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How to use test_expose_binding method in Playwright Python

Best Python code snippet using playwright-python

test_page.py

Source:test_page.py

...229            }"""230        )231    response = await response_info.value232    assert response.url == server.PREFIX + "/digits/2.png"233async def test_expose_binding(page):234    binding_source = []235    def binding(source, a, b):236        binding_source.append(source)237        return a + b238    await page.expose_binding("add", lambda source, a, b: binding(source, a, b))239    result = await page.evaluate("add(5, 6)")240    assert binding_source[0]["context"] == page.context241    assert binding_source[0]["page"] == page242    assert binding_source[0]["frame"] == page.main_frame243    assert result == 11244async def test_expose_function(page, server):245    await page.expose_function("compute", lambda a, b: a * b)246    result = await page.evaluate("compute(9, 4)")247    assert result == 36...

Playwright tutorial

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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.
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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.
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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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