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"""Test https://github.com/Textualize/textual/issues/4248"""
from textual.app import App, ComposeResult
from textual.widgets import Label
async def test_issue_4248() -> None:
"""Various forms of click parameters should be fine."""
bumps = 0
class ActionApp(App[None]):
def compose(self) -> ComposeResult:
yield Label("[@click=]click me and crash[/]", id="no-params")
yield Label("[@click=()]click me and crash[/]", id="empty-params")
yield Label("[@click=foobar]click me[/]", id="unknown-sans-parens")
yield Label("[@click=foobar()]click me[/]", id="unknown-with-parens")
yield Label("[@click=app.bump]click me[/]", id="known-sans-parens")
yield Label("[@click=app.bump()]click me[/]", id="known-empty-parens")
yield Label("[@click=app.bump(100)]click me[/]", id="known-with-param")
def action_bump(self, by_value: int = 1) -> None:
nonlocal bumps
bumps += by_value
app = ActionApp()
async with app.run_test() as pilot:
assert bumps == 0
await pilot.click("#no-params")
assert bumps == 0
await pilot.click("#empty-params")
assert bumps == 0
await pilot.click("#unknown-sans-parens")
assert bumps == 0
await pilot.click("#unknown-with-parens")
assert bumps == 0
await pilot.click("#known-sans-parens")
assert bumps == 1
await pilot.click("#known-empty-parens")
assert bumps == 2
await pilot.click("#known-with-param")
assert bumps == 102
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