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57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
from textual.app import App, ComposeResult
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from textual.containers import Horizontal, Vertical
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from textual.lazy import Lazy, Reveal
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from textual.widgets import Label
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class LazyApp(App):
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def compose(self) -> ComposeResult:
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with Vertical():
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with Lazy(Horizontal()):
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yield Label(id="foo")
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with Horizontal():
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yield Label(id="bar")
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async def test_lazy():
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app = LazyApp()
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async with app.run_test() as pilot:
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# No #foo on initial mount
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assert len(app.query("#foo")) == 0
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assert len(app.query("#bar")) == 1
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await pilot.pause()
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await pilot.pause()
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# #bar mounted after refresh
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assert len(app.query("#foo")) == 1
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assert len(app.query("#bar")) == 1
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class RevealApp(App):
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def compose(self) -> ComposeResult:
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with Reveal(Vertical()):
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yield Label(id="foo")
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yield Label(id="bar")
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yield Label(id="baz")
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async def test_lazy_reveal():
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app = RevealApp()
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async with app.run_test() as pilot:
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# No #foo on initial mount
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# Only first child should be available initially
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assert app.query_one("#foo").display
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# Next two aren't mounted yet
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assert not app.query("#bar")
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assert not app.query("#baz")
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# All children should be visible after a pause
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await pilot.pause()
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for n in range(3):
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await pilot.pause(1 / 60)
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await pilot.pause()
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assert app.query_one("#foo").display
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assert app.query_one("#bar").display
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assert app.query_one("#baz").display
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