Arrange-Act-Assert pattern in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to arrange the test data correctly.

PyTest

def test_sum():
    numbers = [1]
    result = sum(numbers)
    assert result == 6

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

A(1, 2, 3)

B[1, 2, 3]

C{1, 2, 3}

D1, 2, 3

Attempts:

3 left

💡 Hint

Common Mistakes

Using a tuple or set instead of a list.

Not using any container for numbers.

The test data should be a list to use with sum(). So [1, 2, 3] is correct.

2fill in blank

medium

Complete the code to act by calling the function under test.

PyTest

def test_uppercase():
    text = "hello"
    result = text.[1]()
    assert result == "HELLO"

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

Aupper

Blower

Ccapitalize

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() which converts to lowercase.

Using capitalize() which only changes the first letter.

The upper() method converts text to uppercase, matching the assertion.

3fill in blank

hard

Fix the error in the assertion to correctly check the result.

PyTest

def test_length():
    word = "test"
    length = len(word)
    assert length [1] 5

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

A==

B>

C<

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == 5 which fails because length is 4.

Using > 5 which is false.

The length of "test" is 4, which is less than 5, so < is correct.

4fill in blank

hard

Fill both blanks to create a test that asserts a list contains a value.

PyTest

def test_contains():
    items = [1, 2, 3]
    value = 2
    assert value [1] items[2]

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

Ain

Bnot in

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == which compares value to the whole list.

Using not in which would fail the test.

The correct syntax to check if a value is in a list is value in items. The second blank is empty because no extra operator is needed.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that filters items by value.

PyTest

def test_filter_dict():
    data = {'a': 1, 'b': 3, 'c': 2}
    filtered = {k: v for k, v in data.items() if v [1] [2]
    assert filtered == [3]

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

A>

B1

C{'b': 3, 'c': 2}

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > which changes the filter.

Using wrong expected dictionary in the assertion.

The comprehension filters values greater than 1, so v > 1. The expected filtered dictionary is {'b': 3, 'c': 2}.