python - 如何测试使用 Context 的 Azure Function？

Question

我正在编写一个使用上下文(用于监视目的)的 Azure 函数，这就是我的函数的样子:

import logging
import json
import azure.functions as func

def main(req: func.HttpRequest, context: func.Context) -> func.HttpResponse:
    logging.info(
        "{}\t{}".format(
            context.invocation_id, context.function_name
        )
    )
    reponse = "foo"    
    return func.HttpResponse(json.dumps(reponse), mimetype="application/json")

我想为此函数编写集成测试，如下所示:

import unittest
import azure.functions as func
from MyFunc import main    

class TestMyFunc(unittest.TestCase):
    def test_myfunc(self):
        req = func.HttpRequest(
            method="GET",
            body=None,
            url="/api/myfunc",
        )
        ctx = ??
        reponse = main(req, ctx) # This part fails because of the context

        self.assertEqual(
            reponse.get_body(),
            b'foo',
        )

如何创建 Context对象传递给我的 Azure 函数？

Answer 1

看起来像Context is an ABC(Abstract Base Class) class ，所以不能直接实例化。相反，您可以 subclass the func.Context class并将该类的实例用作 ctx

class MockContext(func.Context):
    def __init__(self, ii, fn, fd):
        self._invocation_id = ii
        self._function_name = fn
        self._function_directory = fd

    @property
    def invocation_id(self):
        return self._invocation_id

    @property
    def function_name(self):
        return self._function_name

    @property
    def function_directory(self):
        return self._function_directory

ctx = MockContext("Some dummy values")