pytest.raises context manager - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a ZeroDivisionError is raised.

PyTest

import pytest

def test_divide_by_zero():
    with pytest.[1](ZeroDivisionError):
        x = 1 / 0

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

Aassert

Braises

Cexpect

Dcatch

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'assert' instead of 'raises' for exception checking.

Trying to catch exceptions manually instead of using pytest.raises.

The pytest.raises context manager is used to check if the specified exception is raised inside the block.

2fill in blank

medium

Complete the code to check if a ValueError is raised when converting a string to int.

PyTest

import pytest

def test_invalid_int():
    with pytest.[1](ValueError):
        int('abc')

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

Acatch

Bassert

Craises

Dexpect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'assert' instead of 'raises'.

Not using a context manager.

Use pytest.raises to verify that int('abc') raises a ValueError.

3fill in blank

hard

Fix the error in the code to properly check for a KeyError.

PyTest

import pytest

def test_key_error():
    with pytest.[1](KeyError):
        d = {'a': 1}
        value = d['b']

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

Araises

Bassert

Cexpect

Dcatch

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'assert' or 'expect' instead of 'raises'.

Not using a context manager.

The correct context manager to check for exceptions in pytest is raises. Using any other word causes an error.

4fill in blank

hard

Fill both blanks to check if a TypeError is raised and capture the exception as 'exc'.

PyTest

import pytest

def test_type_error():
    with pytest.[1](TypeError) as [2]:
        int(None)

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

Araises

Bexc

Cerror

Dcatch

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong context manager names.

Not capturing the exception object.

Use raises as the context manager and as exc to capture the exception object.

5fill in blank

hard

Fill all three blanks to check for an IndexError, capture it as 'e', and assert the error message contains 'list index out of range'.

PyTest

import pytest

def test_index_error():
    with pytest.[1](IndexError) as [2]:
        lst = []
        _ = lst[0]
    assert '[3]' in str(e.value)

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

Araises

Be

Clist index out of range

Derror

Attempts:

3 left

💡 Hint

Common Mistakes

Not capturing the exception object.

Checking the wrong error message.

Using wrong variable names.

Use raises to check the exception, capture it as e, and assert the expected message is in str(e.value).