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How to use test_should_emit_focus_event method in Playwright Python

Best Python code snippet using playwright-python

test_focus.py

Source:test_focus.py

...16    await page.set_content("<div id=d1 tabIndex=0></div>")17    assert await page.evaluate("() => document.activeElement.nodeName") == "BODY"18    await page.focus("#d1")19    assert await page.evaluate("() => document.activeElement.id") == "d1"20async def test_should_emit_focus_event(page):21    await page.set_content("<div id=d1 tabIndex=0></div>")22    focused = []23    await page.expose_function("focusEvent", lambda: focused.append(True))24    await page.evaluate("() => d1.addEventListener('focus', focusEvent)")25    await page.focus("#d1")26    assert focused == [True]27async def test_should_emit_blur_event(page):28    await page.set_content(29        "<div id=d1 tabIndex=0>DIV1</div><div id=d2 tabIndex=0>DIV2</div>"30    )31    await page.focus("#d1")32    focused = []33    blurred = []34    await page.expose_function("focusEvent", lambda: focused.append(True))...

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
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Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
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Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.