monkeypatch.chdir in PyTest - Test Execution Trace

Test Overview

This test uses monkeypatch.chdir to change the current working directory temporarily. It verifies that the directory changes inside the test and reverts after the test ends.

Test Code - pytest

PyTest

import os
import pytest

def test_change_directory(monkeypatch):
    original_dir = os.getcwd()
    new_dir = "/tmp"
    
    monkeypatch.chdir(new_dir)
    current_dir = os.getcwd()
    
    assert current_dir == new_dir
    
    # After test, directory should revert automatically

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Test environment ready, current directory is original_dir	-	PASS
2	monkeypatch.chdir("/tmp") is called to change directory	Current working directory is changed to /tmp temporarily	-	PASS
3	os.getcwd() is called to get current directory	Current directory is /tmp	assert current_dir == new_dir	PASS
4	Test ends, monkeypatch reverts directory to original_dir	Current directory restored to original_dir	-	PASS

Failure Scenario

Failing Condition: If monkeypatch.chdir does not change directory or directory is not /tmp

Execution Trace Quiz - 3 Questions

What does monkeypatch.chdir do in this test?

A Permanently changes the current working directory

B Temporarily changes the current working directory

C Deletes the current working directory

D Creates a new directory

Key Result

Using monkeypatch.chdir allows tests to safely change the working directory without affecting other tests or the environment, ensuring isolation and cleanup.