Conftest fixtures (shared across files) in PyTest - Test Execution Trace

Test Overview

This test uses a shared fixture defined in conftest.py to provide a sample user dictionary. It verifies that the test function receives the correct data from the fixture.

Test Code - PyTest

PyTest

import pytest

# conftest.py
@pytest.fixture

def sample_user():
    return {"name": "Alice", "age": 30}

# test_user.py

def test_user_name(sample_user):
    assert sample_user["name"] == "Alice"

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	PyTest discovers the fixture 'sample_user' in conftest.py	PyTest test runner ready to run tests in test_user.py	-	PASS
2	PyTest starts test 'test_user_name' and injects 'sample_user' fixture	Test function receives dictionary {"name": "Alice", "age": 30}	-	PASS
3	Test asserts that sample_user["name"] equals "Alice"	sample_user["name"] is "Alice"	assert sample_user["name"] == "Alice"	PASS
4	Test completes successfully	Test runner marks test as passed	-	PASS

Failure Scenario

Failing Condition: The fixture returns incorrect data or the test asserts wrong expected value

Execution Trace Quiz - 3 Questions

Where is the fixture 'sample_user' defined so it can be shared across multiple test files?

A In a separate test file

B Inside the test function

C In conftest.py

D In the main application code

Key Result

Using conftest.py to define fixtures allows sharing setup code across multiple test files, making tests cleaner and easier to maintain.