PAF - Python Automation Framework

Python implementation of Testerra API.

It is basically a wrapper for Selenium WebDriver and WebElement which brings some more comfort features. This is not a test framework, but it implements assertion features anyway.

The basic concept is, to identify WebElements on every action or property accessor to prevent StaleElementExceptions.

Quick start

import inject
import paf.config
from paf.locator import By
from paf.page import FinderPage, PageFactory

# Configure dependency injection
inject.configure(paf.config.inject)

# Instantiate the page factory
page_factory = inject.instance(PageFactory)

# Create a simple finder page
page = page_factory.create_page(FinderPage)

# Visit URL
page.open("https://google.com")

# Find element
element = page.find("#q")

# Perform actions
element.type("Search")

# Perform assertions
element.expect.text.be("Search")

Prerequisites

• You need at least a local WebDriver installed.

  brew|choco|apt install chromedriver
  

Feature list

• UiElements
• Locators
• Page objects
• Components
• Managing WebDrivers
• Execution controlling
• Inject listeners

Missing features (tdb)

• Rect assertions
• Drag & Drop over frames

Environment variables

• PAF_BROWSER_SETTING=chrome:90: Sets the requested browser name and it's version.
• PAF_WINDOW_SIZE=1920x1080: Sets the browsers initial window size.
• PAF_WINDOW_POSITION=0x0: Place the initial window to a different location/screen.
• PAF_WINDOW_MAXIMIZE=False: Maximize the initial window.
• PAF_SCREENSHOTS_DIR=screenshots: Sets the screenshots' directory.
• PAF_SEQUENCE_WAIT_AFTER_FAIL=0.3: Wait in seconds whenever a sequence action fails.
• PAF_SEQUENCE_RETRY_COUNT=3: Retry count for every sequence action.
• PAF_DEMO_MODE=0: Enables the demo mode by highlighting actions and assertions.
• PAF_SELENIUM_SERVER_URL=http://127.0.0.1:4444: Uses Selenium server if set.
• PAF_DRIVER_PATH: Path to Webdriver binary
• PAF_BINARY_PATH: Path to User agent's binary

Examples

Some real world examples.

1. test_google.py: is a regular Google search, implemented with Page Objects and Components.
2. test_todo_mvc.py: are re-implemented test cases from the Robot Framework TodoMVC example. It's IMHO developer friendly, better readable and less code.
3. test_asyncio.py: Parallel execution via asyncio.
4. test_monkeytype.py: Typing test on https://monkeytype.com

Comparison

Comparison of the syntax with other frameworks.

Pylenium

py.get("a[href='/about']").should().have_text("About")

find("a[href='/about']").expect.text.be("About")

SeleniumBase

self.assert_text_not_visible("Thanks for your purchase.", "#app .success")

find("#app .success").expect.text.not_be("Thanks for your purchase.")

Selene

browser.all('#rso>div').should(have.size_greater_than(5)) \
    .first.should(have.text('Selenium automates browsers'))

div = find("#rso>div")
div.expect.count.greater_than(5).be(True)
div.first.expect.text.be("Selenium automates browsers")

References: https://www.nextgenerationautomation.com/post/python-test-automation-frameworks

Developer area

Testing

Run the tests on your local machine

PAF_TEST_HEADLESS=1 PAF_TEST_LOCAL_SELENIUM=0 pytest --cov=paf -n=4 test

Build test base container (for use in GitHub Actions)

podman build -f ubuntu-base.Dockerfile --arch=amd64 -t paf-test-base:latest
source build.env
echo $DOCKER_CONTAINER_REGISTRY_TOKEN | podman login -u mreiche --password-stdin ghcr.io
podman push paf-test-base:latest docker://ghcr.io/mreiche/paf-test-base:latest

Build test runner container (for testing)

Run tests within container

podman run -e PAF_TEST_HEADLESS=1 -e PAF_TEST_CONTAINER=1 -e PAF_TEST_LOCAL_SELENIUM=0 paf-test-base:latest pytest --cov=paf -n=4 test

Run local selenium server

wget https://github.com/SeleniumHQ/selenium/releases/download/selenium-4.9.0/selenium-server-4.9.0.jar -O selenium-server.jar
java -jar selenium-server.jar standalone --host 127.0.0.1

Debug XPaths in Browser's Developer Console

xpath = "//dt[.//text()='Title:']/following-sibling::dd[1]"
snapshot = document.evaluate(xpath, document.body, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE)
snapshot.snapshotItem(0).textContent

References

• https://tecadmin.net/setup-selenium-chromedriver-on-ubuntu/
• https://stackoverflow.com/questions/46052736/python-proxy-class
• https://chromedriver.chromium.org/
• Make stealth WebDriver: https://stackoverflow.com/questions/33225947/can-a-website-detect-when-you-are-using-selenium-with-chromedriver