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How to use test_should_wait_for_enabled_button method in Playwright Python
Best Python code snippet using playwright-python
test_element_handle_wait_for_element_state.py
...53 div = page.query_selector("div")54 page.evaluate("setTimeout(() => div.remove(), 250)")55 div.wait_for_element_state("hidden")56 assert div.is_hidden()57def test_should_wait_for_enabled_button(page, server):58 page.set_content("<button id=button disabled><span>Target</span></button>")59 span = page.query_selector("text=Target")60 page.evaluate("setTimeout(() => button.disabled = false, 250)")61 assert span.is_enabled() is False62 span.wait_for_element_state("enabled")63 assert span.is_enabled()64def test_should_throw_waiting_for_enabled_when_detached(page):65 page.set_content("<button id=button disabled>Target</button>")66 button = page.query_selector("button")67 page.evaluate("setTimeout(() => button.remove(), 250)")68 with pytest.raises(Error) as exc_info:69 button.wait_for_element_state("enabled")70 assert "Element is not attached to the DOM" in exc_info.value.message71def test_should_wait_for_disabled_button(page):...
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For the 1st form:
def get_playwright():
with sync_playwright() as playwright:
yield playwright
print(get_playwright()) # <generator object get_playwright at 0x108aac580>
That is expected because get_playwright is a generator, which returns a generator iterator, which you have to call next(...) on to get each yielded value from the iterator.
Consider a simpler, non-playwright example:
In [14]: def generate_nums():
...: for num in range(10):
...: yield num
...:
In [15]: nums = generate_nums()
In [16]: nums
Out[16]: <generator object generate_nums at 0x11115e6d0>
In [17]: next(nums)
Out[17]: 0
In [18]: next(nums)
Out[18]: 1
In [19]: next(nums)
Out[19]: 2
For more examples, see Understanding generators in Python.
Since your get_playwright returns an iterator, you need to call next() once to get the actual object:
from playwright.sync_api import sync_playwright
def get_playwright():
with sync_playwright() as playwright:
yield playwright
playwright_generator = get_playwright()
print(playwright_generator) # <generator object get_playwright at 0x104031580>
playwright = next(playwright_generator)
print(playwright) # <playwright._impl._playwright.Playwright object at 0x1041aabb0>
For the 2nd form:
@pytest.fixture()
def get_playwright():
with sync_playwright() as playwright:
yield playwright
def test(get_playwright):
print(get_playwright)
It should be the same case, but it's just that pytest automatically calls next() on the fixture value if it's a generator. I could not find documentation for this behavior from the pytest docs, but it was mentioned by one of the pytest author's/maintainer's in a different answer:
Here's roughly the execution here
- pytest notices your fixture is used for the test function
- pytest calls the fixture function
- since it is a generator, it returns immediately without executing code
- pytest notices it is a generator, calls
next(...)on it
- this causes the code to execute until the
yieldand then "pausing". you can think of it kind of as a co-routine ...- pytest then executes your test function
...which is probably why the value passed to your test function is already the next-ed value, the playwright object.
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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.
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- 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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- 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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