Fixtures for browser setup/teardown in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the pytest fixture decorator.

Selenium Python

from pytest import [1]

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

Atest

Bmark

Cfixture

Dparametrize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'test' or 'mark' instead of 'fixture'.

Forgetting to import the fixture decorator.

The fixture decorator is used to define setup and teardown code in pytest.

2fill in blank

medium

Complete the fixture function to initialize the Chrome browser.

Selenium Python

import pytest
from selenium import webdriver

@pytest.fixture
def browser():
    driver = webdriver.[1]()
    yield driver
    driver.quit()

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

AChrome

BSafari

CFirefox

DEdge

Attempts:

3 left

💡 Hint

Common Mistakes

Using Firefox or Safari when Chrome is required.

Forgetting to call the browser constructor as a function.

To open a Chrome browser, use webdriver.Chrome().

3fill in blank

hard

Fix the error in the fixture to properly close the browser after the test.

Selenium Python

@pytest.fixture
def browser():
    driver = webdriver.Chrome()
    yield driver
    driver.[1]()

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

Aexit

Bquit

Cstop

Dclose

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'close' which only closes one tab.

Using non-existent methods like 'stop' or 'exit'.

driver.quit() closes all browser windows and ends the session properly.

4fill in blank

hard

Fill both blanks to create a fixture that opens Firefox and maximizes the window before yielding.

Selenium Python

@pytest.fixture
def browser():
    driver = webdriver.[1]()
    driver.[2]()
    yield driver
    driver.quit()

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

AFirefox

BChrome

Cmaximize_window

Dminimize_window

Attempts:

3 left

💡 Hint

Common Mistakes

Using Chrome instead of Firefox.

Using 'minimize_window' instead of 'maximize_window'.

Use webdriver.Firefox() to open Firefox and maximize_window() to maximize the browser window.

5fill in blank

hard

Fill all three blanks to create a fixture that opens Edge, sets an implicit wait, and then yields the driver.

Selenium Python

@pytest.fixture
def browser():
    driver = webdriver.[1]()
    driver.[2](10)
    yield driver
    driver.[3]()

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

AEdge

Bimplicitly_wait

Cquit

Dmaximize_window

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'maximize_window' instead of 'implicitly_wait'.

Forgetting to call 'quit()' to close the browser.

Use webdriver.Edge() to open Edge, implicitly_wait(10) to wait up to 10 seconds for elements, and quit() to close the browser.

Practice

1. What is the main purpose of using a fixture for browser setup and teardown in Selenium tests?

easy

A. To avoid using assertions in tests

B. To write test cases faster without any setup

C. To automate opening and closing the browser before and after tests

D. To run tests only on one browser type

Solution

1. Step 1: Understand fixture role

   Fixtures help prepare the environment before tests and clean up after tests.

2. Step 2: Apply to browser context

   In Selenium, this means opening the browser before tests and closing it after.

3. Final Answer:

   To automate opening and closing the browser before and after tests -> Option C

4. Quick Check:

   Fixture = setup + teardown automation [OK]

Hint: Fixtures handle setup and cleanup automatically [OK]

Common Mistakes:

• Thinking fixtures replace test cases
• Believing fixtures remove need for assertions
• Assuming fixtures limit browser types

2. Which of the following is the correct way to define a pytest fixture for browser setup and teardown using yield?

easy

A. def browser():
driver = webdriver.Chrome()
yield driver
driver.quit()

B. def browser():
driver = webdriver.Chrome()
driver.quit()
yield driver

C. def browser():
yield webdriver.Chrome()
driver.quit()

D. def browser():
driver = webdriver.Chrome()
driver.close()
yield driver

Solution

1. Step 1: Understand yield usage in fixtures

   Yield separates setup (before yield) and teardown (after yield).

2. Step 2: Check correct order

   Setup: create driver; yield it; teardown: quit driver.

3. Final Answer:

   def browser(): driver = webdriver.Chrome() yield driver driver.quit() -> Option A

4. Quick Check:

   Setup before yield, teardown after yield [OK]

Hint: Setup before yield, teardown after yield in fixture [OK]

Common Mistakes:

• Calling quit before yield
• Using driver.close() instead of driver.quit() for teardown
• Yielding before creating driver

3. Given this fixture and test code, what will be printed when the test runs?

import pytest
from selenium import webdriver

@pytest.fixture
def browser():
    driver = webdriver.Chrome()
    print('Setup browser')
    yield driver
    print('Teardown browser')
    driver.quit()

def test_example(browser):
    print('Running test')

medium

A. Running test only

B. Running test\nSetup browser\nTeardown browser

C. Setup browser\nTeardown browser\nRunning test

D. Setup browser\nRunning test\nTeardown browser

Solution

1. Step 1: Trace fixture execution order

   Fixture runs setup code before yield, then test runs, then fixture runs teardown after yield.

2. Step 2: Match print statements order

   Prints 'Setup browser', then 'Running test', then 'Teardown browser'.

3. Final Answer:

   Setup browser\nRunning test\nTeardown browser -> Option D

4. Quick Check:

   Setup -> Test -> Teardown order [OK]

Hint: Fixture setup prints before test, teardown prints after [OK]

Common Mistakes:

• Assuming teardown runs before test
• Ignoring yield separates setup and teardown
• Thinking prints run all before test

4. What is wrong with this fixture code for browser setup and teardown?

@pytest.fixture
def browser():
    driver = webdriver.Chrome()
    driver.quit()
    yield driver

medium

A. Missing import statement for webdriver

B. Calling driver.quit() before yield closes browser too early

C. Yield should be inside a try-except block

D. Fixture should return driver instead of yield

Solution

1. Step 1: Analyze order of operations

   driver.quit() is called before yield, so browser closes before test uses it.

2. Step 2: Understand yield role

   Yield should come before teardown to keep browser open during test.

3. Final Answer:

   Calling driver.quit() before yield closes browser too early -> Option B

4. Quick Check:

   Teardown must be after yield [OK]

Hint: Teardown code must be after yield in fixture [OK]

Common Mistakes:

• Calling quit before yield
• Confusing yield with return
• Ignoring fixture import requirements

5. You want to run multiple tests using the same browser instance to save time. How should you modify the fixture to achieve this?

hard

A. Change fixture scope to 'module' so browser opens once per module

B. Add driver.quit() before yield to close browser early

C. Remove yield and return driver directly

D. Create a new fixture for each test to isolate browser

Solution

1. Step 1: Understand fixture scopes

   Default scope is 'function' which runs fixture per test; 'module' runs once per file.

2. Step 2: Apply scope to reuse browser

   Setting scope='module' opens browser once for all tests in module, saving time.

3. Final Answer:

   Change fixture scope to 'module' so browser opens once per module -> Option A

4. Quick Check:

   Fixture scope controls reuse [OK]

Hint: Use scope='module' to share browser across tests [OK]

Common Mistakes:

• Closing browser before tests run
• Removing yield breaks setup/teardown
• Creating new fixture per test wastes time