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from textual.app import App, ComposeResult
from textual.widgets import Label
async def test_hide() -> None:
"""Check that setting visibility produces Hide messages."""
# https://github.com/Textualize/textual/issues/3460
visibility: list[bool] = []
class ShowHideLabel(Label):
def on_show(self) -> None:
visibility.append(True)
def on_hide(self) -> None:
visibility.append(False)
class ShowHideApp(App[None]):
BINDINGS = [("space", "toggle_label")]
def compose(self) -> ComposeResult:
yield ShowHideLabel("Here I am")
def action_toggle_label(self) -> None:
self.query_one(ShowHideLabel).visible = not self.query_one(
ShowHideLabel
).visible
app = ShowHideApp()
async with app.run_test() as pilot:
assert visibility == [True]
await pilot.press("space")
assert visibility == [True, False]
await pilot.press("space")
assert visibility == [True, False, True]
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