ENH: Make monkeypatch available

[michaelaye]

Not sure if this is possible, but for some tests I need to monkeypatch sys calls to force test unity on different systems, like so:

# setup
def mockreturn(host):
    return 'test-machine'
from iuvs import io
from pathlib import Path

def test_get_data_path(monkeypatch):
    monkeypatch.setattr(socket, 'gethostname', mockreturn)
    x = io.get_stage_path()
    assert x == Path('/abc')

The test works when run in the terminal, but I really would like to be able to have my tests working in the notebook. Is there a way to have this working? Like this it of course fails, because I don't have a monkeypatch object available during runtime of the notebook. I already asked Holger Krekel (pytest author) what he thinks.

[michaelaye]

Hm, interesting, seems for simple things like this, one does not need monkeypatch, can just assign myself a new function to a module attribute like so:

def mockreturn():
    return 'test-machine'
import socket
socket.gethostname = mockreturn

from iuvs import io
from pathlib import Path

# test_get_stage_path():
x = io.get_stage_path()
assert x == Path('/abc')

Works just as well, so maybe we won't need this. Closing.

[michaelaye]

To get this, you probably should see the function itself, ;)

def get_stage_path():
    host = socket.gethostname()
    if host.startswith('maven-iuvs-itf'):
        stage = Path('/maven_iuvs/stage/products')
    elif host.startswith('test-machine'):
        stage = Path('/abc')
    else:
        stage = Path(os.environ['HOME']) / 'data' / 'iuvs'
    return stage

[michaelaye]

And for this function, this does not make much sense, admittedly, but I want to test other functions that use this as a start to define the basic path.