mcp/tests/test_trial_goods_tax_tool.py

import unittest
from unittest.mock import Mock

from app import GatewayApp
from public_gateway import PublicGatewayApp
from services.output_presenter import OutputPresenter
from tools.trial_goods_tax import TrialGoodsTaxTool


class TrialGoodsTaxToolTest(unittest.TestCase):
    def test_call_forwards_required_fields(self):
        client = Mock()
        client.call_tool.return_value = {'code': 'MCP_0000'}
        TrialGoodsTaxTool(client).call(
            sku=' SKU-1 ',
            departure_country=' CN ',
            destination_country='us',
            price=10,
            qty=2,
            gross_weight=1.5,
            box=1,
        )
        client.call_tool.assert_called_once_with(
            'trial_goods_tax',
            '/mcp/tools/trialGoodsTax',
            {
                'sku': 'SKU-1',
                'departure_country': 'CN',
                'destination_country': 'US',
                'price': 10,
                'qty': 2,
                'gross_weight': 1.5,
                'box': 1,
            },
            'rq_trial_goods_tax',
        )

    def test_call_rejects_country_name(self):
        tool = TrialGoodsTaxTool(api_client=Mock())
        with self.assertRaises(ValueError):
            tool.call(
                sku='SKU-1', departure_country='中国', destination_country='US',
                price=10, qty=1, gross_weight=1, box=1,
            )

    def test_call_rejects_zero_price(self):
        tool = TrialGoodsTaxTool(api_client=Mock())
        with self.assertRaises(ValueError):
            tool.call(
                sku='SKU-1', departure_country='CN', destination_country='US',
                price=0, qty=1, gross_weight=1, box=1,
            )

    def test_registries_match(self):
        local = GatewayApp().registered_tool_names()
        public = PublicGatewayApp(None, None).registered_tool_names()
        self.assertEqual(local, public)
        self.assertIn('trial_goods_tax', local)
        self.assertEqual(39, len(local))
        self.assertIn('trial_goods_tax', OutputPresenter.SAFE_TOOLS)

    def test_presenter_renders_amount(self):
        result = OutputPresenter().present('trial_goods_tax', {
            'code': 'MCP_0000',
            'data': {
                'estimated_tax': 12.5,
                'sku': 'SKU-1',
                'departure_country': 'CN',
                'destination_country': 'US',
            },
            'meta': {'request_id': 'rq1'},
        })
        self.assertFalse(result['is_error'])
        self.assertEqual(12.5, result['structured_content']['estimated_tax'])
        self.assertIn('预计关税金额', result['text'])

    def test_presenter_keeps_safe_failure_message(self):
        result = OutputPresenter().present('trial_goods_tax', {
            'code': 'MCP_1501',
            'msg': '未找到已审核商品',
            'data': [],
            'meta': {'request_id': 'rq1'},
        })
        self.assertTrue(result['is_error'])
        self.assertEqual('未找到已审核商品', result['structured_content']['message'])