feat: 调用 DeepSeek 时关闭思考模式

DeepSeek 默认开启思考，思考 token 按输出计费，且可能耗尽较小的 max_tokens 导致 JSON 截断。对 deepseek.com 地址：chat/completions 发送 thinking.type=disabled，Responses 发送 reasoning.effort=none；其他服务商请求体保持不变。 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-17 14:32:25 +09:00
parent f87849eb52
commit 9d30cd681e
2 changed files with 90 additions and 0 deletions
@@ -0,0 +1,64 @@
+import 'dart:convert';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart';
+import 'package:kouyu_english/core/ai_service.dart';
+import 'package:kouyu_english/core/models.dart';
+
+void main() {
+  const definition = '{"definition":"苹果"}';
+
+  Future<Map<String, dynamic>> captureBody(String endpoint) async {
+    AiService.instance.setFallbackApiKey('test-key');
+    Map<String, dynamic>? body;
+    final result = await http.runWithClient(
+      () => AiService.instance.temporaryDefinition(
+        provider: AiProviderType.compatible,
+        endpoint: endpoint,
+        model: 'deepseek-flash',
+        text: 'apple',
+      ),
+      () => MockClient((request) async {
+        body = jsonDecode(request.body) as Map<String, dynamic>;
+        return http.Response(
+          jsonEncode({
+            'choices': [
+              {
+                'message': {'content': definition},
+              },
+            ],
+            'output_text': definition,
+          }),
+          200,
+          headers: {'content-type': 'application/json; charset=utf-8'},
+        );
+      }),
+    );
+    expect(result, '苹果');
+    return body!;
+  }
+
+  test('DeepSeek chat completions request disables thinking', () async {
+    final body = await captureBody('https://api.deepseek.com');
+
+    expect(body['thinking'], {'type': 'disabled'});
+    expect(body.containsKey('reasoning_effort'), isFalse);
+    expect(body['max_tokens'], 200);
+  });
+
+  test('DeepSeek responses request sets reasoning effort to none', () async {
+    final body = await captureBody('https://api.deepseek.com/v1/responses');
+
+    expect(body['reasoning'], {'effort': 'none'});
+    expect(body.containsKey('reasoning_effort'), isFalse);
+    expect(body.containsKey('thinking'), isFalse);
+  });
+
+  test('other compatible endpoints keep their original payload', () async {
+    final body = await captureBody('https://example.test/v1');
+
+    expect(body.containsKey('thinking'), isFalse);
+    expect(body['reasoning_effort'], 'low');
+  });
+}