Avoiding test interdependence in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mark the test as independent using pytest.

PyTest

import pytest

@pytest.mark.[1]
def test_example():
    assert 1 + 1 == 2

Drag options to blanks, or click blank then click option'

Aisolated

Bindependent

Cindep

Dindep_test

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent marker name.

Using abbreviations instead of full marker names.

The correct pytest marker to indicate test independence is independent.

2fill in blank

medium

Complete the code to reset the shared resource before each test using a fixture.

PyTest

import pytest

@pytest.fixture(autouse=True)
def reset_resource():
    global resource
    resource = [1]

resource = 0

def test_increment():
    global resource
    resource += 1
    assert resource == 1

Drag options to blanks, or click blank then click option'

A''

BNone

CFalse

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Resetting to None causes type errors.

Using empty string instead of zero.

Resetting the shared resource to 0 ensures tests start fresh.

3fill in blank

hard

Fix the error in the test to avoid dependence on previous test results.

PyTest

def test_append_item():
    items = []
    items.append('apple')
    assert len(items) == [1]

Drag options to blanks, or click blank then click option'

A1

B0

C2

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming the list has previous items from other tests.

Using zero or None as length after append.

After appending one item, the list length should be 1.

4fill in blank

hard

Fill both blanks to create a fixture that provides a fresh list for each test.

PyTest

import pytest

@pytest.fixture

def [1]():
    return [2]

Drag options to blanks, or click blank then click option'

Afresh_list

B[]

C{}

Dlist()

Attempts:

3 left

💡 Hint

Common Mistakes

Returning a dictionary instead of a list.

Using a shared list literal that causes test interference.

The fixture named fresh_list returns a new empty list using list() each time.

5fill in blank

hard

Fill all three blanks to write two independent tests using the fresh_list fixture.

PyTest

def test_add_item_[1](fresh_list):
    fresh_list.append('item')
    assert len(fresh_list) == [2]

def test_clear_list_[3](fresh_list):
    fresh_list.clear()
    assert len(fresh_list) == 0

Drag options to blanks, or click blank then click option'

Aone

B1

Ctwo

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same test name for both tests.

Expecting wrong list length after append.

The first test is named test_add_item_one and expects length 1. The second test is named test_clear_list_two.