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How to use test_should_emit_close_events method in Playwright Python

Best Python code snippet using playwright-python

test_websocket.py

Source:test_websocket.py

...25        ws_server.PORT,26    )27    assert value == "incoming"28    pass29async def test_should_emit_close_events(page, ws_server):30    async with page.expect_event("websocket") as ws_info:31        await page.evaluate(32            """port => {33            let cb;34            const result = new Promise(f => cb = f);35            const ws = new WebSocket('ws://localhost:' + port + '/ws');36            ws.addEventListener('message', data => { ws.close(); cb(data.data); });37            return result;38        }""",39            ws_server.PORT,40        )41    ws = await ws_info.value42    assert ws.url == f"ws://localhost:{ws_server.PORT}/ws"43    if not ws.is_closed():...

Playwright tutorial

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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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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.
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