Fixture composition in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a fixture that returns a simple string.

PyTest

import pytest

@pytest.fixture
def greeting():
    return [1]

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

A"hello"

Bhello

C'greet'

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Returning a variable name instead of a string literal.

The fixture should return a string literal, so it must be quoted. Option A correctly returns the string "hello".

2fill in blank

medium

Complete the code to use the 'greeting' fixture inside another fixture.

PyTest

import pytest

@pytest.fixture
def greeting():
    return "hello"

@pytest.fixture
def welcome_message([1]):
    return f"{greeting}, world!"

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

Amsg

Bwelcome

Cmessage

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the fixture name.

Not passing the fixture as a parameter.

To use one fixture inside another, you add it as a parameter with the same name. Here, 'greeting' is the fixture to use.

3fill in blank

hard

Fix the error in the test function to use the 'welcome_message' fixture correctly.

PyTest

def test_message([1]):
    assert welcome_message == "hello, world!"

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

Agreeting

Bmessage

Cwelcome_message

Dmsg

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the fixture name.

Not accepting the fixture as a parameter.

The test function must accept the fixture name as a parameter to use its value. Here, 'welcome_message' is the fixture to use.

4fill in blank

hard

Fill both blanks to create a fixture that modifies the 'greeting' fixture by adding punctuation.

PyTest

@pytest.fixture
def excited_greeting([1]):
    return [2] + "!"

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

Agreeting

Bgreeting()

Dexcited

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the fixture parameter as a function.

Using a wrong parameter name.

The fixture 'excited_greeting' takes 'greeting' as a parameter (the fixture itself), and returns it with an exclamation mark. Using 'greeting' (the parameter) is correct; calling it as a function is incorrect.

5fill in blank

hard

Fill all three blanks to write a test that uses the 'excited_greeting' fixture and asserts its value.

PyTest

def test_excited([1]):
    assert [2] == [3]

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

Aexcited_greeting

C"hello!"

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong fixture name as parameter.

Comparing to the wrong expected string.

Not accepting the fixture as a parameter.

The test function accepts the 'excited_greeting' fixture as a parameter, asserts that its value equals the string "hello!".