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test/terminal_order_recovery_test.dart

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+import 'package:dio/dio.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pj_supermarket_cloud/common/models/api/hard_api_models.dart';
+import 'package:pj_supermarket_cloud/common/utils/order/terminal_order_recovery.dart';
+
+void main() {
+  ServiceOrderByAndroidCode snapshot({
+    String status = '5',
+    String payType = '4',
+    String userId = '7',
+    int total = 350,
+    int extra = 0,
+    int paid = 350,
+  }) =>
+      ServiceOrderByAndroidCode(
+        orderId: '2109484384436817922',
+        orderStatus: status,
+        payType: payType,
+        userId: userId,
+        totalPrice: total,
+        extraPrice: extra,
+        payPrice: paid,
+      );
+
+  Future<String?> recover(
+    Future<ServiceOrderByAndroidCode?> Function() lookup, {
+    String payType = '4',
+    String? userId = '7',
+  }) =>
+      TerminalOrderRecovery.recover(
+        lookup: lookup,
+        payType: payType,
+        userId: userId,
+        totalPrice: 350,
+        extraPrice: 0,
+        interval: Duration.zero,
+        attempts: 3,
+      );
+
+  test('Long 订单号与数字金额按原有编码解析', () {
+    final parsed = ServiceOrderByAndroidCode.fromJson({
+      'orderId': '2109484384436817922',
+      'orderStatus': '5',
+      'payType': '4',
+      'userId': 7,
+      'totalPrice': '350',
+      'extraPrice': 0,
+      'payPrice': 350,
+    });
+    expect(parsed.orderId, '2109484384436817922');
+    expect(parsed.userId, '7');
+    expect(parsed.totalPrice, 350);
+  });
+
+  test('请求超时和网关响应丢失可对账，明确业务拒绝及取消不轮询', () {
+    for (final type in [
+      DioExceptionType.connectionTimeout,
+      DioExceptionType.sendTimeout,
+      DioExceptionType.receiveTimeout,
+      DioExceptionType.connectionError,
+    ]) {
+      expect(
+        TerminalOrderRecovery.shouldQuery(
+          DioException(requestOptions: RequestOptions(), type: type),
+        ),
+        isTrue,
+      );
+    }
+    for (final status in [200, 400, 404, 502]) {
+      final options = RequestOptions();
+      expect(
+        TerminalOrderRecovery.shouldQuery(
+          DioException(
+            requestOptions: options,
+            type: DioExceptionType.badResponse,
+            response: Response(requestOptions: options, statusCode: status),
+          ),
+        ),
+        status == 502,
+      );
+    }
+  });
+
+  test('等待原订单提交后找回成功结果，查询次数有界', () async {
+    var calls = 0;
+    final result = await recover(() async => ++calls < 3 ? null : snapshot());
+    expect(result, '2109484384436817922');
+    expect(calls, 3);
+  });
+
+  test('后端未部署对账接口时查询失败保持未确认，不产生支付重放', () async {
+    var calls = 0;
+    final result = await recover(() async {
+      calls++;
+      throw StateError('404');
+    });
+    expect(result, isNull);
+    expect(calls, 3);
+  });
+
+  test('退款、人员、支付方式或金额不一致均不能恢复成功', () async {
+    for (final invalid in [
+      snapshot(status: '10'),
+      snapshot(userId: '8'),
+      snapshot(payType: '3'),
+      snapshot(total: 351),
+      snapshot(extra: 1),
+    ]) {
+      expect(await recover(() async => invalid), isNull);
+    }
+  });
+
+  test('现金订单沿用实付零约定，使用商品额核对', () async {
+    expect(
+      await recover(
+        () async => snapshot(payType: '8', userId: '-1', paid: 0),
+        payType: '8',
+        userId: null,
+      ),
+      '2109484384436817922',
+    );
+  });
+}