Monkeypatching input causes attribute error during testing

Question

I'm trying to monkeypatch in pytest the input function to simulate user input but I'm getting an attribute error.

I receive the same error when I use the mock.patch.object as well. But I'm able to readily monkeypatch the input when I'm in a regular Python environment, I only get this error in testing.

What could be causing this issue?

Edit Adding additional screenshot trying same thing using unittest.mock

Please do not post screenshots but your actual code.

poke
– poke

2016-07-14 19:26:26 +00:00
Commented Jul 14, 2016 at 19:26 — poke
– poke, Commented Jul 14, 2016 at 19:26

user2357112 · Accepted Answer · 2016-07-14 18:40:02Z

3

__builtins__ is an implementation detail. You shouldn't touch it. What you're looking for is either the __builtin__ (no s) or builtins module, depending on whether you're on Python 2 or 3.

Judging by the details of the error you got, you're on Python 3, so you want builtins.

answered Jul 14, 2016 at 18:40

user2357112

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3 Comments

canyon289 Over a year ago

I'm on Python3 but I need to replace the input() function with one that returns a fake input. Trying to this without using a decorator or mock module stackoverflow.com/questions/18161330/…

idjaw Over a year ago

@canyon289 I'm confused. You provided a link that has two answers using a decorator and uses mock. And if you are looking for input to return a fake input, you are mocking input's functionality. So, I'm not sure what it is you are trying to do exactly.

canyon289 Over a year ago

One parts of my program takes a user input and returns a value. I'm trying to test using pytest and part of that test is having the input function return a value. To automate that test I'm trying to monkeypatch/mock the regular input function with one that will return a string set in the test. I get this same error whether I use the mock module or the pytest monkeypatch function

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