如何用单元测试模拟flask.request？

from flask import Flask, request
import unittest

class MyTestCase(unittest.TestCase):
    def setUp(self):
        self.app = Flask(__name__)

    def test_request(self):
        with self.app.test_request_context('/?name=test'):
            # 模拟GET请求，获取请求参数
            self.assertEqual(request.args.get('name'), 'test')

            # 模拟POST请求，获取请求体数据
            with self.app.test_request_context('/', method='POST', data={'name': 'test'}):
                self.assertEqual(request.form['name'], 'test')

            # 模拟上传文件
            with self.app.test_request_context('/', method='POST', data={'file': (BytesIO(b'my file contents'), 'test.txt')}):
                file = request.files['file']
                self.assertEqual(file.filename, 'test.txt')
                self.assertEqual(file.read(), b'my file contents')

if __name__ == '__main__':
    unittest.main()