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The mocking library I use is ... mock.
I came across this "mock nested functions" problem when I tried to write test case for a function(legacy code).
This function used a very complex nested function with heavy dependencies on other modules.
I wonder if it's possible to mock nested functions with mock.
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You can use a MagicMock to replace pretty much any python object. Here, anything in the with block that would normally call super_nested instead will call the super_nested_mock and just return the value that you set to it.
To mock inner function with Jest and JavaScript, we should export the inner function in a module. import * as funcBModule from "./funcB"; import { funcA } from "./foo"; describe("helper", () => { test("test funcB", () => { expect(funcBModule. funcB()). toBe("original"); }); test("test funcA", () => { const spy = jest.
How do we mock in Python? Mocking in Python is done by using patch to hijack an API function or object creation call. When patch intercepts a call, it returns a MagicMock object by default. By setting properties on the MagicMock object, you can mock the API call to return any value you want or raise an Exception .
You can create a namespace that you export as the default object and call b using the namespace. This way, when you call jest. mock it will replace the b function on the namespace object. const f = require('./f'); jest.
for example you need to mock nested function calls (chained functions) from Google DRIVE API
result = get_drive_service().files().insert(body='body', convert=True).execute() so you need to patch through functions: service_mock(), files(), insert(), till last execute() response:
from mock import patch with patch('path.to.import.get_drive_service') as service_mock: service_mock.return_value.files.return_value.insert.\ return_value.execute.return_value = {'key': 'value', 'status': 200} Main scheme: first.return_value.second.return_value.third.return_value.last.return_value = rsp
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