+    final String result = await aiClient
+        .sendStream('Hello, how are you?', history: [])
+        .first;
+    expect(result, isNotEmpty);
+    print(result);
+    print(result);
+  });
 }

examples/eval/test/test_infra/ai_client.dart

@@ -0,0 +1,58 @@
+import 'dart:async';
+
+import 'package:dartantic_ai/dartantic_ai.dart' as dartantic;
+
+import 'api_key.dart';
+
+/// An abstract interface for AI clients.
+abstract interface class AiClient {
+  /// Sends a message stream request to the AI service.
+  ///
+  /// [prompt] is the user's message.
+  /// [history] is the conversation history.
+  Stream<String> sendStream(
+    String prompt, {
+    required List<dartantic.ChatMessage> history,
+  });
+
+  /// Dispose of resources.
+  void dispose();
+}
+
+/// An implementation of [AiClient] using `package:dartantic_ai`.
+class DartanticAiClient implements AiClient {
+  DartanticAiClient({String? modelName}) {
+    final String apiKey = apiKeyForEval();
+    _provider = dartantic.GoogleProvider(apiKey: apiKey);
+    _agent = dartantic.Agent.forProvider(
+      _provider,
+      chatModelName: modelName ?? 'gemini-3-flash-preview',
+    );
+  }
+
+  late final dartantic.GoogleProvider _provider;
+  late final dartantic.Agent _agent;
+
+  @override
+  Stream<String> sendStream(
+    String prompt, {
+    required List<dartantic.ChatMessage> history,
+  }) async* {
+    final Stream<dartantic.ChatResult<String>> stream = _agent.sendStream(
+      prompt,
+      history: history,
+    );
+
+    await for (final result in stream) {
+      if (result.output.isNotEmpty) {
+        yield result.output;
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    // Dartantic Agent/Provider doesn't strictly require disposal currently,
+    // but good to have the hook.
+  }
+}