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How to use test_should_error_when_saving_after_deletion method in Playwright Python
Best Python code snippet using playwright-python
test_download.py
Source:test_download.py 
...149 "Pass { accept_downloads: True } when you are creating your browser context"150 in exc.value.message151 )152 await page.close()153async def test_should_error_when_saving_after_deletion(tmpdir, browser, server):154 page = await browser.new_page(accept_downloads=True)155 await page.set_content(f'<a href="{server.PREFIX}/download">download</a>')156 async with page.expect_download() as download_info:157 await page.click("a")158 download = await download_info.value159 user_path = tmpdir / "download.txt"160 await download.delete()161 with pytest.raises(Error) as exc:162 await download.save_as(user_path)163 assert "Download already deleted. Save before deleting." in exc.value.message164 await page.close()165async def test_should_report_non_navigation_downloads(browser, server):166 # Mac WebKit embedder does not download in this case, although Safari does.167 def handle_download(request):...
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There is several good practices for creating locators/selectors. Using playwright there is official documentation for each common and unique selector on how-to and what-is doing.
More information in https://playwright.dev/docs/selectors#text-selector
About your case, i would suggest always to use an parent selector for locating an element. When there is a button, try to find its unique parent.
- By id
- By unique class
- Something else unique.
Example:
<dv id=test>
<button id=continue-test>Continue</button>
</div>
In this case you can use the unique id of the button and not the text.
Selector css: #continue-test
But if you, don't have an unique identifier for the button you can use the parent and go down to the button.
Selector css: #test > button
Matching text using css is not possible, but with XPATH can look like this:
//button[text()="Continue"]
This selector MATCHES the text using "equals".
Using playwright:
button:has-text("Continue")
Using has-text and quotes - matches the text using equals.
If you are using another selector for example text=Continue, this will match all elements that CONTAINS the text "Continue"
All this is explained with example in the official documentation for playwright selectors. That does not mean to not use XPATH to achieve the goals.
CSS selectors are fast but kind of restricted to work with text.
Xpath is quite slower but much more powerful to work in text/parent/child elements etc.
I would suggest always to use an parent element with unique identifier and go down to reach your actual element, which will receive the interaction.
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