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82 lines
3.2 KiB
Python
82 lines
3.2 KiB
Python
import pytest
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from textual.app import App
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from textual.widgets import Static
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async def test_mount_via_app() -> None:
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"""Perform mount tests via the app."""
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# Make a background set of widgets.
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widgets = [Static(id=f"starter-{n}") for n in range( 10 )]
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async with App().run_test() as pilot:
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# Mount the first one and make sure it's there.
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await pilot.app.mount(widgets[0])
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assert len(pilot.app.screen.children) == 1
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assert pilot.app.screen.children[0] == widgets[0]
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# Mount the next 2 widgets via mount.
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await pilot.app.mount(*widgets[1:3])
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assert list(pilot.app.screen.children) == widgets[0:3]
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# Finally mount the rest of the widgets via mount_all.
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await pilot.app.mount_all(widgets[3:])
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assert list(pilot.app.screen.children) == widgets
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async with App().run_test() as pilot:
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# Mount a widget before -1, which is "before the end".
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penultimate = Static(id="penultimate")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(penultimate, before=-1)
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assert pilot.app.screen.children[-2] == penultimate
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async with App().run_test() as pilot:
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# Mount a widget after -1, which is "at the end".
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ultimate = Static(id="ultimate")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(ultimate, after=-1)
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assert pilot.app.screen.children[-1] == ultimate
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async with App().run_test() as pilot:
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# Mount a widget before 0, which is "at the start".
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start = Static(id="start")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(start, before=0)
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assert pilot.app.screen.children[0] == start
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async with App().run_test() as pilot:
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# Mount a widget after 0. You get the idea...
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second = Static(id="second")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(second, after=0)
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assert pilot.app.screen.children[1] == second
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async with App().run_test() as pilot:
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# Mount a widget relative to another via query.
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queue_jumper = Static(id="queue-jumper")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(queue_jumper, after="#starter-5")
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assert pilot.app.screen.children[6] == queue_jumper
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async with App().run_test() as pilot:
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# Mount a widget relative to another via query.
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queue_jumper = Static(id="queue-jumper")
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await pilot.app.mount_all(widgets)
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await pilot.app.mount(queue_jumper, after=widgets[5])
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assert pilot.app.screen.children[6] == queue_jumper
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async with App().run_test() as pilot:
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# Make sure we get told off for trying to before and after.
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await pilot.app.mount_all(widgets)
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with pytest.raises(Static.MountError):
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await pilot.app.mount(Static(), before=2, after=2)
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async with App().run_test() as pilot:
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# Make sure we get told off trying to mount relative to something
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# that isn't actually in the DOM.
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await pilot.app.mount_all(widgets)
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with pytest.raises(Static.MountError):
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await pilot.app.mount(Static(), before=Static())
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with pytest.raises(Static.MountError):
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await pilot.app.mount(Static(), after=Static())
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