How to save json dumps of responses in python google api client?

Question

In the python google api documentation regarding mocks it is stated:

As you develop and test your application, it is a good idea to save actual API responses in files like books-discovery.json or books-android.json for use in testing.

Where do I get these json from? In particular the response to mock the build() command.

EDIT:

The class I want to test, calendar.py:

from google.oauth2 import service_account
from googleapiclient.discovery import build


class Calendar:
    def __init__(self, credentials_file, calendar_id) -> None:
        credentials = service_account.Credentials.from_service_account_file(
            credentials_file, scopes=["https://www.googleapis.com/auth/calendar"]
        )
        self.service = build("calendar", "v3", credentials=credentials)
        self._id = calendar_id

How to retrive the json response of build to save it in calendar-discovery.json?

Modified class to simplify mocking

import google_auth_httplib2
from google.oauth2 import service_account
from googleapiclient.discovery import build
from googleapiclient.http import build_http

class Calendar:
    def __init__(self, credentials_file, calendar_id) -> None:
        credentials = service_account.Credentials.from_service_account_file(
            credentials_file, scopes=["https://www.googleapis.com/auth/calendar"]
        )
        http = google_auth_httplib2.AuthorizedHttp(credentials, http=build_http())
        self.service = build("calendar", "v3", http=http)
        self._id = calendar_id

The test:

def test_calendar_initialization(mocker):
    mock = mocker.patch("meal_planner.calendar.build_http")
    mock.return_value = HttpMock("calendar-discovery.json", {"status": 200})

    calendar = Calendar(credentials_file="credential.json", calendar_id="id")

Answer 1

1. List all the discovery APIs: https://discovery.googleapis.com/discovery/v1/apis
2. Search for "name": "calendar"
3. Look for "discoveryRestUrl": "https://calendar-json.googleapis.com/$discovery/rest?version=v3"
4. Get the calendar discovery document

   curl https://calendar-json.googleapis.com/$discovery/rest?version=v3 > calendar-discovery.json`
   

Reference: https://developers.google.com/discovery