Why patterns improve test quality in PyTest - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to write a simple pytest test function that checks if 2 + 2 equals 4.

PyTest

def test_addition():
    assert 2 + 2 == [1]

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

A4

B5

C3

D6

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong expected value like 5 or 3.

Forgetting to use assert keyword.

The correct answer is 4 because 2 + 2 equals 4. This assertion checks the expected result.

2fill in blank

medium

Complete the code to use a pytest fixture named 'sample_data' in the test function.

PyTest

@pytest.fixture
def sample_data():
    return [1, 2, 3]

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

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

Adata

Bsample_data

Cinput_data

Dnumbers

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the fixture.

Not including the fixture as a parameter.

The test function must accept the fixture name 'sample_data' as a parameter to use it.

3fill in blank

hard

Fix the error in the test function by completing the assertion to check if the list is empty.

PyTest

def test_empty_list():
    my_list = []
    assert [1](my_list)

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

Anot

Blen

Cempty

Dis

Attempts:

3 left

💡 Hint

Common Mistakes

Using len(my_list) without comparison.

Using 'is' which is incorrect here.

Using a non-existent function 'empty'.

Using 'not' before the list checks if the list is empty (False when empty).

4fill in blank

hard

Fill both blanks to create a parametrized pytest test that checks if numbers are even.

PyTest

@pytest.mark.parametrize('num', [2, 3, 4])
def test_even(num):
    assert num [1] 2 == 0
    assert isinstance(num, [2])

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

A%

Bint

Cfloat

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '%' for modulus.

Checking type with 'float' instead of 'int'.

The modulus operator '%' checks remainder. 'int' checks the type of num.

5fill in blank

hard

Fill all three blanks to create a test that uses a fixture, asserts a condition, and checks type.

PyTest

@pytest.fixture
def data():
    return {'a': 1, 'b': 2}

def test_data([1]):
    assert [2]['a'] == 1
    assert isinstance([3], dict)

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

Adata

Dinput

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for fixture parameter and variable.

Not checking the correct key in the dictionary.

The fixture name 'data' is used as parameter and variable to access the dictionary.