pytest-dev/pytest-mock

How to patch return_value attribute?

xmalter opened this issue · 2 comments

xmalter commented

Hello, sorry for opening issue, didn't find a better place to ask.

I'm wondering how I can replace this code:

with patch("service.services.MyService") as mock:
    mock.return_value.attribute = {'key': 'value'}

using mocker, I've tried this code, but it didn't work:

mocker.patch(
    "service.services.MyService.attribute",
    return_value={'key': 'value'},
    create=True # otherwise it fails with AttributeError
)
nicoddemus commented

Hi @xmalter,

It is similar, mocker.patch also return a MagicMock:

mock = mocker.patch("service.services.MyService.attribute")
mock.return_value.attribute = {'key': 'value'}
  • 👍1
xmalter commented

Thanks!

Actually it's

mock = mocker.patch("service.services.MyService") # <- No attribute here
mock.return_value.attribute = {'key': 'value'}

Otherwise it fails with AttributeError

  • 👍1